
                                    UNITED STATES
                           SECURITIES AND EXCHANGE COMMISSION
                                 Washington, D.C.  20549


                                        FORM 8-K


                     Current Report Pursuant To Section 13 or 15(d) of
                            the Securities Exchange Act of 1934

           Date of Report (Date of earliest event reported):  May 25, 2007
                          (Date of earliest event reported)

            IndyMac MBS Inc (as Depositor under the Pooling and Servicing
                Agreement, dated as August 1, 2003, providing for the
                   issuance of IndyMac MBS, Inc. Residential Asset-
                     Securitization Trust Series 2003-A9 Mortgage
                        Pass-Through Certificates Series 2003-I.
                 (Exact name of registrant as specified in charter)


                                    DELAWARE
                     (State or Other Jurisdiction of Incorporation)

               333-102888-08                         95-4791925
          (Commission File Number)        (I.R.S. Employer Identification No.)


          155 NORTH LAKE AVENUE
          PASADENA, CALIFORNIA                         91101
          (Address of principal executive offices)     (Zip Code)


          Registrant's Telephone Number, Including Area Code:  (800) 669-2300


(Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to
simultaneously satisfy the filing obligation of the registrant under any
of the following provisions (see General Instruction A.2. below):

[  ] Written communications pursuant to Rule 425 under the Securities Act
(17 CFR 230.425)

[  ] Soliciting material pursuant to Rule 14a-12(b) under the Exchange Act
(17 CFR 240.14a-12(b))

[  ] Pre-commencement communications pursuant to Rule 14d-2(b) under the
Exchange Act (17 CFR 240.14d-2(b))

[  ] Pre-commencement communications pursuant to Rule 13e-4(c) under the
Exchange Act (17 CFR 240.13e-4(c))


     Item 8.01  Other Events

     Attached hereto is a copy of the Monthly Remittance Statements to the
     Certificateholders which was derived from the monthly information
     submitted by the Master Servicer of the Trust to the Trustee.


     Item 9.01 Financial Statements and Exhibits

     (c) Exhibits:

     Exhibit No. Description

     99.1 Monthly Remittance Statement to the Certificateholders dated as of
     May 25, 2007.

                                    Signatures

               Pursuant to the requirements of the Securities Exchange Act of
          1934, the Registrant has duly caused this report to be signed on its
          behalf by the undersigned, hereunto duly authorized.

                                   Deutsche Bank National Trust Company,
                                  in its capacity as Trustee under the
                                  Pooling and Servicing Agreement on
                                  behalf of IndyMac MBS INC., Registrant


          Date:  May 29, 2007               By:  /s/  Katherine M. Wannenmacher
                                            Katherine M. Wannenmacher
                                            Vice President


                                   EXHIBIT INDEX

          DOCUMENT

          99.1 Monthly Remittance Statement to the Certificateholders
          dated as of May 25, 2007.



IndyMac Residential Asset Securitization Trust 2003-A9

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
May 25, 2007 Distribution

		External Parties			Table of Contents

						Page
		Seller				Page
		Seller			1. Certificate Payment Report			2
		IndyMac Bank			1. Certificate Payment Report			2
		IndyMac Bank			2. Collection Account Report			4
					2. Collection Account Report			4
					3. Credit Enhancement Report			6
		Servicer(s)			3. Credit Enhancement Report			6
		Servicer(s)			4. Collateral Report			7
		IndyMac Bank			4. Collateral Report			7
		IndyMac Bank			5. Delinquency Report			10
					6. REO Report			11
		Underwriter(s)			6. REO Report			11
		Underwriter(s)			7. Foreclosure Report			12
		Greenwich Capital Markets			7. Foreclosure Report			12
		Greenwich Capital Markets			8. Prepayment Report			13
					9. Prepayment Detail Report			18
					9. Prepayment Detail Report			18
					10. Realized Loss Report			19
					11. Realized Loss Detail Report			22
					12. Triggers and Adj. Cert. Report			23
					13. Other Related Information			24


					Total Number of Pages			24
					Total Number of Pages

		Dates			Contacts

		Cut-Off Date:	July 01, 2003			Kiet Nguyen
		Close Date:	July 28, 2003			Administrator
		First Distribution Date:		August 25, 2003		(714) 247-6312
						Kiet.Nguyen@db.com
						Kiet.Nguyen@db.com
						Address:
		Distribution Date:		May 25, 2007		Address:
		Distribution Date:		May 25, 2007		1761 E. St. Andrew Place, Santa Ana, CA 92705
						1761 E. St. Andrew Place, Santa Ana, CA 92705

		Record Date:	April 30, 2007
						Factor Information:		(800) 735-7777
						Factor Information:		(800) 735-7777
						Main Phone Number:		(714) 247-6000





						https://www.tss.db.com/invr
						https://www.tss.db.com/invr






Page 1 of 24
IndyMac Residential Asset Securitization Trust 2003-A9

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
May 25, 2007 Distribution

Certificate Payment Report
Current Period Distribution - Senior Certificates
			Prior						Current
			Prior

	Class	Original	Principal			Total	Realized	Deferred	Principal

Class	Type	Face Value	Balance	Interest	Principal	Distribution	Loss	Interest	Balance
			(1)	(2)	(3)	(4)=(2)+(3)	(5)	(6)	(7)=(1)-(3)-(5)+(6)
A-1	AD,AS	35,000,000.00	12,820,715.02	42,735.72	153,174.30	195,910.02	0.00	0.00	12,667,540.72
A-1	AD,AS	35,000,000.00	12,820,715.02	42,735.72	153,174.30	195,910.02	0.00	0.00	12,667,540.72
A-2	Z,AS	3,175,425.00	3,688,397.40	0.00	0.00	0.00	0.00	12,294.66	3,700,692.06
A-3	FLT,AS	108,612,255.00	41,300,468.73	202,028.13	459,616.64	661,644.77	0.00	0.00	40,840,852.09
A-4	IO,INV,NTL	0.00	0.00	73,308.33	0.00	73,308.33	0.00	0.00	0.00
A-5	AD,TAC,AS	80,000,000.00	32,200,001.14	107,333.34	384,706.51	492,039.85	0.00	0.00	31,815,294.63
A-6	Z,SUP,AD	12,845,000.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00
A-7	AD,TAC,AS	50,000,000.00	20,125,001.01	58,697.92	240,441.57	299,139.49	0.00	0.00	19,884,559.44
A-8	IO,NTL	0.00	0.00	8,385.42	0.00	8,385.42	0.00	0.00	0.00
PO	PO,RSTP	112,246.00	63,296.03	0.00	101.58	101.58	0.00	0.00	63,194.45
A-X	IO,CSTR,NTL	0.00	0.00	13,440.39	0.00	13,440.39	0.00	0.00	0.00
AR	R,AS	100.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00
B-1	SUB,NAS	7,585,000.00	6,848,603.86	31,389.43	9,551.14	40,940.57	0.00	0.00	6,839,052.72
B-2	SUB,NAS	2,275,500.00	2,054,581.13	9,416.83	2,865.34	12,282.17	0.00	0.00	2,051,715.79
B-3	SUB,NAS	1,517,000.00	1,369,720.70	6,277.89	1,910.23	8,188.12	0.00	0.00	1,367,810.47
B-4	SUB,NAS	758,500.00	684,860.30	3,138.94	955.11	4,094.05	0.00	0.00	683,905.19
B-5	SUB,NAS	303,400.00	273,944.06	1,255.58	382.05	1,637.63	0.00	0.00	273,562.01
B-6	SUB,NAS	1,213,601.00	911,522.08	4,177.80	1,271.21	5,449.01	0.00	0.00	910,250.87
P	SUB	100.00	100.00	0.00	0.00	0.00	0.00	0.00	100.00

Total		303,398,127.00	122,341,211.46	561,585.72	1,254,975.68	1,816,561.40	0.00	12,294.66	121,098,530.44
Total




Interest Accrual Detail Current Period Factor Information per $1,000 of Original Face Value
					Orig. Principal	Prior				Current
					Orig. Principal	Prior				Current
	Period	Period			(with Notional)	Principal			Total	Principal
Class	Starting	Ending	Method	Cusip	Balance	Balance	Interest	Principal	Distribution	Balance
			Method
					(1)	(1)	(2)	(3)	(4)=(2)+(3)	(5)

A-1	04/01/07	04/30/07	F-30/360	45660NSW6	35,000,000.00	366.306143	1.221021	4.376409	5.597429	361.929735
A-1	04/01/07	04/30/07	F-30/360	45660NSW6	35,000,000.00	366.306143	1.221021	4.376409	5.597429	361.929735
A-2	04/01/07	04/30/07	F-30/360	45660NSX4	3,175,425.00	1,161.544486	0.000000	0.000000	0.000000	1,165.416302
A-3	04/25/07	05/24/07	A-30/360	45660NSY2	108,612,255.00	380.256065	1.860086	4.231720	6.091806	376.024345
A-4	04/25/07	05/24/07	A-30/360	45660NSZ9	108,612,255.00	380.256065	0.674954	0.000000	0.674954	376.024345
A-5	04/01/07	04/30/07	F-30/360	45660NTA3	80,000,000.00	402.500014	1.341667	4.808831	6.150498	397.691183
A-6	04/01/07	04/30/07	F-30/360	45660NTB1	12,845,000.00	0.000000	0.000000	0.000000	0.000000	0.000000
A-7	04/01/07	04/30/07	F-30/360	45660NTC9	50,000,000.00	402.500020	1.173958	4.808831	5.982790	397.691189
A-8	04/01/07	04/30/07	F-30/360	45660NTD7	50,000,000.00	402.500020	0.167708	0.000000	0.167708	397.691189
PO	04/01/07	04/30/07	F-30/360	45660NTE5	112,246.00	563.904549	0.000000	0.904977	0.904977	562.999572
A-X	04/01/07	04/30/07	A-30/360	45660NTF2	221,083,608.00	343.417321	0.060793	0.000000	0.060793	338.133384
AR		45660NTG0	100.00	0.000000	0.000000	0.000000	0.000000	0.000000
B-1	04/01/07	04/30/07	F-30/360	45660NTH8	7,585,000.00	902.914154	4.138356	1.259214	5.397570	901.654940
B-2	04/01/07	04/30/07	F-30/360	45660NTJ4	2,275,500.00	902.914142	4.138356	1.259213	5.397570	901.654929
B-3	04/01/07	04/30/07	F-30/360	45660NTK1	1,517,000.00	902.914107	4.138359	1.259216	5.397574	901.654891
B-4	04/01/07	04/30/07	F-30/360		758,500.00	902.914041	4.138352	1.259209	5.397561	901.654832
B-5	04/01/07	04/30/07	F-30/360		303,400.00	902.913843	4.138365	1.259229	5.397594	901.654614
B-6	04/01/07	04/30/07	F-30/360		1,213,601.00	751.088768	3.442482	1.047469	4.489952	750.041299
P			100.00	1,000.000000	0.000000	0.000000	0.000000	1,000.000000



Page 2 of 24
IndyMac Residential Asset Securitization Trust 2003-A9

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
May 25, 2007 Distribution


Distribution to Date - Senior Certificates
									Current


	Original		Unscheduled	Scheduled	Total	Total	Realized	Deferred	Principal

Class	Face Value	Interest	Principal	Principal	Principal	Distribution	Loss	Interest	Balance
(1)	(2)	(3)	(4)	(5)=(3)+(4)	(6)=(2)+(5)	(7)	(8)	(9)=(1)-(5)-(7)+(8)
A-1	35,000,000.00	3,381,183.30	19,813,306.68	2,519,152.60	22,332,459.28	25,713,642.58	0.00	0.00	12,667,540.72
A-2	3,175,425.00	0.00	0.00	0.00	0.00	0.00	0.00	525,267.06	3,700,692.06
A-3	108,612,255.00	8,624,966.13	60,127,021.15	7,644,381.76	67,771,402.91	76,396,369.04	0.00	0.00	40,840,852.09
A-4	0.00	12,622,264.19	0.00	0.00	0.00	12,622,264.19	0.00	0.00	0.00
A-5	80,000,000.00	8,190,868.91	42,864,461.92	5,320,243.44	48,184,705.36	56,375,574.27	0.00	0.00	31,815,294.63
A-6	12,845,000.00	0.00	11,630,448.77	1,703,964.24	13,334,413.01	13,334,413.01	0.00	489,413.01	0.00
A-7	50,000,000.00	4,479,381.54	26,790,288.44	3,325,152.12	30,115,440.57	34,594,822.11	0.00	0.00	19,884,559.44
A-8	0.00	639,911.77	0.00	0.00	0.00	639,911.77	0.00	0.00	0.00
PO	112,246.00	0.00	43,707.15	5,344.39	49,051.54	49,051.54	0.00	0.00	63,194.45
A-X	0.00	1,661,240.61	0.00	0.00	0.00	1,661,240.61	0.00	0.00	0.00
AR	100.00	0.31	34.70	65.30	100.00	100.31	0.00	0.00	0.00
B-1	7,585,000.00	1,508,987.76	19,608.07	726,339.22	745,947.29	2,254,935.05	0.00	0.00	6,839,052.72
B-2	2,275,500.00	452,696.41	5,882.42	217,901.80	223,784.22	676,480.63	0.00	0.00	2,051,715.79
B-3	1,517,000.00	301,797.62	3,921.61	145,267.92	149,189.53	450,987.15	0.00	0.00	1,367,810.47
B-4	758,500.00	150,898.86	1,960.81	72,634.00	74,594.81	225,493.67	0.00	0.00	683,905.19
B-5	303,400.00	60,359.58	784.32	29,053.67	29,837.99	90,197.57	0.00	0.00	273,562.01
B-6	1,213,601.00	219,991.54	2,646.40	111,020.08	113,666.47	333,658.01	189,683.58	0.00	910,250.87
P	100.00	294,747.72	0.00	0.00	0.00	294,747.72	0.00	0.00	100.00


Total	303,398,127.00	42,589,296.25	161,304,072.44	21,820,520.54	183,124,592.98	225,713,889.23	189,683.58	1,014,680.07	121,098,530.44


Interest Detail - Senior Certificates
	Pass	Prior Principal		Non-	Prior	Unscheduled		Paid or	Current
	Pass	Prior Principal		Non-	Prior	Unscheduled		Paid or

	Through	(with Notional)	Accrued	Supported	Unpaid	Interest	Optimal	Deferred	Unpaid

Class	Rate	Balance	Interest	Interest SF	Interest	Adjustment	Interest	Interest	Interest
			(1)	(2)	(3)	(4)	(5)=(1)-(2)+(3)+(4)	(6)	(7)=(5)-(6)
A-1	4.00000%	12,820,715.02	42,735.72	0.00	0.00	0.00	42,735.72	42,735.72	0.00
A-2	4.00000%	3,688,397.40	12,294.66	0.00	0.00	0.00	12,294.66	12,294.66	0.00
A-3	5.87000%	41,300,468.73	202,028.13	0.00	0.00	0.00	202,028.13	202,028.13	0.00
A-4	2.13000%	41,300,468.73	73,308.33	0.00	0.00	0.00	73,308.33	73,308.33	0.00
A-5	4.00000%	32,200,001.14	107,333.34	0.00	0.00	0.00	107,333.34	107,333.34	0.00
A-6	0.00000%	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00
A-7	3.50000%	20,125,001.01	58,697.92	0.00	0.00	0.00	58,697.92	58,697.92	0.00
A-8	0.50000%	20,125,001.01	8,385.42	0.00	0.00	0.00	8,385.42	8,385.42	0.00
PO	0.00000%	63,296.03	0.00	0.00	0.00	0.00	0.00	0.00	0.00
A-X	0.21243%	75,923,940.28	13,440.39	0.00	0.00	0.00	13,440.39	13,440.39	0.00
AR	0.00000%	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00
B-1	5.50000%	6,848,603.86	31,389.43	0.00	0.00	0.00	31,389.43	31,389.43	0.00
B-2	5.50000%	2,054,581.13	9,416.83	0.00	0.00	0.00	9,416.83	9,416.83	0.00
B-3	5.50000%	1,369,720.70	6,277.89	0.00	0.00	0.00	6,277.89	6,277.89	0.00
B-4	5.50000%	684,860.30	3,138.94	0.00	0.00	0.00	3,138.94	3,138.94	0.00
B-5	5.50000%	273,944.06	1,255.58	0.00	0.00	0.00	1,255.58	1,255.58	0.00
B-6	5.50000%	911,522.08	4,177.81	0.01	0.00	0.00	4,177.80	4,177.80	0.00
P	0.00000%	100.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00

Total		259,690,621.48	573,880.39	0.01	0.00	0.00	573,880.38	573,880.38	0.00



Page 3 of 24
IndyMac Residential Asset Securitization Trust 2003-A9

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
May 25, 2007 Distribution

Collection Account Report
SUMMARY

							Total
Principal Collections							1,242,681.02
Principal Withdrawals							0.00
Principal Other Accounts							0.00
TOTAL NET PRINCIPAL							1,242,681.02
Interest Collections							581,124.14
Interest Withdrawals							-0.00
Interest Other Accounts							0.00
Interest Fees							-7,243.76
TOTAL NET INTEREST							573,880.38
TOTAL AVAILABLE FUNDS FOR DISTRIBUTION							1,816,561.40




PRINCIPAL - COLLECTIONS

							Total
Scheduled Principal Received							170,620.47
Curtailments							19,534.01
Prepayments In Full							1,052,526.54
Repurchased/Substitutions							0.00
Liquidations							0.00
Insurance Principal							0.00
Other Additional Principal							0.00
Delinquent Principal							-145,436.90
Realized Losses							-0.00
Advanced Principal							145,436.90
TOTAL PRINCIPAL COLLECTED							1,242,681.02




PRINCIPAL - WITHDRAWALS

SPACE INTENTIONALLY LEFT BLANK




PRINCIPAL - OTHER ACCOUNTS

							Total
TOTAL PRINCIPAL OTHER ACCOUNTS							0.00






Page 4 of 24
IndyMac Residential Asset Securitization Trust 2003-A9

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
May 25, 2007 Distribution


INTEREST - COLLECTIONS

							Total
Scheduled Interest							606,161.64
Repurchased/Substitution Interest							0.00
Liquidation Interest							0.00
Insurance Interest							0.00
Other Additional Interest							0.00
Prepayment Interest Shortfalls							-839.54
Delinquent Interest							-509,260.22
Compensating Interest							839.54
Civil Relief Act Shortfalls							-0.00
Interest Advanced							484,222.71
Interest Realized Loss							0.00
TOTAL INTEREST COLLECTED							581,124.14




INTEREST - WITHDRAWALS

							Total
TOTAL INTEREST WITHDRAWALS							0.00




INTEREST - OTHER ACCOUNTS
INTEREST - OTHER ACCOUNTS
							Total
Prepayment Charges							0.00
TOTAL INTEREST OTHER ACCOUNTS							0.00




INTEREST FEES
INTEREST FEES
							Total
Current Servicing Fees							4,879.13
Trustee Fees							764.63
REMIC Tax Filing Fees							1,600.00
TOTAL INTEREST FEES							7,243.76



Page 5 of 24
IndyMac Residential Asset Securitization Trust 2003-A9

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
May 25, 2007 Distribution

Credit Enhancement Report
ACCOUNTS

SPACE INTENTIONALLY LEFT BLANK



INSURANCE

SPACE INTENTIONALLY LEFT BLANK



STRUCTURAL FEATURES

SPACE INTENTIONALLY LEFT BLANK





Page 6 of 24
IndyMac Residential Asset Securitization Trust 2003-A9

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
May 25, 2007 Distribution

Collateral Report


COLLATERAL




								Total



Loan Count:


Original							810
Prior							338
Prefunding							0
Scheduled Paid Offs							-0
Full Voluntary Prepayments							-4
Repurchases							-0
Liquidations							-0
Current							334
Principal Balance:


Original							303,250,183.98
Prior							122,341,111.46
Prefunding							0.00
Scheduled Principal							-170,620.47
Partial Prepayments							-19,534.01
Full Voluntary Prepayments							-1,052,526.54
Repurchases							-0.00
Liquidations							-0.00
Current							121,098,430.44





PREFUNDING

SPACE INTENTIONALLY LEFT BLANK







Page 7 of 24
IndyMac Residential Asset Securitization Trust 2003-A9

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
May 25, 2007 Distribution


CHARACTERISTICS
CHARACTERISTICS

							Total
Weighted Average Coupon Original							6.10169%
Weighted Average Coupon Prior							5.94668%
Weighted Average Coupon Current							5.94562%
Weighted Average Months to Maturity Original							358
Weighted Average Months to Maturity Prior							309
Weighted Average Months to Maturity Current							308
Weighted Avg Remaining Amortization Term Original							358
Weighted Avg Remaining Amortization Term Prior							309
Weighted Avg Remaining Amortization Term Current							308
Weighted Average Seasoning Original							1.15
Weighted Average Seasoning Prior							45.12
Weighted Average Seasoning Current							46.12










Page 8 of 24
IndyMac Residential Asset Securitization Trust 2003-A9

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
May 25, 2007 Distribution


ARM CHARACTERISTICS
ARM CHARACTERISTICS

							Total
Weighted Average Margin Original							0.00000%
Weighted Average Margin Prior							0.00000%
Weighted Average Margin Current							0.00000%
Weighted Average Max Rate Original							0.00000%
Weighted Average Max Rate Prior							0.00000%
Weighted Average Max Rate Current							0.00000%
Weighted Average Min Rate Original							0.00000%
Weighted Average Min Rate Prior							0.00000%
Weighted Average Min Rate Current							0.00000%
Weighted Average Cap Up Original							0.00000%
Weighted Average Cap Up Prior							0.00000%
Weighted Average Cap Up Current							0.00000%
Weighted Average Cap Down Original							0.00000%
Weighted Average Cap Down Prior							0.00000%
Weighted Average Cap Down Current							0.00000%




SERVICING FEES & ADVANCES
SERVICING FEES & ADVANCES

							Total




Current Servicing Fees							4,879.13
Delinquent Servicing Fees							25,037.51
TOTAL SERVICING FEES							29,916.62


Total Servicing Fees							29,916.62
Compensating Interest							-839.54
Delinquent Servicing Fees							-25,037.51
COLLECTED SERVICING FEES							4,039.58


Total Advanced Interest							484,222.71
Total Advanced Principal							145,436.90
Aggregate Advances with respect to this Distribution							629,659.61





ADDITIONAL COLLATERAL INFORMATION
ADDITIONAL COLLATERAL INFORMATION
							Total
Prepayment Interest Shortfall (PPIS)							839.54
Compensating Interest							(839.54)
Net Prepayment Interest Shortfall (PPIS)							0.00
Weighted Average Net Mortgage Rate							5.628986%





Page 9 of 24
IndyMac Residential Asset Securitization Trust 2003-A9

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
May 25, 2007 Distribution

Delinquency Report

TOTAL
		< 1 PAYMENT	1 PAYMENT	2 PAYMENTS	3+ PAYMENTS	TOTAL
DELINQUENT	Balance		1,366,628.85	552,428.76	0.00	1,919,057.61
	% Balance		1.13%	0.46%	0.00%	1.58%
	# Loans		5	2	0	7
	% # Loans		1.50%	0.60%	0.00%	2.10%
FORECLOSURE	Balance	0.00	0.00	0.00	642,946.20	642,946.20
	% Balance	0.00%	0.00%	0.00%	0.53%	0.53%
	# Loans	0	0	0	3	3
	% # Loans	0.00%	0.00%	0.00%	0.90%	0.90%
BANKRUPTCY	Balance	446,843.42	0.00	0.00	551,259.89	998,103.31
	% Balance	0.37%	0.00%	0.00%	0.46%	0.82%
	# Loans	1	0	0	1	2
	% # Loans	0.30%	0.00%	0.00%	0.30%	0.60%
REO	Balance	0.00	0.00	0.00	0.00	0.00
	% Balance	0.00%	0.00%	0.00%	0.00%	0.00%
	# Loans	0	0	0	0	0
	% # Loans	0.00%	0.00%	0.00%	0.00%	0.00%
TOTAL	Balance	446,843.42	1,366,628.85	552,428.76	1,194,206.09	3,560,107.12
	% Balance	0.37%	1.13%	0.46%	0.99%	2.94%
	# Loans	1	5	2	4	12
	% # Loans	0.30%	1.50%	0.60%	1.20%	3.59%








Page 10 of 24
IndyMac Residential Asset Securitization Trust 2003-A9

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
May 25, 2007 Distribution

REO Report
Loan Number	Original	Stated		Current	State &		First
Loan Number	Original	Stated		Current	State &		First
&	Principal	Principal	Paid to	Note	LTV at	Original	Payment
Loan Group	Balance	Balance	Date	Rate	Origination	Term	Date
					Origination









Page 11 of 24
IndyMac Residential Asset Securitization Trust 2003-A9

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
May 25, 2007 Distribution

Foreclosure Report
Loan Number	Original	Stated		Current	State &		First
Loan Number	Original	Stated		Current	State &		First
&	Principal	Principal	Paid to	Note	LTV at	Original	Payment
Loan Group	Balance	Balance	Date	Rate	Origination	Term	Date
					Origination

Became Foreclosure Property in a Prior Period:
2480409 1	47,000.00	44,817.55	01-Jun-2006	6.625%	AZ - 62.67%	360	01-Aug-2003
2661693 1	155,000.00	145,570.50	01-Aug-2006	6.250%	NY - 24.22%	360	01-Sep-2003
2688411 1	476,000.00	452,558.15	01-Oct-2006	6.625%	CA - 80.00%	360	01-Jul-2003


TOTAL	678,000.00	642,946.20
TOTAL


Page 12 of 24
IndyMac Residential Asset Securitization Trust 2003-A9

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
May 25, 2007 Distribution

Prepayment Report

VOLUNTARY PREPAYMENTS



								Total


Current


Number of Paid in Full Loans							4
Number of Repurchased Loans							0
Total Number of Loans Prepaid in Full							4
Curtailments Amount							19,534.01
Paid in Full Balance							1,052,526.54
Repurchased Loans Balance							0.00
Total Prepayment Amount							1,072,060.55
Cumulative


Number of Paid in Full Loans							435
Number of Repurchased Loans							39
Total Number of Loans Prepaid in Full							474
Paid in Full Balance							158,268,865.23
Repurchased Loans Balance							11,419,822.54
Curtailments Amount							1,481,403.70
Total Prepayment Amount							171,170,091.47










Page 13 of 24
IndyMac Residential Asset Securitization Trust 2003-A9

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
May 25, 2007 Distribution


VOLUNTARY PREPAYMENTS RATES - Including Liquidated Balances



								Total





SMM							0.88%
3 Months Avg SMM							1.23%
12 Months Avg SMM							1.17%
Avg SMM Since Cut-off							1.86%



CPR							10.04%
3 Months Avg CPR							13.83%
12 Months Avg CPR							13.14%
Avg CPR Since Cut-off							20.18%



PSA							167.28%
3 Months Avg PSA Approximation							230.57%
12 Months Avg PSA Approximation							219.02%
Avg PSA Since Cut-off Approximation							489.51%


(*) SMM, CPR, PSA Figures Include Liquidated Balances








Page 14 of 24
IndyMac Residential Asset Securitization Trust 2003-A9

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
May 25, 2007 Distribution








PREPAYMENT CALCULATION METHODOLOGY - Including Liquidated Balances

Single Monthly Mortality (SMM): (Voluntary partial and full prepayments + Repurchases + Liquidated Balances)/(Beg Principal Balance - Sched Principal)

Conditional Prepayment Rate (CPR): 1-((1-SMM)^12)
PSA Standard Prepayment Model: CPR/(0.20%*min(30,WAS))
PSA Standard Prepayment Model: CPR/(0.20%*min(30,WAS))
Average SMM over period between nth month and mth month (AvgSMMn,m): 1 - [(1-SMMn)(1-SMMn+1)...*(1-SMMm)]^(1/months in period n,m)
Average CPR over period between the nth month and mth month (AvgCPRn,m): 1-((1-AvgSMMn,m)^12)

Average PSA Approximation over period between the nth month and mth month: AvgCPRn,m/(0.20%*Avg WASn,m))
Average WASn,m: (min(30,WASn)+min(30,WASn+1)+...+min(30,WASm)/(number of months in the period n,m)

Weighted Average Seasoning (WAS)

Note: Prepayment rates are calculated since deal issue date and include partial and full voluntary prepayments and repurchases.
Dates correspond to distribution dates.




Page 15 of 24
IndyMac Residential Asset Securitization Trust 2003-A9

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
May 25, 2007 Distribution


VOLUNTARY PREPAYMENTS RATES - Excluding Liquidated Balances



								Total





SMM							0.88%
3 Months Avg SMM							1.23%
12 Months Avg SMM							1.14%
Avg SMM Since Cut-off							1.85%



CPR							10.04%
3 Months Avg CPR							13.83%
12 Months Avg CPR							12.89%
Avg CPR Since Cut-off							20.09%



PSA							167.28%
3 Months Avg PSA Approximation							230.57%
12 Months Avg PSA Approximation							214.88%
Avg PSA Since Cut-off Approximation							487.21%

(*) SMM, CPR, PSA Figures Exclude Liquidated Balances
(*) SMM, CPR, PSA Figures Exclude Liquidated Balances









Page 16 of 24
IndyMac Residential Asset Securitization Trust 2003-A9

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
May 25, 2007 Distribution







PREPAYMENT CALCULATION METHODOLOGY - Excluding Liquidated Balances

Single Monthly Mortality (SMM): (Voluntary partial and full prepayments + Repurchases)/(Beg Principal Balance - Sched Principal)

Conditional Prepayment Rate (CPR): 1-((1-SMM)^12)
PSA Standard Prepayment Model: CPR/(0.20%*min(30,WAS))
PSA Standard Prepayment Model: CPR/(0.20%*min(30,WAS))
Average SMM over period between nth month and mth month (AvgSMMn,m): 1 - [(1-SMMn)(1-SMMn+1)...*(1-SMMm)]^(1/months in period n,m)
Average CPR over period between the nth month and mth month (AvgCPRn,m): 1-((1-AvgSMMn,m)^12)

Average PSA Approximation over period between the nth month and mth month: AvgCPRn,m/(0.20%*Avg WASn,m))
Average WASn,m: (min(30,WASn)+min(30,WASn+1)+...+min(30,WASm)/(number of months in the period n,m)

Weighted Average Seasoning (WAS)

Note: Prepayment rates are calculated since deal issue date and include partial and full voluntary prepayments and repurchases.
Dates correspond to distribution dates.



Page 17 of 24
IndyMac Residential Asset Securitization Trust 2003-A9

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
May 25, 2007 Distribution

Prepayment Detail Report

Prepayment Detail Report - Mortgage Loans Prepaid in Full During Current Distribution


Loan Number		Original			Current	State &	Type Prepayment	First


&	Loan	Principal	Prepayment	Prepayment	Note	LTV at	&	Payment

Loan Group	Status	Balance	Amount	Date	Rate	Origination	Original Term	Date

2427270 1		215,000.00	203,994.71	26-Apr-2007	5.875%	NY - 46.74%	Paid Off - 360	01-Aug-2003
2427270 1		215,000.00	203,994.71	26-Apr-2007	5.875%	NY - 46.74%	Paid Off - 360	01-Aug-2003
2446698 1		400,000.00	379,462.53	11-May-2007	6.000%	CA - 69.20%	Paid Off - 360	01-Jul-2003
4044779 1		175,700.00	166,897.81	15-May-2007	6.000%	CA - 70.00%	Paid Off - 360	01-Aug-2003
4057712 1		317,750.00	302,171.49	17-Apr-2007	6.125%	CA - 37.38%	Paid Off - 360	01-Aug-2003


TOTAL	1,108,450.00	1,052,526.54

Page 18 of 24
IndyMac Residential Asset Securitization Trust 2003-A9

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
May 25, 2007 Distribution

Realized Loss Report

COLLATERAL REALIZED LOSSES


								Total


Current





	Number of Loans Liquidated								0

	Collateral Principal Realized Loss/(Gain) Amount								0.00
	Collateral Interest Realized Loss/(Gain) Amount								0.00
Net Liquidation Proceeds								0.00

Cumulative




	Number of Loans Liquidated								2

	Collateral Realized Loss/(Gain) Amount								189,683.31
Net Liquidation Proceeds								518,405.29



	Special Hazard Loss Coverage Amt								4,066,039.36
	Fraud Loss Coverage Amt								1,402,570.73
	Bankrupt Loss Coverage Amt								100,000.00

	Class B-1 Writedown Amount								0.00
	Class B-2 Writedown Amount								0.00
	Class B-3 Writedown Amount								0.00
	Class B-4 Writedown Amount								0.00
	Class B-5 Writedown Amount								0.00
	Class B-6 Writedown Amount								0.00









Page 19 of 24
IndyMac Residential Asset Securitization Trust 2003-A9

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
May 25, 2007 Distribution


DEFAULT SPEEDS
DEFAULT SPEEDS
								Total




MDR								0.00%
3 Months Avg MDR								0.00%
12 Months Avg MDR								0.02%
Avg MDR Since Cut-off								0.01%


CDR								0.00%
3 Months Avg CDR								0.00%
12 Months Avg CDR								0.28%
Avg CDR Since Cut-off								0.12%


SDA								0.00%
3 Months Avg SDA Approximation								0.00%
12 Months Avg SDA Approximation								46.71%
Avg SDA Since Cut-off Approximation								24.62%


Principal Only Loss Severity Approx for Current Period								0.00%
3 Months Avg Loss Severity Approximation								0.00%
12 Months Avg Loss Severity Approximation								0.11%
Avg Loss Severity Approximation Since Cut-Off								26.87%


Principal & Interest Loss Severity Approx for Current Period								0.00%
3 Months Avg Loss Severity Approximation								0.00%
12 Months Avg Loss Severity Approximation								0.11%
Avg Loss Severity Approximation Since Cut-Off								26.76%








Page 20 of 24
IndyMac Residential Asset Securitization Trust 2003-A9

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
May 25, 2007 Distribution







COLLATERAL REALIZED LOSS CALCULATION METHODOLOGY
Monthly Default Rate (MDR): (Beg Principal Balance of Liquidated Loans)/(Total Beg Principal Balance)

Conditional Default Rate (CDR): 1-((1-MDR)^12)

SDA Standard Default Assumption: CDR/IF(WAS<61,MIN(30,WAS)0.02%,MAX(0.03%,MIN(30,WAS)0.02%-0.0095%*(WAS-60)))
Average MDR over period between nth month and mth month (AvgMDRn,m): [(1-MDRn)(1-MDRn+1)...*(1-MDRm)]^(1/months in period n,m)
Average CDR over period between the nth month and mth month (AvgCDRn,m): 1-((1-AvgMDRn,m)^12)
Average SDA Approximation over period between the nth month and mth month:
AvgCDRn,m/IF(Avg WASn,m<61,MIN(30,Avg WASn,m)0.02%,MAX(0.03%,MIN(30,Avg WASn,m)0.02%-0.0095%*(Avg WASn,m-60)))

Average WASn,m: (WASn + WASn+1 +...+ WASm )/(number of months in the period n,m)
Principal Only Loss Severity Approximation for current period:
Sum(Principal Realized Loss Amount)/sum(Beg Principal Balance of Liquidated Loans)
Principal & Interest Loss Severity Approximation for current period:
Sum(Principal & Interest Realized Loss Amount)/sum(Beg Principal Balance of Liquidated Loans)

Average Loss Severity Approximation over period between nth month and mth month:

Sum(Realized Loss Amount)/sum(Beg Principal Balance of Liquidated Loans for months in the period n,m
Note: Default rates are calculated since deal issue date and include realized gains and additional realized losses and gains from prior periods.
Dates correspond to distribution dates.
All Realized Losses in excess of Principal Balance are treated as Interest Realized Losses.



Page 21 of 24
IndyMac Residential Asset Securitization Trust 2003-A9

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
May 25, 2007 Distribution

Realized Loss Detail Report
Loan Number	Current	State &		Prior	Realized		Cumulative
							Cumulative
&	Loan	Note	LTV at	Original	Principal	Loss/(Gain)	Realized	Realized

Loan Group	Status	Rate	Origination	Term	Balance	Revision	Loss/(Gain)	Loss/(Gain)
Loan Group	Status	Rate	Origination	Term	Balance	Revision	Loss/(Gain)	Loss/(Gain)




TOTAL



Page 22 of 24
IndyMac Residential Asset Securitization Trust 2003-A9

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
May 25, 2007 Distribution

Triggers and Adj. Cert. Report
TRIGGER EVENTS
TRIGGER EVENTS
						Total
		Has Optional Termination Date Reached				No
		Has Sr. Prepay Stepdown Condition Occurred				Yes
		Has Sr. Credit Supp. Depletion Date Occured				No
		Has Special Haz. Cov. Term Date Occured				No
		Has Fraud Loss Coverage Term Date Occured				No
		Has BK Loss Cov. Term Date Occured				No




ADJUSTABLE RATE CERTIFICATE INFORMATION

SPACE INTENTIONALLY LEFT BLANK




ADDITIONAL INFORMATION
ADDITIONAL INFORMATION
							Total
Current Senior Percentage							90.069145%
Next Senior Percentage							89.981184%
Current Subordinate Percentage							9.930855%
Next Subordinate Percentage							10.018816%
Senior Prepayment Percentage							100.000000%
Next Senior Prepayment Percentage							100.000000%
Subordinate Prepayment Percentage							0.000000%
Next Subordinate Prepayment Percentage							0.000000%
Current LIBOR Rate							5.320000%
Next LIBOR Rate							5.32%



Page 23 of 24
IndyMac Residential Asset Securitization Trust 2003-A9

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
May 25, 2007 Distribution

Other Related Information
ADDITIONAL INFORMATION
ADDITIONAL INFORMATION
							Total
Current Scheduled Payments							776,782.11
Current Scheduled Payments 1 Month Prior							785,638.78
Current Scheduled Payments 2 Month Prior							797,605.04
Current Scheduled Payments 3 Month Prior							804,634.65
Current Scheduled Payments 4 Month Prior							816,406.66
Current Scheduled Payments 5 Month Prior							829,714.28
Current Scheduled Payments 6 Month Prior							843,947.41
Current Scheduled Payments 7 Month Prior							857,170.89
Current Scheduled Payments 8 Month Prior							866,382.39
Current Scheduled Payments 9 Month Prior							871,086.07
Current Scheduled Payments 10 Month Prior							878,031.41
Current Scheduled Payments 11 Month Prior							885,092.66



Delinquent 60+ Scheduled Payments							14,138.12
Delinq. 60+ Sched. Pmnts, 1 Month Prior							13,158.23
Delinq. 60+ Sched. Pmnts, 2 Month Prior							17,352.59
Delinq. 60+ Sched. Pmnts, 3 Month Prior							18,506.10
Delinq. 60+ Sched. Pmnts, 4 Month Prior							16,372.69
Delinq. 60+ Sched. Pmnts, 5 Month Prior							12,298.57
Delinq. 60+ Sched. Pmnts, 6 Month Prior							11,145.06
Delinq. 60+ Sched. Pmnts, 7 Month Prior							11,519.08
Delinq. 60+ Sched. Pmnts, 8 Month Prior							17,733.58
Delinq. 60+ Sched. Pmnts, 9 Month Prior							15,531.72
Delinq. 60+ Sched. Pmnts, 10 Month Prior							6,878.04
Delinq. 60+ Sched. Pmnts, 11 Month Prior							10,408.98





Page 24 of 24

INDYMAC MBS INC RESIDENTIAL ASSET SEC TRUST 2004 R1 8-K