2023 BMW M850i S63B44T2 (G15)
G15 / Coupe / Convertible / Gran Coupe / Global (with variations by region)
S63B44T2Exact year/trim recordGold
Engine identity
Oils and fluids
Service and parts data
Common and chronic problems
- Potential high-pressure fuel pump failures
- Turbocharger charge pipe folding under boost
- Oil consumption in early production models
First checks
- Inspect turbocharger hoses for cracks
- Check oil level regularly due to V8 consumption
- Monitor engine fault codes for misfires
Before replacing parts
- 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 specs are consistent globally but minor tuning variations exist by market.
- Convertible and Gran Coupe variants share engine but vary in weight affecting performance.
- No official manual transmission offered for M850i in 2023 worldwide.