Best BMW Engines

2.0-2.8L NA I6

3 Series, 5 Series, Z3

Smooth, linear, bulletproof. Classic BMW feel. Simple maintenance. Cheap parts.

3.0L Turbo I6

1 Series, 3 Series, 5 Series, 4 Series, 2 Series, 7 Series, GR Supra, X5, X4, X6, X7, 8 Series, X3, Z4, 340i

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

2.2-3.0L NA I6

5 Series, 3 Series, Z4, X5, Z3

Peak old-school BMW. Raspy, high-revving, raw. The benchmark. 300k+ km routine.

2.5-3.0L NA I6

5 Series, 3 Series, Z4, X5, 1 Series

Last great NA six. Lighter (magnesium block), smoother, higher-revving than M54. 250k+ km.

M50 2.0/2.5 NA I6

Cast iron block legend. One of BMW's most reliable ever. M50TU added single VANOS. Strong internals ...

3.0L Turbo Diesel I6

5 Series, X5, 3 Series, 7 Series

Legendary diesel six. Powered E46 330d to E90 335d. Smooth, torquey, reliable. Swirl flaps and turbo...

2.0L Turbo I4

X3, 4 Series, Z4, 2 Series Active Tourer, 3 Series, GR Supra, 1 Series, 5 Series, X2, X1, 2 Series, X4, 320i, 320i GT, 320i Touring, 330i GT, 330i Touring, 420i Gran Coupe

B58s little brother. Efficient, smooth. Remap to 260hp safe. Best modern 4-cyl BMW.

M43 1.6/1.8/1.9 NA I4

3 Series

Cast iron block workhorse. Timing chain not belt (unlike M40). Simple, cheap to maintain. 300k+ km c...

2.0L Turbo Diesel I4

1 Series, X1, 3 Series, 2 Series, X3, X4, 5 Series, 4 Series, 2 Series Active Tourer, X5, X2, X6, 7 Series, X7, 8 Series, 320d, 320d GT, 320d Touring, 420d Gran Coupe

Torque monster, sips fuel. Fixed N47 flaws. Chain front-mounted. Avoid city-only.

3.0L Quad-Turbo Diesel I6

530d, X5 30d

B47 big brother. Inline-6 diesel smoothness. Single to quad-turbo variants. Excellent highway torque...

S50/S54 M3 Engines

M3

E36 M3 (S50) and E46 M3 (S54). High-revving NA legends. S50B32 is bulletproof. S54 has rod bearing a...

M44 1.9 DOHC I4

Z3, 3 Series

DOHC successor to M42. E36 318is and Z3 1.9. Smooth rev-happy nature. Roller rockers. Reliable daily...

3.0L Turbo Diesel I6

4 Series, 5 Series, X3, 3 Series, X5, 7 Series

M57 successor. Single to tri-turbo variants. N57S/N57D30T1 = 381hp. Excellent cruiser. Turbo and EGR...

3.0L Turbo I6

3 Series, 5 Series, 1 Series, X5, X3, 2 Series, 7 Series, M2, 335i GT, 435i

Fixed N54. Known issues cheap + documented. 200k+ km proven. Good tuning base.

S68 4.4 V8 Twin-Turbo

7 Series, X5, M5

Latest M V8. XM/M5 G70. Cross-plane crank, 48V mild hybrid on some variants. Too new for long-term d...

B37 1.5 Diesel I3

3-cylinder modular diesel. Shared architecture with B47/B57. Quiet for a 3-cyl. Limited production s...

1.5L Turbo I3

2 Series Active Tourer, 1 Series, 3 Series, X1, i8, 116i, 118i, 318i

Budget modern BMW. Reliable but not exciting. 136hp adequate for city. Limited tuning.

S62 5.0 V8

M5

E39 M5 V8. High-revving naturally aspirated masterpiece. Rod bearing concerns at high mileage. VANOS...

M41D17 1.7 Diesel

3 Series

E36 318tds. Pre-common-rail indirect injection. Simple, economical. No swirl flaps, no DPF. Timing b...

M51 2.5 Diesel I6

3 Series, 5 Series

Pre-common-rail indirect injection diesel. Cast iron tractor engine. Injection pump main failure at ...

3.0L Twin-Turbo M I6

M3, M2, M4, XM

Brute force 500+ hp. M-car care mandatory. Youngest M engine — early data.

3.0L Twin-Turbo M I6

M4, M2, M3

Track weapon. M-car level care mandatory. Fragile if abused.

S63 4.4 V8 Twin-Turbo

M5

F10/F90 M5 engine. Hot-V turbo layout. More reliable than N63 base engine due to stronger internals....

M47 2.0 Diesel I4

Pre-N47 diesel. Early M47D20 (non-common-rail) is simple. M47TU (2001+) has swirl flaps that can des...

M62 4.4 V8

X5, 5 Series

E39 540i/E38 740i V8. Alusil block, Nikasil issues on early units. VANOS failure, timing chain guide...

2.0L Turbo I4

X1, X3, 5 Series, Z4, 3 Series, 4 Series, 1 Series, 2 Series, X5, 320i Touring, 420i Gran Coupe

Punchy turbo four. One known flaw (timing chain class-action 2012-15). After fix: 200k+ km.

1.6L Turbo I4

1 Series, 3 Series

Prince engine (BMW/PSA). Timing chain issues. Adequate power but questionable long-term.

S65 4.0 V8

M3

E90/E92 M3. High-revving 8,300rpm V8. Rod bearing failure is THE concern — can destroy engine withou...

N43 1.6/2.0 DI NA I4

1 Series, 5 Series, 3 Series

Direct injection 4-cyl. Injector failure, high-pressure fuel pump issues, lean-burn NOx sensor probl...

N63 4.4 V8 Twin-Turbo

X5, 8 Series, 5 Series, 7 Series

Hot-V design cooks turbos and injectors between cylinder banks. Oil consumption, coolant leaks, inje...

S85 5.0 V10

M5

E60 M5 V10. Derived from F1 tech — 8,250rpm redline. Rod bearing failure endemic. Throttle actuator ...

N62 4.4/4.8 V8

5 Series, 7 Series, X5

Valve stem seal failure (30%+ by 160k km). Coolant transfer pipe leak = 40+ hours labour. Timing cha...

2.0L Turbo Diesel I4

3 Series, 5 Series, 1 Series, Clubman, Countryman, Cooper, Mini, Paceman, X3, X1, 4 Series, 220d, 320d Touring, 420d Gran Coupe

Rear-mounted timing chain = catastrophic failure risk. Notorious. Replaced by B47.

3.0L Twin-Turbo I6

1 Series, Z4, 3 Series, 5 Series

Huge tuning potential ("European 2JZ"). Constant problems. Project car, not daily.

1.6-2.0L NA I4

3 Series, 1 Series, X1

Slow, poor economy, unreliable. No reason to buy when 6-cyl options exist at same price.

3.0L DI I6

5 Series, 3 Series

N54 reliability without turbo power. Worst of both worlds. EU only.