Manual

The M30B35LE is a SOHC, two-valve, lower efficiency variant of the M88/1 engine, commonly referred to as the M90. The cylinder head is taken from the BMW M30 engine family, but it shares the same block, bore, and stroke as the M88. This engine has used both Bosch Motronic and Bosch L-Jetronic engine management systems […]

The M30B34 engines with a 10.0:1 compression ratio and 160 kW (218 horsepower) were sold in Europe and the majority of other markets. The M30B34 produced 136 kW (185 hp) and had an 8.0:1 compression ratio in North America and Japan. The Bosch Motronic digital fuel injection system was used in every market. The stroke […]

In 1990, the M50B20 engine—the smallest inline 6-cylinder engine in the BMW M50 series, which also included the M50B24, M50B25, S50B30, and S50B32—was introduced to replace the outdated M20B20. This new cast-iron cylinder block has oil nozzles; the height has changed to 210 mm, but the inter-cylinder distance is still 91 mm. This block contains […]

In 1990, BMW replaced its inline 6-cylinder M20B25 engine with a new, far more potent and sophisticated M50B25. The device is a member of the new M50 family, which also includes the M50B20, M50B24, S50B30, and S50B32. The cylinder head is the primary distinction between M50 and M20 engines. The new engine has 24 valves, […]

In 1994, the well-liked M50B20 engine was replaced by the M52B20. This is the first engine in the new M52 family of inline 6-cylinder engines, which also includes the M52B24, M52B25, M52B28, and S52B32. The new engine’s lightweight aluminum cylinder block has new pistons, connecting rods, and nickel-plated cylinders. The M52B20 connecting rod is 145 […]

Introduced in 1995, the BMW M52B25 engine from the M52 family (which also included the M52B20, M52B24, M52B28, and S52B32) was intended to replace the 2.5-liter M50 representative. The bottom’s geometry stayed the same, but the pistons and connecting rods were modified, and the cast-iron block was swapped out for a lightweight aluminum cylinder coated […]

The M52B28 engine, which debuted in 1995, is the senior member of the M52 family, which also consists of the M52B20, M52B24, M52B25, and S52B32. In North America, the engine block is made of cast iron; in Europe, it is made of nickel-plated aluminum. The engine’s dimensions are square (84 x 84 mm), the cylinder […]

The M54B22, the junior engine in the M54 series (which also includes the M54B25, M54B30, and S54B32), is an evolution of the M52TUB20. It has a new cast iron crankshaft with a stroke of 72 mm (it was previously 66 mm), lightweight pistons, modified 145 mm forged connecting rods, and an old aluminum cylinder block […]

The M54B25, a highly popular 2.5-liter engine in the M54 series (which also includes the M54B22, M54B30, and S54B32), replaced the M52TUB25 on the BMW production line in 2000. The M54 and M52 differed in that the new engine’s cylinder block was still aluminum with cast-iron sleeves and a cast-iron crankshaft; connecting rods (145 mm) […]

Originally installed on the redesigned BMW E46 and E39, the BMW M54B30 engine was developed in 2000 based on the M52TUB28. The M54B22, M54B25, and S54B32 are among the new motors in addition to the M54B30. Cast iron liners are used in the aluminum alloy cylinder block, just like in the M52B28TU engine. BMW introduced […]