UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER

PURSUANT TO RULE 13a-16 OR 15d-16

UNDER THE SECURITIES EXCHANGE ACT OF 1934

For the month of September, 2025

Commission File Number: 001-42851

China Automotive Systems, Inc.

(Exact Name of Registrant as Specified in its Charter)

No. 1 Henglong Road, Yu Qiao Development Zone

Shashi District, Jing Zhou City, Hubei Province

The People’s Republic of China

(Address of principal executive offices)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F:

Form 20-F x Form 40-F ¨

Changes in Registrant’s Certifying Accountant

The Audit Committee (the “Committee”) of the Board of Directors of China Automotive Systems, Inc. (the “Company”) recently conducted a selection process to determine the Company’s independent registered public accounting firm for the fiscal year ending December 31, 2025. Upon completion of this process, the Committee approved (i) the dismissal of PricewaterhouseCoopers Zhong Tian LLP (“PwC”), effective September 17, 2025, and (ii) the engagement of Grant Thornton Zhitong Certified Public Accountants LLP (“Grant Thornton”), effective September 17, 2025 to serve as the Company’s independent registered public accounting firm for the fiscal year ending December 31, 2025.

The audit reports of PwC on the consolidated financial statements of the Company for the fiscal years ended December 31, 2023 and December 31, 2024, did not contain an adverse opinion or a disclaimer of opinion, nor were they qualified or modified as to uncertainty, audit scope, or accounting principles.

During the fiscal years ended December 31, 2023 and December 31, 2024, and the subsequent interim period through September 17, 2025, there were no: (i) “disagreements” (within the meaning of Item 16F(a)(1)(iv) of Form 20-F and related instructions) between the Company and PwC on any matter of accounting principles or practices, financial statement disclosure, or auditing scope or procedures, which disagreements, if not resolved to PwC’s satisfaction, would have caused them to make reference in connection with their audit reports to the subject matter of the disagreement; or (ii) “reportable events” (as defined in Item 16F(a)(1)(v)(A) through (D) of Form 20-F).

The Company has provided a copy of the foregoing disclosures to PwC and requested that PwC furnish it with a letter addressed to the Securities and Exchange Commission stating whether PwC agrees with the above statements. A copy of PwC’s letter, dated September 18, 2025, is filed as Exhibit 16.1 to this Current Report on Form 6-K.

During the fiscal years ended December 31, 2023 and December 31, 2024 and the subsequent interim period through the date of this Current Report on Form 6-K, neither the Company nor anyone on the Company’s behalf consulted with Grant Thornton regarding any of the matters set forth in Item 16F(a)(2) of Form 20-F.

The Company intends to use this current report on Form 6-K and the accompanying exhibit to satisfy its reporting obligations under Item 16F of its annual report on Form 20-F for the year ending December 31, 2025 to the extent provided in and permitted by Paragraph 2 of the Instructions to Item 16F of Form 20-F and plans to incorporate Exhibit 16.1 by reference into such Form 20-F to the extent necessary to satisfy such reporting obligations.

The foregoing shall be deemed to be incorporated by reference into the registration statements on Form F-4 (File No.: 333-288447) and Form S-8 (File No. 333-126959) of the Company, filed with the U.S. Securities and Exchange Commission, and to be a part thereof from the date on which this report is furnished, to the extent not superseded by documents or reports subsequently filed or furnished.

Item 9.01

Financial Statements and Exhibits

(d)

Exhibits

EXHIBIT INDEX

Exhibit		Title

16.1		Letter from PricewaterhouseCoopers Zhong Tian LLP to the Securities and Exchange Commission dated September 18, 2025

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, thereunto duly authorized.

	China Automotive Systems, Inc.

Date: September 18, 2025	By:	/s/ Hanlin Chen
	Name:	Hanlin Chen
	Title:	Chairman

China Automotive Systems, Inc. 6-K