S65 vs B58
Side-by-side reliability comparison
Higher reliability score
B58
BEST
93/100
+41 points over S65
0
/ 100
CAUTION
S65
BMW
0
/ 100
BEST
B58
BMW
Specifications
S65
B58
Brand
BMW
BMW
Verdict
CAUTION
BEST
Reliability
52
93
Years
2007--2013
2015--present
Displacement
3999 cc
2998 cc
Layout
V8
I6
Type
Petrol Na
Petrol Turbo
Power
420 hp
326--387 hp
Known Issues
2
3
Total Risk Cost
€4,000--€11,000
€430--€1,000
Character
S65
"E90/E92 M3. High-revving 8,300rpm V8. Rod bearing failure is THE concern — can destroy engine without warning. Throttle actuators fail. Amazing driving experience but preventive rod bearings are mandatory."
B58
"Possibly BMWs best engine ever. Forged internals, insane tuning (600hp+). 300k+ km."
Issues Comparison
S65 2
◆ CRITICAL
Rod bearing failure
▲ HIGH
Throttle actuator failure (8 butterflies)
B58 3
● MODERATE
Coolant expansion tank / line failure — early units
○ MINOR
Plastic charge pipe crack
○ MINOR
Valve cover gasket oil leak