B37 vs B58
Side-by-side reliability comparison
Higher reliability score
B58
BEST
93/100
+18 points over B37
0
/ 100
ACCEPTABLE
B37
BMW
0
/ 100
BEST
B58
BMW
Specifications
B37
B58
Brand
BMW
BMW
Verdict
ACCEPTABLE
BEST
Reliability
75
93
Years
2015--2020
2015--present
Displacement
1496 cc
2998 cc
Layout
I3
I6
Type
Diesel
Petrol Turbo
Power
116 hp
326--387 hp
Known Issues
1
3
Total Risk Cost
€300--€1,000
€430--€1,000
Character
B37
"3-cylinder modular diesel. Shared architecture with B47/B57. Quiet for a 3-cyl. Limited production span. No major known issues — too few on road for long-term data. Timing chain is front-mounted (good)."
B58
"Possibly BMWs best engine ever. Forged internals, insane tuning (600hp+). 300k+ km."
Issues Comparison
B37 1
● MODERATE
DPF regeneration issues (city use)
B58 3
● MODERATE
Coolant expansion tank / line failure — early units
○ MINOR
Plastic charge pipe crack
○ MINOR
Valve cover gasket oil leak