BMW · F30 · 2012–2019
3 Seriesbuyer's guide
10 known faults — inspection procedures and real repair costs.
The F30 is the cheap-to-buy, expensive-to-own 3 Series. Timing chain stretch on the N20, AdBlue and DPF faults on the diesels, and water-pump failure on every petrol — those three patterns are the difference between a bargain and a money pit. This guide walks you through the checks before you pay a deposit.
This guide covers ten documented issues: timing chain and wet-belt service risk (N20 / B47 / B48), automatic and clutch judder (ZF 8HP service intervals), AdBlue, DPF and EGR emissions faults, coolant leaks and electric water pump failure, iDrive infotainment and software electrical faults, suspension knocks and uneven tyre wear, brake corrosion and electronic parking brake faults, panoramic roof and boot water leaks, ADAS radar and camera calibration after windshield work, and the full recall and campaign checklist. Each fault has a field check and a real repair-cost range.
A documented, well-serviced F30 is a brilliant used car. An undocumented one is the most common "cheap BMW" trap on the market. This guide tells you which one is in front of you, in twenty minutes.
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