v3.26.1
Document And Entity Information - USD ($)
 12 Months Ended
Mar. 31, 2026
Jun. 01, 2026
Sep. 30, 2025
Document Information Line Items      
Entity Central Index Key 0000918251    
Document Type 10-K    
Document Annual Report true    
Current Fiscal Year End Date --03-31    
Document Period End Date Mar. 31, 2026    
Document Fiscal Year Focus 2026    
Document Transition Report false    
Entity File Number 001-33861    
Entity Registrant Name MOTORCAR PARTS OF AMERICA, INC.    
Entity Incorporation, State or Country Code NY    
Entity Tax Identification Number 11-2153962    
Entity Address, Address Line One 2929 California Street    
Entity Address, City or Town Torrance    
Entity Address, State or Province CA    
Entity Address, Postal Zip Code 90503    
City Area Code 310    
Local Phone Number 212-7910    
Title of 12(b) Security Common Stock, par value $0.01 per share    
Trading Symbol MPAA    
Security Exchange Name NASDAQ    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Interactive Data Current Yes    
Entity Current Reporting Status Yes    
Entity Filer Category Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag false    
Document Financial Statement Error Correction [Flag] false    
Entity Shell Company false    
Entity Public Float     $ 300,342,000
Entity Common Stock, Shares Outstanding   18,924,818  
Auditor Firm ID 42    
Auditor Name Ernst & Young LLP    
Auditor Location Los Angeles, California    
Amendment Flag false    
Document Fiscal Period Focus FY