Overview
Community orientation
The G14/G15/G16 8-Series — Coupé, Convertible and Gran Coupé — with the B58 six (840i), the N63 V8 (M850i xDrive) and the B57 diesel (840d), ZF 8-speed automatic. Editorial summary, not a reliability rating; per-configuration facts are below.
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Filtered: N63 · 4.4L V8 (N63).
Known issues
Sorted by severity. Tap an issue to reveal its symptom, repair and what to check.
Engines & reliability
Tap a row to filter the issues to that engine.
Pre-purchase checklist
Test drive
- ☐Assess shift quality and D/R engagement when warm
Maintenance
Key service intervals — vary by engine and driving conditions.
ItemIntervalCost
Brake fluid~2 years
Engine oil and filter12,000–15,000 km