Common Problems with the
2018–2019 BMW 3 Series (F30/F31/F34)

We've identified 2 known issues that can affect the 2018–2019 BMW 3 Series (F30/F31/F34). 1 of these are serious faults that could be expensive to repair.

Known Issues

Serious

Moderate

Minor

The 2018–2019 period has 1 more issue than the BMW 3 Series (F30/F31/F34) average across all year periods.

All Known Issues

EGR Cooler Leak (Diesel)

SeriousExhaust & Emissions

Leaking coolant in the diesel EGR system can mix with soot and create a fire risk (Recall 18V755). UK recall completion matters more than a seller saying it has been checked.

Most affected: 316d, 318d, 320d, 320ed, 325d, 330d, 335d

Estimated cost: £0 (Recall)Affects: 2012–2019Often appears around: Usually 40,000 miles plus, but recall status is the main issue

Typical symptoms

•Coolant loss with no obvious leak
•Sweet smell after shutdown
•Engine-management light or drivetrain warnings

What to inspect before you buy

✓Verify recall completion (Recall 18V755) against the VIN
✓Inspect around the EGR cooler for staining or white residue
✓Be careful with cars that have had repeated coolant top-ups

Door Mirror Motor Failure

MinorBodywork & Rust

The power-fold mirror motors seize or lose calibration, leaving mirrors stuck open or folded and making the car feel more tired than its mileage suggests.

Most affected: SE, Sport, Luxury, M Sport, Touring

Estimated cost: £150–£300Affects: 2012–2019Often appears around: Age-related, especially 6+ years old

Typical symptoms

•One mirror folds slower than the other
•Buzzing from the housing
•Mirror stops half-way

What to inspect before you buy

✓Cycle both mirrors several times
✓Inspect for cracked housings after car-park knocks
✓Check memory-seat cars still return to the same positions

Buying Tips for the 2018 BMW 3 Series (F30/F31/F34)

✓Pre-2015 320i/328i cars need careful listening for N20 timing-chain whine and proof of guide work
✓Check the steering, front wishbones, and tyres on rough roads - these cars hide wear badly until they are on UK B-roads
✓Insist on completed diesel EGR recall evidence, especially on 318d, 320d, and 330d variants
✓Touring models should have a dry boot and a smooth electric tailgate with no latch hesitation

2016–2017 BMW 3 Series (F30/F31/F34)