M52

1994–2001•6 cyl•Inline•Al / Al

← Predecessor: M50

Successor: M54 →

Aluminium block (except US models)
Single VANOS (Double VANOS on TU)
Improved fuel economy

The BMW M52 (1994–2001) was a further evolution of the inline-6 family. It introduced an aluminium block (except US models) saving 20 kg over the M50. Single VANOS on intake, later Double VANOS (M52TU). Displacements: 2.0, 2.5, 2.8 L, up to 193 hp. Used in E36, E39, E38.

Known for head gasket issues and Nikasil cylinder lining problems on early versions, but overall very reliable. Lifespan can exceed 350,000 km.

TU

In 1998, the M52 received a technical update (M52TU).

Key changes:

Added Double VANOS, continuously adjusting both intake and exhaust camshafts.
Electronic throttle (drive-by-wire) replaced mechanical linkage.
Siemens MS42 engine management.
Improved cooling system.

These updates improved low-end torque and reduced emissions.