The BMW M54 is a naturally aspirated straight-6 petrol engine which was produced from 2000 to 2006. It was released in the E53 X5 and is the replacement for the M52.
It began to be phased out following the introduction of the N52 in 2004.
The M54 topped the Ward's 10 Best Engines list in 2002 and 2003.
The BMW S54 is the equivalent high performance engine, which was used in the E46 M3, the Z3 M Coupe/Roadster and the Z4 M.
The BMW M56 SULEV engine is based on the M54.
Video BMW M54
Design
Compared with the final versions of its M52 predecessor (called M52TU), the M54 has a non-return fuel system, a fully electronic throttle (without mechanical backup), an electronically controlled thermostat, Siemens MS 43 engine management, a revised intake manifold and the North American engines no longer use an iron block. The displacement of the largest variant increased from 2.8 litres to 3.0 L (183 cu in), due to an increase in stroke to 89.6 mm (3.5 in).
As per the M52TU, the M54 uses an aluminium block and aluminium cylinder head with cast iron cylinder liners. The redline remains at 6,500 rpm. Variable valve timing is fitted to both camshafts (called dual VANOS by BMW) and a dual length intake manifold (called "DISA" by BMW) is used.
There was no "technical update" (TU) version of the M54 produced, therefore the engine specifications remained the same throughout its 7-year production.
Maps BMW M54
Models
M54B22
The 2,171 cc (132 cu in) M54B22 produces 125 kW (168 hp) at 6100 rpm and 210 N?m (150 lb?ft) of torque at 3500 rpm. Bore is 80 mm (3.1 in), stroke is 72 mm (2.8 in) and the compression ratio is 10.8:1.
Applications:
- 2000-2006 E46 320i, 320Ci
- 2000-2003 E39 520i
- 2000-2002 E36/7 Z3 2.2i
- 2003-2005 E85 Z4 2.2i
- 2003-2005 E60/E61 520i
M54B25
The 2,494 cc (152 cu in) M54B25 produces 141 kW (189 hp) at 6000 rpm and 245 N?m (181 lb?ft) at 3500 rpm. Bore is 84 mm (3.3 in), stroke is 75 mm (3.0 in) and the compression ratio is 10.5:1.
Applications:
- 2000-2002 E36/7 Z3 2.5i
- 2000-2006 E46 325i, 325xi, 325Ci
- 2000-2004 E46/5 325ti
- 2000-2004 E39 525i
- 2003-2005 E60/E61 525i, 525xi
- 2003-2006 E83 X3 2.5i
- 2002-2005 E85 Z4 2.5i
M54B30
The 2,979 cc (182 cu in) M54B30 is the largest M54 variant and produces 170 kW (230 hp) at 5,900 rpm and 300 newton metres (220 lb?ft) at 3,500 rpm. Bore is 84 mm (3.3 in), stroke is 89.6 mm (3.5 in) and the compression ratio is 10.2:1.
In the United States and Canada, a "ZHP" version of the M54B30 used different camshafts and reprogrammed engine management to develop 175 kW (235 hp) at 5,900 rpm and 301 newton metres (222 lb?ft) at 3500 rpm and have a slightly higher redline of 6800 rpm (although the Canadian cars still show the limiter at 6500 rpm on the tachometer).
The M54B30 was on the Ward's 10 Best Engines list through 2001-2003.
Applications:
- 2000-2006 E46 330i, 330xi, 330Ci
- 2000-2004 E39 530i
- 2000-2002 E36/7 Z3 3.0i
- 2003-2005 E60 530i
- 2002-2005 E85 Z4 3.0i
- 2003-2006 E83 X3 3.0i
- 2000-2006 E53 X5 3.0i
- 2002-2005 E65/E66 730i, 730Li
- Wiesmann MF 30
S54
The S54 was marketed as the high performance equivalent to the M54, however it is actually more an evolution of the BMW S50 and shares few parts with the M54. As per the S50, the engine block is made of cast iron (unlike the aluminium engine block used by the M54). Redline is 8,000 rpm.
Compared with the S50, the S54 features:
- Bore increased to 87 mm (3.4 in), resulting in a displacement of 3,246 cc (198.1 cu in)
- Revised camshafts with variable valve timing (called "VANOS" by BMW) now also used on the exhaust camshaft
- Compression ratio increased from 11.3:1 to 11.5:1
- Siemens MSS 54 Engine control unit
- Electronic throttle control
- Scavenging oil pump (to avoid oil starvation during cornering)
There is no direct successor to the S54, however the following generation of M3 is powered by the BMW S65 naturally aspirated V8 engine.
S54B32
Variations in power and torque outputs are often due to country-specific emissions regulations, or space constraints of a chassis affecting the layout of the intake/exhaust system.
Applications:
- 2000-2006 E46 M3 -- produces 252 kW (338 hp) and 365 N?m (269 lb?ft). Models for the United States and Canada produce 248 kW (333 hp) and 355 N?m (262 lb?ft).
- 2000-2002 E36/7 M Roadster, E36/8 M Coupe -- produces 239 kW (321 hp) and 354 N?m (261 lb?ft). Models for the United States and Canada produce 235 kW (315 hp) and 341 N?m (252 lb?ft).
- 2002-2011 Wiesmann MF 3 Roadster -- produces 256 kW (343 hp) and 365 N?m (269 lb?ft).
- 2006-2008 E85 M Roadster, E86 M Coupe -- produces 252 kW (338 hp) and 365 N?m (269 lb?ft). Models for the United States and Canada produce 246 kW (330 hp) and 355 N?m (262 lb?ft).
S54B32HP
An upgraded version of the S54 engine was used in the E46 M3 CSL. This engine is designated S54B32HP and the changes include a revised intake made from carbon fiber, revised camshafts, a MAP sensor (instead of the MAF sensor used in the regular S54), a lightweight exhaust manifold with a straighter air path (which later become standard on the regular S54) and a straightened intake manifold.
Applications:
- 2003 E46 M3 CSL 265 kW (360 PS), 370 N?m (270 lb?ft)
See also
- List of BMW engines
References
Source of article : Wikipedia
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