Statement to Securityholder

Ally Auto Receivables Trust 2017-4



Distribution Information	Deal Information

1. Distribution Summary	Deal:	Ally Auto Receivables Trust 2017-4

2. Factor Summary	Asset Type:	Consumer Retail

3. Interest Summary	Closing Date:	8/23/2017

4. Collections and Distributions	Bloomberg Ticker:	ALLYA 2017-4

5. Collateral Summary	Collection Period, Begin:	9/1/2020
	Collection Period, End:	9/30/2020
6. Charge-Off and Delinquency Rates	Determination Date:	10/13/2020
	Distribution Date:	10/15/2020
7. Credit Instruments
	ABS Investor Relations - Ally Bank as Servicer:
8. Performance Tests	Telephone:	(866) 710-4623
	E-Mail:	securitization@ally.com
9. Asset Representations Delinquency Triggers

10. Supplemental Disclosures

The Class B Notes, the Class C Notes, and the Class D Notes have not been registered under the United States Securities Act of 1933, as amended (the "Securities Act"), or

the securities laws of any other jurisdiction. The Class B Notes, the Class C Notes, and the Class D Notes are not transferable, other than to a qualified institutional buyer (as

defined in Rule 144A) or pursuant to another exemption under the Securities Act, and subject to satisfaction of certain other provisions of the Indenture.

During the January 2020 Collection Period the Servicer successfully converted to a new servicing and accounting technology platform for over four million customers, including the Obligors related to the Receivables and activity disclosed in this Statement to Securityholder. The information in this Statement to Securityholder reflects Collection Period activity as impacted by the servicing and accounting technology platform conversion, including the ongoing resolution of a limited conversion backlog with respect to certain servicing activities and the implementation of certain information technology coding changes.

During the March 2020 Collection Period the Servicer announced programs to support customers, employees, and communities during the COVID-19 pandemic, including a program that allows consumer automotive customers to defer their payments for up to 120 days (the “Consumer Automotive Support Program”). A significant number of our consumer automotive customers have enrolled in the Consumer Automotive Support Program.

Page 1 of 8

Statement to Securityholder

Ally Auto Receivables Trust 2017-4

1. Distribution Summary



Class	CUSIP	Initial Note	Beginning Note	Note Rate	Principal	Interest	Pass Through	Total	Principal	Interest	Ending Note
		Principal Balance	Principal Balance		Distribution	Distribution	Distribution	Distribution	Carryover Shortfall	Carryover Shortfall	Principal Balance
								(3) + (4) + (5) = (6)			(1) - (3) - (7) = (9)
			(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)	(9)
A-1	02007FAA3	280,000,000.00	0.00	1.35000000	0.00	0.00	N/A	0.00	0.00	0.00	0.00
A-2	02007FAB1	337,000,000.00	0.00	1.59000000	0.00	0.00	N/A	0.00	0.00	0.00	0.00
A-3	02007FAC9	337,000,000.00	17,015,051.85	1.75000000	12,989,321.03	24,813.62	N/A	13,014,134.65	0.00	0.00	4,025,730.82
A-4	02007FAD7	91,830,000.00	91,830,000.00	1.96000000	0.00	149,989.00	N/A	149,989.00	0.00	0.00	91,830,000.00
B	02007FAE5	23,270,000.00	23,270,000.00	2.23000000	0.00	43,243.42	N/A	43,243.42	0.00	0.00	23,270,000.00
C	02007FAF2	19,390,000.00	19,390,000.00	2.43000000	0.00	39,264.75	N/A	39,264.75	0.00	0.00	19,390,000.00
D	02007FAG0	14,400,000.00	14,400,000.00	2.93000000	0.00	35,160.00	N/A	35,160.00	0.00	0.00	14,400,000.00
Certificates	N/A	N/A	N/A	N/A	N/A	N/A	505,179.52	505,179.52	N/A	N/A	N/A
Deal Totals		1,102,890,000.00	165,905,051.85		12,989,321.03	292,470.79	505,179.52	13,786,971.34	0.00	0.00	152,915,730.82

Page 2 of 8

Statement to Securityholder

Ally Auto Receivables Trust 2017-4

2. Factor Summary

(Amount per $1,000 of Original Principal)



Class	Beginning Note Pool Factor	Principal Distribution Factor	Interest Distribution Factor	Total Distribution Factor	Interest Carryover Shortfall Factor	Ending Note Pool Factor

A-1	0.0000000	0.0000000	0.0000000	0.0000000	0.0000000	0.0000000
A-2	0.0000000	0.0000000	0.0000000	0.0000000	0.0000000	0.0000000
A-3	50.4897681	38.5439793	0.0736309	38.6176102	0.0000000	11.9457888
A-4	1,000.0000000	0.0000000	1.6333333	1.6333333	0.0000000	1,000.0000000
B	1,000.0000000	0.0000000	1.8583335	1.8583335	0.0000000	1,000.0000000
C	1,000.0000000	0.0000000	2.0250000	2.0250000	0.0000000	1,000.0000000
D	1,000.0000000	0.0000000	2.4416667	2.4416667	0.0000000	1,000.0000000



Beginning Aggregate Note Pool Factor:	150.4275602
Ending Aggregate Note Pool Factor:	138.6500293

Beginning Reserve Account Balance Factor:	1,000.0000000
Reserve Account Draw, distributed to Noteholders, Factor:	0.0000000
Reserve Account Draw, distributed to Certificateholders, Factor:	0.0000000
Ending Reserve Account Balance Factor:	1,000.0000000

Page 3 of 8

Statement to Securityholder

Ally Auto Receivables Trust 2017-4

3. Interest Summary

A. Target Interest Summary

Class

Beginning Note Principal Balance

Interest Accrual Period, Start

Interest Accrual Period, End

Accrual Methodology

Applicable Index

Margin

Fixed

Note Rate

Target Interest Distribution

A-1

0.00

9/15/2020

10/14/2020

Actual/360

N/A

1.35000000

0.00

A-2

0.00

9/15/2020

10/14/2020

30/360

N/A

1.59000000

0.00

A-3

17,015,051.85

9/15/2020

10/14/2020

30/360

N/A

1.75000000

24,813.62

A-4

91,830,000.00

9/15/2020

10/14/2020

30/360

N/A

1.96000000

149,989.00

23,270,000.00

9/15/2020

10/14/2020

30/360

N/A

2.23000000

43,243.42

19,390,000.00

9/15/2020

10/14/2020

30/360

N/A

2.43000000

39,264.75

14,400,000.00

9/15/2020

10/14/2020

30/360

N/A

2.93000000

35,160.00

B. Interest Payment Amount Summary



Class	Beginning Unpaid Interest Carryover Shortfall	Target Interest Distribution	Interest Shortfall Amount Allocated/(Repaid)	Actual Interest Distribution (2) - (3) = (4)	Remaining Unpaid Interest Carryover Shortfall (1) + (3) = (5)
	(1)	(2)	(3)	(4)	(5)
A-1	0.00	0.00	0.00	0.00	0.00
A-2	0.00	0.00	0.00	0.00	0.00
A-3	0.00	24,813.62	0.00	24,813.62	0.00
A-4	0.00	149,989.00	0.00	149,989.00	0.00
B	0.00	43,243.42	0.00	43,243.42	0.00
C	0.00	39,264.75	0.00	39,264.75	0.00
D	0.00	35,160.00	0.00	35,160.00	0.00
Deal Totals	0.00	292,470.79	0.00	292,470.79	0.00

Page 4 of 8

Statement to Securityholder

Ally Auto Receivables Trust 2017-4

4. Collections and Distributions



Collections
Receipts During the Period	13,570,794.02
Administrative Purchase Payments	157,432.99
Warranty Payments	0.00
Liquidation Proceeds Including Recoveries (Net of Liquidation Expenses)	210,500.42
Other Fees or Expenses Paid	0.00
Total Collections	13,938,727.43

Beginning Reserve Account Balance	2,769,665.19
Total Available Amount	16,708,392.62

Distributions
Total Available Amount	16,708,392.62
Basic Servicing Fee	150,256.09
Amounts owing to the Asset Representations Reviewer, Indenture Trustee, and Vote Tabulation Agent in connection with an Asset Representations Review	0.00
Aggregate Class A Interest Distributable Amount	174,802.62
First Priority Principal Distributable Amount	0.00
Aggregate Class B Interest Distributable Amount	43,243.42
Second Priority Principal Distributable Amount	0.00
Aggregate Class C Interest Distributable Amount	39,264.75
Third Priority Principal Distributable Amount	0.00
Aggregate Class D Interest Distributable Amount	35,160.00
Fourth Priority Principal Distributable Amount	0.00
Reserve Account Deposit	2,769,665.19
Noteholders' Regular Principal Distributable Amount	12,989,321.03
Indenture Trustee expenses	0.00
Unpaid Fees due to Owner Trustee, Indenture Trustee, Administrator and Asset Representations Reviewer	1,500.00
Excess Total Available Amount to the Certificateholders	505,179.52

Supplemental Servicing Fees	32,202.24
Other Fees or Expenses Accrued	0.00
Liquidation Expenses	7,500.00

Page 5 of 8

Statement to Securityholder

Ally Auto Receivables Trust 2017-4

5. Collateral Summary

A. Balances



		Original Balance	Beginning Balance	Ending Balance
Deal Totals	Number of Receivables	70,003	24,938	23,824
	Aggregate Receivables Principal Balance	1,107,866,076.72	180,307,310.85	167,317,989.82
	Aggregate Amount Financed	1,107,866,076.72	180,307,310.85	167,317,989.82

There have been no receivables with respect to which material breaches of pool asset representations or warranties or transaction covenants have occurred.

B. Pool Composition - Weighted Averages

Inception

Beginning

Ending

Inception

Beginning

Ending

Inception

Beginning

Ending

Weighted

Average

Coupon

Original

Remaining

Maturity

Deal Totals

5.61000000

6.21095048

6.24646678

65.59

68.49

68.62

52.30

24.85

24.17

C. Pool Composition - Prepayments



Month	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20
Monthly	1.30%	1.18%	1.30%	1.21%	1.11%	1.33%	1.12%	1.40%	1.28%	1.22%	1.19%	1.23%	1.28%	0.99%	1.23%	1.09%	1.14%	1.17%	1.07%	1.17%

Month	21	22	23	24	25	26	27	28	29	30	31	32	33	34	35	36	37	38	39	40
Monthly	1.27%	1.25%	1.03%	1.27%	1.21%	1.17%	1.21%	1.07%	1.19%	1.09%	1.04%	1.12%	0.75%	0.83%	0.94%	1.04%	1.12%	1.13%

Month	41	42	43	44	45	46	47	48	49	50	51	52	53	54	55	56	57	58	59	60
Monthly

Page 6 of 8

Statement to Securityholder

Ally Auto Receivables Trust 2017-4

6. Charge-Off and Delinquency Rates

A. Current



	Charge-Off Rate						Delinquency Rate
	Average Aggregate Amount Financed	Number of Units Charged-Off	Net Charge-Offs	Average Net Charge-Offs	Loss Rate		Total Accounts	Accounts over 60	Percent Delinquent
Current	173,812,650.34	25	21,373.20	854.93	0.1476	%	23,824	111	0.4659	%
Preceding	187,052,559.01	25	26,369.92	1,054.80	0.1692	%	24,938	83	0.3328	%
Next Preceding	200,565,161.70	29	82,125.80	2,831.92	0.4914	%	26,052	64	0.2457	%
Third Preceding	214,019,428.82	22	44,383.75	2,017.44	0.2489	%	Three Month Average		0.3481	%
Four Month Average					0.2643	%

B. Cumulative



	Aggregate Amount	Cumulative Net	Cumulative Loss Rate		Delinquency	Total	Total Balance	Percent
	Financed	Charge-Offs			Stratification	Accounts		Delinquent
Totals	1,107,866,076.72	8,882,261.37	0.8017	%	31 - 60 days	283	2,663,947.86	1.5921	%
The information contained in this report is defined or determined in a manner consistent with the prospectus for Ally Auto Receivables					61 - 90 days	85	830,344.86	0.4963	%
Trust 2017-4 related to delinquencies, charge-offs or uncollectible accounts.					91 - 120 days	24	194,731.19	0.1164	%
					> 120 days	2	26,376.37	0.0158	%
There have been no material changes in determining delinquencies, charge-offs or uncollectible amounts.

					Bankruptcies		Total Accounts	Total Balance
					Prior Period¹		346	2,942,631.95
					Additions		5	65,254.51
1. Total Balance for Prior Period reflects the aggregate balance as of the last day of the related Collection Period.					Removals²		16	111,037.57
2. Removals include bankruptcies returned to active status, bankruptcies paid-in-full, and charge-offs on prior period bankruptcies.					Ending Inventory		335	2,896,848.89

7. Credit Instruments

A. Reserve Accounts

Account

Initial Balance

Beginning Balance

ADDITIONS

REDUCTIONS

Ending Balance

Specified Reserve

Account Balance

Draws

Releases

Cash Reserve

2,769,665.19

0.00

2,769,665.19

Page 7 of 8

Statement to Securityholder

Ally Auto Receivables Trust 2017-4

8. Performance Tests



Event of Default	All Tests Passed
Servicer Default	All Tests Passed
Asset Representations Review Delinquency Trigger	PASS
Overcollateralization Target reached?	YES
Initial Overcollateralization	4,976,076.72
Current Overcollateralization	14,402,259.00
Overcollateralization Target	14,402,259.00

9. Asset Representations Delinquency Triggers



Period	1		2		3		4		5		6		7		8		9		10		11		12		13		14		15		16		17		18		19		20
Trigger Level	1.25	%	1.25	%	1.25	%	1.25	%	1.25	%	1.25	%	1.25	%	1.25	%	1.25	%	1.25	%	1.25	%	1.25	%	1.60	%	1.60	%	1.60	%	1.60	%	1.60	%	1.60	%	1.60	%	1.60	%
61+ Delinquencies	0.02	%	0.13	%	0.17	%	0.22	%	0.26	%	0.26	%	0.25	%	0.19	%	0.23	%	0.28	%	0.32	%	0.31	%	0.31	%	0.37	%	0.37	%	0.41	%	0.46	%	0.50	%	0.40	%	0.34	%

Period	21		22		23		24		25		26		27		28		29		30		31		32		33		34		35		36		37		38		39		40
Trigger Level	1.60	%	1.60	%	1.60	%	1.60	%	1.80	%	1.80	%	1.80	%	1.80	%	1.80	%	1.80	%	1.80	%	1.80	%	1.80	%	1.80	%	1.80	%	1.80	%	2.25	%	2.25	%	2.25	%	2.25	%
61+ Delinquencies	0.36	%	0.34	%	0.42	%	0.50	%	0.52	%	0.59	%	0.60	%	0.61	%	0.69	%	0.75	%	0.65	%	0.46	%	0.27	%	0.17	%	0.16	%	0.23	%	0.39	%	0.63	%

Period	41		42		43		44		45		46		47		48		49		50		51		52		53		54		55		56		57		58		59		60
Trigger Level	2.25	%	2.25	%	2.25	%	2.25	%	2.25	%	2.25	%	2.25	%	2.25	%	2.25	%	2.25	%	2.25	%	2.25	%	2.25	%	2.25	%	2.25	%	2.25	%	2.25	%	2.25	%	2.25	%	2.25	%
61+ Delinquencies

10. Supplemental Disclosures



Number of Receivables extended during the current Collection Period	131

Other than as disclosed above in Section 10 of this Statement to Securityholder, there have been no material modifications, extensions, or waivers relating to the terms of or fees, penalties or payments on, pool assets during the distribution period or that, cumulatively, have become material over time.

This Servicer Certificate relates only to AART 2017-4. This Servicer Certificate should not be relied upon with respect to any other security. The information contained herein is only an indication of past performance and does not predict how AART 2017-4 will perform in the future.

Page 8 of 8

Ally Auto Receivables Trust 2017-4 10-D