BMW M54

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BMW M54 engine

Manufacturer	BMW, Bayerische Motoren Werke AG
Production	2000–2006
Predecessor	BMW M52
Successor	BMW N52
Class	Straight-6
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 modern 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.

**Models**
Engine	Displacement	Power	Torque	Redline	Year
M54B22	2.2 L (2171 ccm/132 in³)	125 kW (170 hp) @ 6100rpm	210 N·m (155 ft·lbf) @ 3500	6500	2000
M54B25	2.5 L (2494 ccm/152 in³)	141 kW (191 hp) @ 6000rpm	245 N·m (181 ft·lbf) @ 3500	6500	2000
M54B30	3.0 L (2979 ccm/181 in³)	170 kW (231 hp) @ 5900rpm	300 N·m (221 ft·lbf) @ 3500	6500	2000
S54B32/US	3.2 L (3246 ccm/198 in³)	248 kW (333 hp) @ 7900rpm	355 N·m (262 ft·lbf) @ 4900	8000	2001
S54B32/EU	3.2 L (3246 ccm/198 in³)	252 kW (343 hp) @ 7900rpm	365 N·m (269 ft·lbf) @ 4900	8000	2001

[edit] M54B22

The 2.2 L (2171 ccm/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

[edit] M54B25

The M54B25 is a 2.5 L (2494 ccm) engine with an 84 mm bore and 75 mm stroke. It is all-aluminum with cast steel cylinder liners, fracture-split forged steel connecting rods, a one-piece cast camshaft, and a reinforced plastic intake manifold. Output is 190 hp (143 kW) at 6000 RPM with 175 ft.lbf (245 Nm) of torque at 3500 RPM. It is built in Steyr, Austria.

Applications:

2001-2005 E46 325i/325xi
2001-2006 E46 325Ci
2001-2004 E39 525i
2003-2004 E60/E61 525i/525xi
2004-2006 E83 X3 2.5i
2004-2006 E85 Z4 2.5i

[edit] M54B30

The M54B30 is a 3.0 L (2979 ccm) successor of the 2.8 L BMW M52. Bore remains the same at 84 mm, but stroke is increased 5.6 mm to 89.6 mm. Power is 231 hp (168 kW) while torque is 221 ft.lbf (290 Nm).

It is an all-aluminum engine (block and DOHC heads) with cast steel cylinder liners. It uses SFI fuel injection, has 4 valves per cylinder with VVT and features fracture-split forged steel connecting rods, a one-piece cast camshaft, 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:

2001-2005 E46 330i/330xi
2001-2006 E46 330Ci
2001-2003 E39 530i
2001-2002 E36 Z3 3.0i
2003-2006 E85 Z4 3.0i
2004-2006 E83 X3 3.0i
2001-2006 E53 X5 3.0i

[edit] S54B32

BMW S54 engine
Manufacturer	BMW M GmbH
Production	2001–
Predecessor	BMW S50
Class	Straight-6
Engine	3.2 L (3246 cm³/132 in³) 252 kW, 365 Nm

The S54B32 is a high-performance engine used in BMW M vehicles. It replaces the S50B32 engine of the E36 M3. Its block is made from cast steel rather than aluminum to achieve compactness. It is a 3.2 L (3246 ccm) engine; bore is 87 mm and stroke is 91 mm. Power output is 338 hp (252 kW) at 7900 rpm with 269 ft.lbf (365 Nm) market of torque at 4900 rpm with an 8000 rpm redline. This engine has the second-highest specific output of any production naturally aspirated piston engine. These performance numbers apply only to non-US versions of this engine, as the US version of this engine required some modifications (such as a close-coupled catalytic converter on the engine exhaust ports) and thus produced slightly less power at 333 hp (248 kW) and 262nbsp;ft.lbf (355 Nm).

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 - so far. 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 bearings, oil pumps, and whole engines under warranty.^{[citation needed]} This fault was not actually a BMW problem, but a problem with the connecting rod bottom-end bearing shells that were supplied to BMW by a third party. Some of the bearing shells provided did not meet BMW's specifications.^{[citation needed]}. This problem was fully corrected by BMW on engines produced after 06/2003. A recall was done to retrofit all previously produced engines with the proper bearing shells.

As of 2006 the S54 continues to be used in the M Coupe and M Roadster

Applications: