BMW 8 Series (E31)
BMW · 8-SERIES · E31
Verified1 source
1 source
- Editorial sourceeditorial
Reliability snapshot
The E31 8 Series is a rare, complex 1990s grand tourer, powered by V8 (M60/M62) and V12 (M70/M73) engines. As a low-volume, technology-rich classic, its main ownership themes are electronic complexity, cooling-system upkeep, and the cost and specialist knowledge required for the V12 cars in particular. A well-sorted E31 is a special car, but buyers should expect classic-GT maintenance costs and buy strictly on condition and history.
Top problems on the E31
Most expensive and most frequently reported issues — ordered by repair cost
- Caution — monitor closelyAgeing plastic cooling components
- Avoid long tripsV12 complexity and electronics
Engines and trims
E31 production variants
3.5–4.4L V8 (M62)
5.4L V12 (M73)
M62 3.5–4.4 V8
3.5–4.4L V8
NA V8; timing-chain guides and cooling are age items.
5.0L V12 (M70)
M70 5.0 V12
5.0L V12
NA V12; complex twin-ECU setup, specialist maintenance.
3.0–4.0L V8 (M60)
Maintenance overview
Key service intervals (varies by engine and driving conditions)
| Service item | Interval | Typical cost |
|---|---|---|
| Engine oil and filter Per BMW's Condition Based Service schedule | 12,000–15,000 km | |
| Cooling-system refresh Preventive — or sooner by vehicle age | 120,000–150,000 km |