Cover Page - USD ($)	12 Months Ended
	Dec. 31, 2024	Feb. 14, 2025	Jun. 30, 2024
Cover [Abstract]
Document Type	10-K/A
Document Annual Report	true
Document Period End Date	Dec. 31, 2024
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity File Number	001-36449
Entity Registrant Name	TRUECAR, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	04-3807511
Entity Address, Address Line One	225 Santa Monica Blvd
Entity Address, Address Line Two	12th Floor
Entity Address, City or Town	Santa Monica
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	90401
City Area Code	800
Local Phone Number	200‑2000
Title of 12(b) Security	Common Stock, par value $0.0001 per share
Trading Symbol	TRUE
Security Exchange Name	NASDAQ
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Document Financial Statement Error Correction [Flag]	false
Entity Shell Company	false
Entity Public Float			$ 282,455,081
Entity Common Stock, Shares Outstanding		87,256,034
Documents Incorporated by Reference	None.
Amendment Description	This Amendment No. 1 on Form 10-K/A (this “Amendment No. 1”) to the Annual Report on Form 10-K of TrueCar, Inc. (the “Company”) for the fiscal year ended December 31, 2024, originally filed with the U.S. Securities and Exchange Commission (the “SEC”) on February 19, 2025 (the “Original Filing”) is being filed solely to correct a typographical error contained in Part II, Item 8 of the Original Filing to correct the signing date of the Report of Independent Registered Public Accounting Firm.
Entity Central Index Key	0001327318
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	FY
Amendment Flag	true