EngineCreep
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BMW N47
vs B47

N47 38–40/100 · B47 70–73/100

On our scores the BMW B47 is the safer buy: 70–73/100 against 38–40/100 for the BMW N47.

Same car, either engine

The F30 was sold with both.

  1. BMW N47 in the 3 Series F302012–2015

    40/100Risky

    19 confirmed issues

    Best-known problemHigh-pressure fuel pump failure · from 115k km · €800–2,000

  2. BMW B47 in the 320d F30 LCI2015–2018

    73/100Good

    8 confirmed issues

    Best-known problemEGR cooler leak (fire risk) · from 80k km · up to €1,800

The F20 was sold with both.

  1. BMW N47 in the 120d F202011–2014

    40/100Risky

    15 confirmed issues

    Best-known problemHigh-pressure fuel pump failure · from 115k km · €800–2,000

  2. BMW N47 in the 114d F202012–2015

    38/100Avoid

    15 confirmed issues

    Best-known problemHigh-pressure fuel pump failure · from 115k km · €800–2,000

  3. BMW B47 in the 120d F20 LCI2015–2019

    72/100Good

    8 confirmed issues

    Best-known problemEGR cooler leak · from 80k km · up to €1,600

  4. BMW B47 in the 118d F20 LCI2015–2019

    70/100Good

    8 confirmed issues

    Best-known problemEGR cooler leak (fire risk) · from 60k km · up to €1,800

Version by version

BMW N47

  1. BMW N47 in the 3 Series F302012–2015

    40/100Risky

    19 confirmed issues

    Best-known problemHigh-pressure fuel pump failure · from 115k km · €800–2,000

  2. BMW N47 in the 520d F102010–2013

    40/100Risky

    15 confirmed issues

    Best-known problemHigh-pressure fuel pump failure · from 115k km · €800–2,000

  3. BMW N47 in the 120d F202011–2014

    40/100Risky

    15 confirmed issues

    Best-known problemHigh-pressure fuel pump failure · from 115k km · €800–2,000

  4. BMW N47 in the 3 Series E90 LCI2009–2012

    38/100Avoid

    16 confirmed issues

    Best-known problemHigh-pressure fuel pump failure · from 115k km · €800–2,000

  5. BMW N47 in the 114d F202012–2015

    38/100Avoid

    15 confirmed issues

    Best-known problemHigh-pressure fuel pump failure · from 115k km · €800–2,000

BMW B47

  1. BMW B47 in the 320d F30 LCI2015–2018

    73/100Good

    8 confirmed issues

    Best-known problemEGR cooler leak (fire risk) · from 80k km · up to €1,800

  2. BMW B47 in the 120d F20 LCI2015–2019

    72/100Good

    8 confirmed issues

    Best-known problemEGR cooler leak · from 80k km · up to €1,600

  3. BMW B47 in the 118d F20 LCI2015–2019

    70/100Good

    8 confirmed issues

    Best-known problemEGR cooler leak (fire risk) · from 60k km · up to €1,800

The problems they share

Reported on both

  • Timing chain stretch / guide wear
  • DPF clogging / regeneration failure
  • Piston ringland failure
  • Excessive oil consumption
  • Dual-mass flywheel / clutch wear
  • Intercooler failure or leak
  • EGR valve / swirl flap clogging
  • Thermostat / temperature sensor failure
  • Engine sensor failure

Only on the BMW N47

  • High-pressure fuel pump failure
  • Oil pump wear / sludge buildup
  • Dual-clutch / automatic transmission failure
  • Head gasket failure
  • Water pump failure
  • Rod bearing failure
  • Oil leak from seals or gaskets
  • Fuel injector failure
  • Glow plug failure
  • Wastegate / boost actuator failure
  • Variable valve timing solenoid/actuator failure

Only on the BMW B47

  • EGR cooler leak (fire risk)
  • Turbocharger failure
  • EGR cooler leak
  • ECU fault or wiring issue

A problem missing from a version may be rarer there, or have fewer owner reports behind it so far.

Head to head