S63 vs B58
Side-by-side reliability comparison
Higher reliability score
B58
BEST
93/100
+28 points over S63
0
/ 100
CAUTION
S63
BMW
0
/ 100
BEST
B58
BMW
Specifications
S63
B58
Brand
BMW
BMW
Verdict
CAUTION
BEST
Reliability
65
93
Years
2011--present
2015--present
Displacement
4395 cc
2998 cc
Layout
V8
I6
Type
Petrol Turbo
Petrol Turbo
Power
560--625 hp
326--387 hp
Known Issues
2
3
Total Risk Cost
€2,000--€6,500
€430--€1,000
Character
S63
"F10/F90 M5 engine. Hot-V turbo layout. More reliable than N63 base engine due to stronger internals. Rod bearing concern on early units. Oil consumption. Expensive maintenance but less catastrophic than N63."
B58
"Possibly BMWs best engine ever. Forged internals, insane tuning (600hp+). 300k+ km."
Issues Comparison
S63 2
▲ HIGH
Rod bearing concern (early units)
● MODERATE
Oil consumption
B58 3
● MODERATE
Coolant expansion tank / line failure — early units
○ MINOR
Plastic charge pipe crack
○ MINOR
Valve cover gasket oil leak