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Company Background and Organization	12 Months Ended
	Mar. 31, 2018
Company Background and Organization [Abstract]
Company Background and Organization	1. Company Background and Organization Overview Motorcar Parts of America, Inc. and its subsidiaries (the “Company”, or “MPA”) is a leading manufacturer, remanufacturer, and distributor of aftermarket automotive and light truck applications. The Company also, to a lesser extent, is a manufacturer, remanufacturer, and distributor of heavy duty truck and industrial and agricultural application parts. These replacement parts are sold for use on vehicles after initial vehicle purchase. These automotive parts are sold to automotive retail chain stores and warehouse distributors throughout North America and to major automobile manufacturers for both their aftermarket programs and warranty replacement programs (“OES”). The Company’s products include (i) rotating electrical products such as alternators and starters, (ii) wheel hub assemblies and bearings, (iii) brake master cylinders, and (iv) other products which include turbochargers, brake power boosters, and diagnostic equipment. The Company added turbochargers through an acquisition in July 2016. The Company began selling brake power boosters in August 2016. As a result of an acquisition in July 2017, its business also now includes developing and selling diagnostic equipment for alternators, starters, belt-start generators (stop start and hybrid technology), and electric power trains for electric vehicles. The Company obtains used automotive parts, commonly known as Used Cores, primarily from its customers under the Company’s core exchange program. It also purchases Used Cores from vendors (core brokers). The customers grant credit to the consumer when the used part is returned to them, and the Company in turn provides a credit to the customers upon return to the Company. These Used Cores are an essential material needed for the remanufacturing operations. The Company has remanufacturing, warehousing and shipping/receiving operations for automotive parts in North America and Asia. In addition, the Company utilizes various third party warehouse distribution centers in North America.

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- Definition

The entire disclosure for the nature of an entity's business, major products or services, principal markets including location, and the relative importance of its operations in each business and the basis for the determination, including but not limited to, assets, revenues, or earnings. For an entity that has not commenced principal operations, disclosures about the risks and uncertainties related to the activities in which the entity is currently engaged and an understanding of what those activities are being directed toward.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-URI http://asc.fasb.org/topic&trid=2134479

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