Exhibit 15.3

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in the Registration Statements on Form S-8 (File No. 333-251453) and Form F-3 (File No. 333-258378) of Li Auto Inc. of our report dated April 10, 2026 relating to the financial statements and the effectiveness of internal control over financial reporting, which appears in this Form 20-F.

​