BMW B37 Engine (2014)

Available from 2014, the BMW B37 was a three-cylinder turbo-diesel engine. The B37 was a part of BMW’s modular family of engines which included the four-cylinder B47 diesel engine, the three-cylinder B38 petrol and the four-cylinder B48 petrol engines. For three- and four-cylinder engines of the same fuel type, around 60 per cent of components were shared; for engines of different fuel types, around 40 per cent of components were shared. All four engines were manufactured on a single assembly line at BMW’s Steyr plant in Austria and production was estimated at 5500 engines per day.

The B37 engine had an aluminium block and cylinder head, a single-scroll Bosch Mahle Turbo Systems (BMTS) BV065 turbocharger with variable turbine geometry (VTG or VGT), common-rail direct injection (providing maximum injection pressure of 2000 bar), double overhead camshafts (chain-driven), four valves per cylinder and a compression ratio of 16.5:1.