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F30 Sedan
BMW 3 Series · Sedan · 2012–2018
First turbo-four 3-series generation, with the N55 six at the top of the range.
Production run
2012–2018
Engines covered
8
Avg. part price
—
19902026
Interactive systems map
Inspect the F30
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
Engine5
Cooling4
Intake1
Fuel3
Exhaust4
Documented issues per engine
4N20
4N26
4N55
4B48
4B58
4N47
4B47
4N57
Known weak points
What breaks on the F30
Timing chain and guide failure (pre-2015)Diagnose →Oil filter housing gasket leakDiagnose →Timing chain wearDiagnose →Emissions hardwareDiagnose →Plastic charge pipe crackingDiagnose →Coolant leaks at the pumpDiagnose →Vacuum pump seepageDiagnose →Coolant pump / thermostatDiagnose →Valve cover gasket seepageDiagnose →Timing chain at the rear of the block (major job)Diagnose →EGR coolerDiagnose →DPF and AdBlue faultsDiagnose →Timing chain (early)Diagnose →EGR cooler leaks and recallDiagnose →
Guides & playbooks
F30 playbooks
Maintenance scheduleGive me a mileage-based maintenance schedule for a BMW 3 Series F30, including the items the factory schedule skips.Buyer's inspectionI'm inspecting a used BMW 3 Series F30. What exactly should I check, test drive and look for underneath?Build planPlan a staged performance build for a BMW 3 Series F30 that stays reliable as a daily driver.Fault code lookupI have a fault code on my BMW 3 Series F30. Walk me through what it means and how to confirm the cause.
Fits your F30
Parts & tools
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