S85 vs B58

Side-by-side reliability comparison

Higher reliability score
B58 BEST 93/100
+53 points over S85
0 / 100
AVOID S85 BMW
0 / 100
BEST B58 BMW

Specifications

S85
B58
Brand
BMW
BMW
Verdict
AVOID
BEST
Reliability
40
93
Years
2005--2010
2015--present
Displacement
4999 cc
2998 cc
Layout
V10
I6
Type
Petrol Na
Petrol Turbo
Power
507 hp
326--387 hp
Known Issues
3
3
Total Risk Cost
€6,000--€18,000
€430--€1,000

Character

S85

"E60 M5 V10. Derived from F1 tech — 8,250rpm redline. Rod bearing failure endemic. Throttle actuator failure (10 of them). VANOS bolt recall. SMG gearbox issues. Incredible engine, terrible reliability."

B58

"Possibly BMWs best engine ever. Forged internals, insane tuning (600hp+). 300k+ km."

Issues Comparison

S85 3

◆ CRITICAL
VANOS bolt failure (recall) €1,000--€3,000 40,000 km--80,000 km
◆ CRITICAL
Rod bearing failure €3,000--€10,000 50,000 km--100,000 km
▲ HIGH
Throttle actuator failure (10 butterflies) €2,000--€5,000 50,000 km--100,000 km

B58 3

● MODERATE
Coolant expansion tank / line failure — early units €150--€350 60,000 km--120,000 km
○ MINOR
Plastic charge pipe crack €80--€200 60,000 km--150,000 km
○ MINOR
Valve cover gasket oil leak €200--€450 80,000 km--160,000 km

Models

S85 1

M5 E60 2005--2010

B58 26

6 Series F13 2015--2018 6 Series G32 2017--2023 1 Series F20 2015--2016 3 Series F30 2015--2019 1 Series F20 2016--2019 5 Series F10 2016--2017 4 Series F32 2016--2020 2 Series F22 2016--2021 7 Series G11 2016--2022 GR Supra A90 2019--present X5 G05 2020--present 3 Series G20 2019--present X4 G02 2018--present X5 G05 2018--present X6 G06 2019--present X7 G07 2019--present GR Supra A90 2022--present 5 Series G30 2017--2023 8 Series G15 2018--present 2 Series G42 2022--present 4 Series G22 2020--present X3 G01 2017--2024 Z4 G29 2019--present 7 Series G70 2023--present 5 Series G60 2024--present 340i F30 LCI 2015--2019 Sedan
Full S85 Report Full B58 Report