The BMW 1 Series M Coupé (also known as BMW 1M Coupé) is a high-performance variation of the BMW 135i Coupé. Unlike previous M cars, it boasts a twin-turbo N54 engine which is also used by the BMW Z4 sDrive35is. Its name differs from the M nomenclature to avoid confusion with the BMW M1. The car was originally planned as a limited run of 2,700 units but due to customer demand, the plan was scrapped and by the end of production in June 2012, a total of 6,331 units were produced.