BMW M54

BMW M54 engine
File:BMW M54B25 002.jpg
Overview
Manufacturer	BMW, Bayerische Motoren Werke AG
Production	2000–2006
Combustion chamber
Configuration	Straight-6
Chronology
Predecessor	BMW M52
Successor	BMW N52, BMW N54

The BMW M54 is a straight-6 DOHC piston engine which replaced the M52 and was produced from 2000-2006. There was no "technical update" (TU) version of the M54 produced, therefore the engine specifications remained the same throughout its 7 year production. The M54 began to be phased out following the introduction of the BMW N52 in 2004.

The main differences between the M54 and its M52TU predecessor are the non-return fuel system, a fully electronic throttle (without mechanical backup), an electronically controlled thermostat and that the North American engines no longer use an iron block. The M54 uses an aluminium block and aluminium cylinder head with cast iron cylinder liners and, like the M52TU, the M54 features variable valve timing to both camshafts (called dual VANOS by BMW) and a dual length intake manifold (called "DISA" by BMW).

The E46 M3 is powered by the S54 engine series, which is an evolution of the S50B32, itself being based on the M50. It still features an iron block as opposed to the aluminium M54.

Models

Engine	Displacement	Power	Torque	Redline	Bore	Stroke	Compression ratio	Year
M54B22	2,171 cc (132 cu in)	125 kW (168 hp) @ 6100 rpm	210 N·m (155 lb·ft) @ 3500	6500	80 mm (3.1 in)	72 mm (2.8 in)	10.8:1	2000
M54B25	2,494 cc (152 cu in)	141 kW (189 hp) @ 6000 rpm	237 N·m (175 lb·ft) @ 3500	6500	84 mm (3.3 in)	75 mm (3.0 in)	10.5:1	2000
M54B30	2,979 cc (182 cu in)	170 kW (228 hp) @ 5900 rpm	300 N·m (221 lb·ft) @ 3500	6500	84 mm (3.3 in)	89.6 mm (3.5 in)	10.2:1	2000
S54B32	3,246 cc (198 cu in)	256 kW (343 hp) @ 7900 rpm	365 N·m (269 lb·ft) @ 4900	8000	87 mm (3.4 in)	91 mm (3.6 in)	11.5:1	2000

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.

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 M54B25 is a 2,494 cc (152 cu in) engine with an 84 mm (3.3 in) bore and 75 mm (3.0 in) stroke. Output is 143 kW (192 hp) at 6000 rpm and 237 N·m (175 lb·ft) of torque at 3500 rpm.

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

At 2,979 cc (182 cu in), the M54B30 is the largest M54 engine. The extra capacity is achieved using an increased stroke of 89.6 mm (3.5 in). Power is 170 kW (230 hp) at 5,900 rpm and torque is 300 newton metres (220 lb·ft) at 3,500 rpm. There was also a slightly more powerful version of the M54B30 that could be ordered as part of the M Performance package in Canada or the Performance package in the USA. This engine 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

S54

File:BMW S54B32 Engine.JPG

BMW S54 engine

The S54 is the high performance equivalent to the M54, which was used in the E46 M3, Z3 M Coupé / Roadster, and the E85 Z4 M Roadster / E86 M Coupe. The S54 is technically an evolution of the iron-block S50B32. It shares few major components with the S50 and differences include:

• Increased cylinder bore to 87 mm (from 86.4 mm) for a new total displacement of 3,246 cc (from 3,201 cc)
• Modified camshafts
• High pressure Double VANOS continuously variable valve timing system with faster operation at high rpm
• Increased compression to 11.5:1 (from 11.3:1)
• More advanced BMW/Siemens MSS 54 engine management control
• Finger-type rocker arms for reduced reciprocating mass and friction
• One-piece aluminum head casting for lighter weight
• Scavenging oil pump to maintain pressure during heavy cornering

S54B32

Applications:

• 2000-2006 E46 M3 (except North America) 252 kW (338 hp; 343 PS), 365 N·m (269 lb·ft)
• 2000-2006 E46 M3 (North America only) 248 kW (333 hp; 337 PS), 355 N·m (262 lb·ft)
• 2000-2002 E36/7 Z3M (except North America) 239 kW (325 PS), 354 N·m (261 lb·ft)
• 2000-2002 Z3 M Coupé / Roadster (North America only) 235 kW (315 hp), 341 N·m (252 lb·ft)
• 2002-2011 Wiesmann Roadster MF3 256 kW (348 PS), 365 N·m (269 lb·ft)
• 2003 E46 M3 CSL 265 kW (360 PS), 370 N·m (270 lb·ft)
• 2006-2008 E85/E86 Z4M (except North America) 252 kW (343 PS), 365 N·m (269 lb·ft)
• 2006-2008 E85/E86 Z4M (North America only) 246 kW (330 hp), 355 N·m (262 lb·ft)

S54B32HP

The upgraded S54 engine used in the E46 M3 CSL, officially designated S54 B32HP, has a high flow carbon fiber air intake, modified valve and camshaft timing, and a retuned DME using a MAP sensor instead of the MAF sensor found in a standard M3. However, the engine is further modified in order to reduce weight – it features a lightweight exhaust manifold (made standard on late models of the normal M3) and thinner exhaust piping. Additionally, the intake and exhaust manifolds are slightly straightened to improve engine responsiveness.

See also

• BMW engines
• BMW N52