← All platforms

E46 M52

BMW 3 Series · Sedan · Coupe · Touring · Cabrio · 1998–2006

2.0–2.8L inline six; early blocks are Nikasil, later Alusil.

Production run

1998–2006

Engines covered

7

Avg. part price

—

19902026

Interactive systems map

Inspect the E46 M52

Tap a hotspot to inspect that system

Systems map

Where it goes wrong

Each numbered hotspot counts the documented failure points in that area. Select one to see the specifics for this chassis and engine.

Failure points by system

Engine1

Cooling1

Fuel1

Documented issues per engine

4

M43

4

M52

5

M54

4

N42

4

N46

4

S54

4

M57

Known weak points

What breaks on the E46 M52

Nikasil bore wear on early high-sulphur-fuel carsDiagnose →VANOS sealsDiagnose →CCV freezingDiagnose →Expansion tank and radiator neck cracksDiagnose →

Guides & playbooks

E46 M52 playbooks

Maintenance scheduleGive me a mileage-based maintenance schedule for a BMW 3 Series E46 M52, including the items the factory schedule skips.Buyer's inspectionI'm inspecting a used BMW 3 Series E46 M52. What exactly should I check, test drive and look for underneath?Build planPlan a staged performance build for a BMW 3 Series E46 M52 that stays reliable as a daily driver.Fault code lookupI have a fault code on my BMW 3 Series E46 M52. Walk me through what it means and how to confirm the cause.

Fits your E46 M52

Parts & tools

Full catalog & export

Loading catalog…