BMW M54
From BMW Tech
 | |
| Automotive industry | BMW, Bayerische Motoren Werke AG |
|---|---|
| Production | 2000–2006 |
| Predecessor | BMW M52 |
| Successor | BMW N52/N54/S65 |
| Car classification | Straight-6 |
| Internal combustion engine | 2.2 L (2171 cc/132 in³) 2.5 L (2494 cc/152 in³) 3.0 L (2979 cc/181 in³) |
The BMW M54 is a Straight-6 engine, debuting in the year 2000. It is an evolution of the BMW M52. The engine has Double VANOS Variable valve timing to adjust timing of both intake and exhaust valves.
| Engine | Displacement | Power | Torque | Redline | Year | Stroke | Bore | Compression |
|---|---|---|---|---|---|---|---|---|
| M54B22 | 2.2 L (2171 cc/132 in³) | 125 kW (168 hp) @ 6100 rpm | Convert/Nm @ 3500 | 6500 | 2000 | |||
| M54B25 | 2.5 L (2494 cc/152 in³) | 143 kW (192 hp) @ 6000 rpm | Convert/Nm @ 3500 | 6500 | 2000 | 75.0mm (2.95 in | 84mm (3.31 in) | 10.5:1 |
| M54B30 | 3.0 L (2979 cc/181 in³) | 170 kW (228 hp) @ 5900 rpm | Convert/Nm @ 3500 | 6500 | 2000 | 89.6mm (3.53 in) | 84mm (3.31 in) | 10.2:1 |
| S54B32/US | 3.2 L (3246 cc/198 in³) | 248 kW (333 hp) @ 7900 rpm | Convert/Nm @ 4900 | 8000 | 2001 | 91.0mm (3.58 in) | 87.0mm (3.43 in) | 11.5:1 |
| S54B32/EU | 3.2 L (3246 cc/198 in³) | 252 kW (338 hp) @ 7900 rpm | Convert/Nm @ 4900 | 8000 | 2001 |
M54B22
The 2.2 L (2171 cc/132 in³) M54B22 produced 125 kW (170 hp) at 6100 rpm and 210 N·m (155 ft·lbf) at 3500 rpm.
Applications:
- 2001-2003 E46 320i/320Ci
- 2001-2003 E39 520i
- 2001-2002 E36 Z3 2.2i
- 2003-2005 E85 Z4 2.2i
- 2003-2005 E60/E61 520i
M54B25
The M54B25 is a 2.5 L (2494 cc) engine with an 84 mm (3.3 in) bore and 75 mm (3.0 in) stroke. It is all-alloy with Al-Sil block, fracture-split forged steel connecting rods, a one-piece cast crankshaft, and a reinforced plastic intake manifold. Output is 192 hp (143 kW) at 6000 rpm with 175 ft·lbf (245 Nm) of torque at 3500 rpm. It is built in Steyr, Austria.
Applications:
- 2001-2002 E36/7 Z3 2.5i
- 2001-2005 E46 325i/325xi
- 2001-2006 E46 325Ci
- 2001-2004 E46 325ti
- 2001-2004 E39 525i
- 2003-2004 E60/E61 525i/525xi
- 2004-2006 E83 X3 2.5i
- 2004-2006 E85 Z4 2.5i
M54B30
The M54B30 is a 3.0 L (2979 cc) successor of the 2.8 L BMW M52. Bore remains the same at 84 mm (3.3 in), but stroke is increased 5.6 mm (0.2 in) to 89.6 mm (3.5 in). Power is 225 hp (168 kW) at 5,900 rpm while torque is 200 ft·lbf (300 Nm) at 3,500 rpm.
It is an all-alloy engine with Al-Sil block. It uses SFI Fuel injection, has Multivalve with Double VANOS (variable valve timing) and features fracture-split forged steel connecting rods, a one-piece cast crankshaft, and reinforced plastic intake manifold. It is produced in Steyr, Austria.
The M54B30 was on the Ward's 10 Best Engines list through 2001-2003.
Applications:
- 2000-2005 E46 330i/330xi
- 2000-2006 E46 330Ci
- 2000-2003 E39 530i
- 2000-2002 E36 Z3 3.0i
- 2003-2005 BMW E60 530i
- 2003-2006 E85 Z4 3.0i
- 2004-2006 E83 X3 3.0i
- 2001-2006 E53 X5 3.0i
S54B32
 | |
| Automotive industry | BMW M GmbH |
|---|---|
| Production | 2001– |
| Predecessor | BMW S52 |
| Car classification | Straight-6 |
| Internal combustion engine | 3.2 L (3246 cc/132 in³) 252 kW, 365 N·m (269 lb·ft) |
The S54B32 is a high-performance engine used in BMW M vehicles. It replaces the U.S. S52B32 and the European S50B32 engines of the E36 M3. Its block is made from grey cast iron rather than aluminum to achieve greater rigidity from the same dimensions. It is a 3.2 L (3246 cc) engine; bore is 87 mm (3.4 in) and stroke is 91 mm (3.6 in). Power output is 343 hp (252 kW) at 7900 rpm with 269 ft·lb (365 Nm) of torque at 4900 rpm with an 8000 rpm redline. These performance numbers apply only to non-US versions of this engine in the M3, as the US version of this engine required some modifications (such as close-coupled Catalytic converter closer to the engine exhaust ports) and thus produced slightly less power at 333 hp (248 kW) and 262 ft·lb (355 Nm). The Z4 using this engine was rated at 330 HP, while the Z3 that used this engine was rated at 315 HP.
The S54 won the International Engine of the Year award overall for 2001, and also claimed the "Best New Engine" that year as well as won the 3-4 L category for six straight years in a row from 2001 through 2006. The S54 was also on the Ward's 10 Best Engines list for 2002 through 2004.
The S54 used to be known as the Engine of Damocles because of the tendency of early production M3s to explode spectacularly at elevated engine speeds. BMW attempted to blame vehicle owners for the failures early on but eventually started replacing rod Bearing, oil pumps, and whole engines under Warranty.[1] This fault was attributed to a problem with the connecting rod bottom-end bearing shells that were supplied to BMW by a third party that did not meet BMW's specifications.[2] This problem was fully corrected by BMW on engines produced after 06/2003. A recall was issued to retrofit all M3 cars with affected engines to swap to the proper bearing shells. The recall did not include M Roadster or M Coupe cars with affected S54 engines.
BMW has since retired the S54 engine.
Applications:
- 2001-2006 E46 M3
- 2001-2002 E36 BMW Z3 Roadster/Z3 M Roadster/Z3 M Coupé
- 2006-2008 E85 Z4 M Roadster E86 Z4 M Coupé
- 2002-2005 Wiesmann Roadster MF3
