The BMW M40 is an SOHC straight-four petrol engine which was produced from 1987–1994. [1] [2] It served as BMW's base model four-cylinder engine and was produced alongside the higher performance BMW M42 DOHC four-cylinder engine from 1989 onwards. Compared with its M10 predecessor, the M40 uses a belt-driven camshaft, [3] and hydraulic ...

The M40-series started in 1987 with the production of 1.8-liter four-cylinder engine M40B18. M40 engines came to replace the old M10-series, which was very successful and common for BMW models in those days.

Apr 2, 2025 · The M40 engine is a notable inline-four powerplant developed by BMW, primarily designed to deliver a balance of performance and efficiency for the brand’s compact and mid-range models during the late 1980s and early 1990s.

Nov 6, 2022 · The BMW M40 engine replaced the M10 engine. The BMW M10 was produced for over 26 years, with 3.5 million units making their way onto several models — from the BMW 1500 of the New Class to the E30 3-Series.

Jul 6, 2023 · Dive into the Legacy of M40/42/43/44 Engines, from Revival to Racing. Discover their Evolution and Performance

Feb 3, 2025 · The BMW M40 engine, while celebrated for its performance and efficiency, has its share of problems that can affect its longevity and reliability. Understanding these issues is essential for owners and enthusiasts alike.

The M40 engine was released in 1987, and marked BMW's next generation of four-cylinder engines since the M10. It featured a belt-driven 8-valve OHC design, with an aluminium head on a cast iron block, and was produced in two capacities - …

The BMW M40B18 is a 1.8 liters (1,796 cc, 109.6 cu·in) straight-four, four-stroke cycle, natural aspirated gasoline engine from the BMW M40-family. The engine was manufactured from 1987 to 1994.

The BMW M40 is an inline-four SOHC piston engine which replaced the M10 and was produced from 1987–1995. Displacement ranges from 1.6 L to 1.8 L. It began to be replaced by the M43 SOHC engine in 1991, however from 1989 the M40 was produced alongside the higher performance M42 DOHC four-cylinder engine.

Apr 12, 2023 · The BMW M40 series of 1.6- and 1.8-liter gasoline engines was produced from 1987 to 1994 and was fitted to the most popular models of the concern at the time: the 5-Series E34, 3-Series E30 and E36. There was a 16-valve version of …