When BMW engines
start to fail
32 engines · 2,490 owner reports and records
14 of the 32 BMW engines we score have a serious problem that typically starts before 100,000 km. By 150,000 km it is 21.
A serious problem is one we rate critical or high in severity that owners report at least occasionally, so a rare catastrophe does not count. The mileage is where owner reports say it typically starts, not a guarantee either way.
| Car | Score | First serious problem | Typically from | Repair |
|---|---|---|---|---|
| BMW N20 in the 328i F30 | 52/100 | Vacuum pump failure | 60k km | up to €1,500 |
| BMW B47 in the 118d F20 LCI | 70/100 | EGR cooler leak (fire risk) | 60k km | up to €1,800 |
| BMW N20 in the 428i F32 | 45/100 | Oil pump drive chain failure | 79k km | €1,500–4,000 |
| BMW N20 in the 125i F20 | 49/100 | Oil pump wear / sludge buildup | 79k km | €1,500–4,000 |
| BMW M20B25 in the 325i E30 | 74/100 | Timing belt failure | 79k km | €400–1,200 |
| BMW B47 in the 120d F20 LCI | 72/100 | EGR cooler leak | 80k km | up to €1,600 |
| BMW B47 in the 320d F30 LCI | 73/100 | EGR cooler leak (fire risk) | 80k km | up to €1,800 |
| BMW B57 in the 330d G20 | 78/100 | EGR cooler leak | 80k km | up to €1,800 |
| BMW M47 in the 320d E46 | 80/100 | High-pressure fuel pump failure | 80k km | €800–2,000 |
| BMW N55 in the 335i F30 | 70/100 | Rod bearing failure | 84k km | €2,500–8,000 |
| BMW N55 in the M135i F20 LCI | 70/100 | Rod bearing failure | 84k km | €2,500–8,000 |
| BMW B58 in the M140i F20 LCI | 87/100 | Oil pump wear / sludge buildup | 85k km | €1,500–4,000 |
| BMW B58 in the M340i G20 | 91/100 | Oil pump failure | 85k km | €1,500–4,000 |
| BMW N55 in the 335i E90 LCI | 70/100 | Rod bearing failure | 97k km | €2,500–8,000 |
| BMW N52 in the 328i E90 | 74/100 | VANOS bolt failure | 110k km | up to €2,500 |
| BMW N47 in the 3 Series E90 LCI | 38/100 | High-pressure fuel pump failure | 115k km | €800–2,000 |
| BMW N47 in the 114d F20 | 38/100 | High-pressure fuel pump failure | 115k km | €800–2,000 |
| BMW N47 in the 3 Series F30 | 40/100 | High-pressure fuel pump failure | 115k km | €800–2,000 |
| BMW N47 in the 520d F10 | 40/100 | High-pressure fuel pump failure | 115k km | €800–2,000 |
| BMW N47 in the 120d F20 | 40/100 | High-pressure fuel pump failure | 115k km | €800–2,000 |
| BMW N54 in the 335i E90 LCI | 48/100 | High-pressure fuel pump failure | 129k km | €800–2,000 |
| BMW B58 in the 340i F30 | 87/100 | High-pressure fuel pump failure | 161k km | €800–2,000 |
| BMW M50B25 in the 325i E36 | 82/100 | Piston ringland failure | 173k km | €3,000–9,000 |
| BMW N46 in the 320i E90 | 46/100 | None that turns up regularly | — | — |
| BMW N13 in the 114i F20 | 50/100 | None that turns up regularly | — | — |
| BMW N13 in the 118i F20 | 54/100 | None that turns up regularly | — | — |
| BMW M62B44 in the 540i E39 | 59/100 | None that turns up regularly | — | — |
| BMW B38 in the 118i F20 LCI | 74/100 | None that turns up regularly | — | — |
| BMW B48 in the 320i F30 | 79/100 | None that turns up regularly | — | — |
| BMW B48 in the 120i F20 LCI | 82/100 | None that turns up regularly | — | — |
| BMW M54 in the 330i E46 | 84/100 | None that turns up regularly | — | — |
| BMW M57 in the 330d E90 | 92/100 | None that turns up regularly | — | — |