The BMW M54 is a naturally aspirated straight-6 DOHC petrol engine produced from 2000 to 2006. It was released in the E53 X5 (called "double-VANOS"), a dual length intake manifold (called "DISA") is used and the thermostat is electronically controlled. The redline remains at 6,500 rpm.
Differing from the M52TÜ however, the M54 has a non-return fuel system, a fully electronic throttle (without mechanical backup), Siemens MS43 engine management, and a revised intake manifold. The displacement of the largest variant increased from 2.8 L to , due to an increase in stroke to . There was no "technical update" (TÜ) version of the M54 produced, therefore the engine specifications remained the same throughout its seven-year production run.
Versions
{|class="wikitable sortable"
|-
!Version !! Displacement !! Power !! Torque !! Years
|-
!M54B22
||| <br/> at 6,100 rpm || <br/> at 3,500 rpm || 2000–2006
|-
!M54B25
||| <br/> at 6,000 rpm || <br/> at 3,500 rpm || 2000–2006
|-
!M54B30
||| <br/> at 5,900 rpm || <br/> at 3,500 rpm || 2000–2006
|-
!S54B32
||| <br/> at 7,900 rpm || <br/> at 4,900 rpm || 2000–2008
|}
M54B22
The M54B22 produces at 6,100 rpm and at 3,500 rpm. Bore is , stroke is 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 M54B25 produces at 6,000 rpm and at 3,500 rpm.
In the United States and Canada, a "ZHP" version of the M54B30 used different camshafts and reprogrammed engine management to develop at 5,900 rpm and at 3,500 rpm and have a slightly higher redline of 6,800 rpm (although the Canadian cars still show the limiter at 6,500 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
- 2000–2002 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 , resulting in a displacement of
- Revised camshafts
- Finger follower valve actuation instead of bucket-style tappets
- Compression ratio increased from 11.3:1 to 11.5:1
- Siemens MSS54 engine control unit (MSS70 in the later Z4 M)
- Electronic throttle control
- Scavenging oil pump to avoid oil starvation during cornering (this was also present on the S50B30 of the E36 M3 GT and the S50B32, but not the regular S50B30)
There is no direct successor to the S54, since the following generation E90/E92/E93 M3 was powered by the V8 BMW S65 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 at 7,900 rpm and at 4,900 rpm. Models for the United States and Canada produce and .
- 2000–2002 E36/7 Z3 M Roadster, E36/8 M Coupé — produces and . Models for the United States and Canada produce and .
- 2002–2011 Wiesmann MF 3 Roadster — produces and .
- 2006–2008 E85 Z4 M Roadster, E86 Z4 M Coupé — produces and - Engine code 326S4. Models for the United States and Canada produce and . The Z4 M's engine uses a Siemens MSS70 control unit.
S54B32HP
thumb|S54B32HP engine in BMW-Museum, Munich.
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),
;Applications
- 2003 E46 M3 CSL ,
- 2009 Wiesmann MF 3 Roadster "20th Anniversary Edition" — produces ,
See also
- List of BMW engines