M43 vs B58

Side-by-side reliability comparison

Higher reliability score
B58 BEST 93/100
+11 points over M43
0 / 100
BUY M43 BMW
0 / 100
BEST B58 BMW

Specifications

M43
B58
Brand
BMW
BMW
Verdict
BUY
BEST
Reliability
82
93
Years
1991--2002
2015--present
Displacement
1895 cc
2998 cc
Layout
I4
I6
Type
Petrol Na
Petrol Turbo
Power
75--118 hp
326--387 hp
Known Issues
2
3
Total Risk Cost
€180--€550
€430--€1,000

Character

M43

"Cast iron block workhorse. Timing chain not belt (unlike M40). Simple, cheap to maintain. 300k+ km common. Low power is the only complaint."

B58

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

Issues Comparison

M43 2

● MODERATE
Cooling system plastic failures €100--€350 80,000 km--150,000 km
○ MINOR
Valve cover gasket oil leak €80--€200 60,000 km--120,000 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

M43 3

3 Series E36 1992--1996 3 Series E36 1993--1999 3 Series E36 1993--1999

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 M43 Report Full B58 Report