2016 BMW 4 Series 435i N55B30 (F32 (Coupe), F33 (Convertible), F36 (Gran Coupe))

Engine identity

Oils and fluids

Service and parts data

Common and chronic problems

• High-pressure fuel pump failures (N55 engine)
• Turbocharger wastegate issues
• Water pump and thermostat failures

First checks

• Verify turbo operation and boost leaks
• Inspect oil consumption and valve cover gasket condition
• Check for any stored diagnostic trouble codes in DME

Antes de cambiar piezas

• Save fault codes and freeze-frame data before clearing anything.
• Check engine oil, coolant and transmission fluid using the correct temperature and service procedure.
• Verify power, ground, connectors, hoses, leaks and live data before replacing expensive parts.

Important notes

• Model sold globally but power ratings and emissions may vary by market.
• Coupe and Convertible share F32 and F33 chassis; Gran Coupe uses F36.
• 2016 435i replaced by 440i in some markets mid-cycle.