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E46 Sedan · Coupe · Touring · Cabrio
BMW 3 Series · Sedan · Coupe · Touring · Cabrio · 1998–2006
Peak analogue 3-series — the M54 six and S54 M3 define the generation.
Production run
1998–2006
Engines covered
7
Avg. part price
—
19902026
Interactive systems map
Inspect the E46
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
Engine8
Cooling1
Intake1
Fuel2
Exhaust1
Documented issues per engine
4M43
4M52
5M54
4N42
4N46
4S54
4M57
Known weak points
What breaks on the E46
Coil pack failureDiagnose →Crankcase breather icingDiagnose →Nikasil bore wear on early high-sulphur-fuel carsDiagnose →VANOS sealsDiagnose →DISA valve failureDiagnose →CCV / oil separatorDiagnose →Timing chain and guidesDiagnose →Valvetronic motorDiagnose →Timing chain stretch/rattleDiagnose →Valvetronic servo motorDiagnose →Rod bearing wear (service interval item)Diagnose →VANOS hub bolts and rebuildDiagnose →Swirl flap failure (early)Diagnose →EGR cooler leaksDiagnose →
Guides & playbooks
E46 playbooks
Maintenance scheduleGive me a mileage-based maintenance schedule for a BMW 3 Series E46, including the items the factory schedule skips.Buyer's inspectionI'm inspecting a used BMW 3 Series E46. What exactly should I check, test drive and look for underneath?Build planPlan a staged performance build for a BMW 3 Series E46 that stays reliable as a daily driver.Fault code lookupI have a fault code on my BMW 3 Series E46. Walk me through what it means and how to confirm the cause.
Fits your E46
Parts & tools
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