BMW introduced the 528 variant of their E12 5 Series for the 1975 model year. The 528 was fitted with BMW's M30B28V engine, with the 'V' standing for Vergaser, which means carburetor in German. This 2.8L inline six engine was initially fitted with dual Zenith carburetors, which produced 162hp, but in 1976, BMW began using a single Solex carburetor which raised the engine's power rating to 168hp. This series of cars were only available as sedans, and were offered with a manual or automatic transmissions which sent power to the rear wheels. Production of the E12 528 ended in 1978, when the model series was discontinued.