N20 vs B58
Side-by-side reliability comparison
Higher reliability score
B58
BEST
93/100
+35 points over N20
0
/ 100
CAUTION
N20
BMW
0
/ 100
BEST
B58
BMW
Specifications
N20
B58
Brand
BMW
BMW
Verdict
CAUTION
BEST
Reliability
58
93
Years
2011--2015
2015--present
Displacement
1997 cc
2998 cc
Layout
I4
I6
Type
Petrol Turbo
Petrol Turbo
Power
184--245 hp
326--387 hp
Known Issues
3
3
Total Risk Cost
€1,850--€4,100
€430--€1,000
Character
N20
"Punchy turbo four. One known flaw (timing chain class-action 2012-15). After fix: 200k+ km."
B58
"Possibly BMWs best engine ever. Forged internals, insane tuning (600hp+). 300k+ km."
Issues Comparison
N20 3
◆ CRITICAL
Timing chain + guide + tensioner — class-action
▲ HIGH
Electric water pump failure
● MODERATE
Oil filter housing gasket leak
B58 3
● MODERATE
Coolant expansion tank / line failure — early units
○ MINOR
Plastic charge pipe crack
○ MINOR
Valve cover gasket oil leak