1991 BMW M5 E34 MANUAL

High-performance M model with 3.6-liter S38 engine (later 3.8-liter with 340 hp).

Timing chain tensioner failures; Cooling system failures; Throttle body synchronization issues; Valve adjustment requirements; Expensive parts and maintenance; Power steering leaks; Front control arm bushings wear; Differential mount failures; Brittle interior plastics; Instrument cluster pixel failures; Difficult parts availability; High oil consumption