2023 BMW M340i B58B30M0/B58B30M1 (G20)
G20 / Sedan / Touring / Global (Europe, North America, Asia; minor variations in emissions and equipment)
B58B30M0B58B30M1Fiche exacte année/versionGold
Engine identity
Oils and fluids
Service and parts data
Common and chronic problems
- Oil leaks from valve cover gasket (B58 common)
- High-pressure fuel pump wear
- Turbocharger wastegate rattle (rare)
First checks
- Inspect oil and coolant levels regularly
- Check for software updates impacting engine management
- Monitor for unusual noises from turbocharger area
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
- Engine and specifications may vary slightly by market due to emissions regulations
- No manual transmission available for 2023 M340i; automatic only
- Technical details consistent with global markets including USA, Europe, and Asia