Cover Page - shares	3 Months Ended
	Mar. 31, 2024	May 01, 2024
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2024
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
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Title of 12(b) Security	Common Stock, par value $0.0001 per share
Trading Symbol	TRUE
Security Exchange Name	NASDAQ
Entity Common Stock, Shares Outstanding		91,668,140
Entity Central Index Key	0001327318
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q1
Amendment Flag	false