M52TU

The M52TU is an inline-six cylinder gasoline engine produced by BMW. It is an evolution of the earlier M52 engine, with the "TU" designation standing for "Technical Update." Introduced in the late 1990s, the M52TU brought several improvements over its predecessor.

Key updates to the M52TU included the introduction of VANOS (Variable Valve Timing) on both the intake and exhaust camshafts, a significant enhancement for improving both performance and fuel efficiency. The engine also featured a redesigned intake manifold, a dual-mass flywheel for smoother operation, and an updated engine management system. Different displacement variants were available, with common examples being 2.5-liter and 2.8-liter versions.

The M52TU was widely used across various BMW models during its production run, including the E36 3 Series, E46 3 Series, E39 5 Series, and Z3 roadster. It was known for its smooth power delivery, reliability, and sporty character, characteristic of BMW's inline-six engines. The engine's robust construction and relatively straightforward design made it a popular choice for enthusiasts. Production of the M52TU eventually transitioned to the N-series engines, such as the N52.