2026 BMW 330i B48B20M0/B48B20M1 (G20)

Engine identity

Oils and fluids

Service and parts data

Common and chronic problems

• Potential oil leaks from valve cover gasket
• High-pressure fuel pump wear noted in early G20 models (monitor service records)

First checks

• Inspect timing chain tensioner and guides especially in high mileage
• Check VANOS system for rattling noises

Avant de remplacer des pièces

• 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

• Market-dependent power outputs due to emissions requirements.
• Sedan and Touring body styles availability depends on region and production planning.