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BMW M54 engine
JK M54B30 2.jpg
Automotive industryBMW, Bayerische Motoren Werke AG
PredecessorBMW M52
SuccessorBMW N52/N54/S65
Car classificationStraight-6
Internal combustion engine2.2 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.

M54B222.2 L (2171 cc/132 in³) 125 kW (168 hp) @ 6100 rpm Convert/Nm @ 350065002000
M54B252.5 L (2494 cc/152 in³) 143 kW (192 hp) @ 6000 rpm Convert/Nm @ 35006500200075.0mm (2.95 in 84mm (3.31 in)10.5:1
M54B303.0 L (2979 cc/181 in³) 170 kW (228 hp) @ 5900 rpm Convert/Nm @ 35006500200089.6mm (3.53 in)84mm (3.31 in)10.2:1
S54B32/US3.2 L (3246 cc/198 in³) 248 kW (333 hp) @ 7900 rpm Convert/Nm @ 49008000200191.0mm (3.58 in)87.0mm (3.43 in)11.5:1
S54B32/EU3.2 L (3246 cc/198 in³) 252 kW (338 hp) @ 7900 rpm Convert/Nm @ 490080002001


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.



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.



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.



BMW S54 engine
BMW S54B32 Engine.JPG
Automotive industryBMW M GmbH
PredecessorBMW S52
Car classificationStraight-6
Internal combustion engine3.2 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.


See also


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