BMW M54
Template:Infobox automobile engine The BMW M54 is a naturally aspirated straight-6 DOHC petrol engine produced from 2000 to 2006. It was released in the E53 X5<ref name="scribd"/> and is the replacement for the M52 engine. The S54 is the equivalent high-performance engine, used in the E46 M3, the Z3 M Coupé/Roadster and the E85/E86 Z4 M. The BMW M56 SULEV engine (sold in several states of the United States) is based on the M54.
The M54 was phased out following the introduction of the BMW N52 engine in 2004. From 2001 to 2003, the M54 was included on the Ward's 10 Best Engines.
Design
Compared with the final versions of its M52 predecessor (called the 'M52TÜ'), the M54 has a non-return fuel system, a fully electronic throttle (without mechanical backup),<ref name= "scribd">Template:Cite web</ref><ref>Template:Cite web</ref> Siemens MS 43 engine management,<ref name= "usautoparts">Template:Cite web</ref> and a revised intake manifold.<ref>Template:Cite web</ref> The displacement of the largest variant increased from 2.8 L to Template:Convert, due to an increase in stroke to Template:Convert.
As per the M52TÜ, the M54 uses an aluminium block and aluminium cylinder head with cast iron cylinder liners. Variable valve timing is fitted to both camshafts<ref>Template:Cite web</ref> (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.
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
| Version | Displacement | Power | Torque | Years |
|---|---|---|---|---|
| M54B22 | Template:Cvt | Template:Convert at 6,100 rpm |
Template:Convert at 3,500 rpm |
2000–2006 |
| M54B25 | Template:Cvt | Template:Convert at 6,000 rpm |
Template:Convert at 3,500 rpm |
2000–2006 |
| M54B30 | Template:Cvt | Template:Convert at 5,900 rpm |
Template:Convert at 3,500 rpm |
2000–2006 |
| S54B32 | Template:Cvt | Template:Convert at 7,900 rpm |
Template:Convert at 4,900 rpm |
2000–2008 |
M54B22
The Template:Convert M54B22 produces Template:Convert at 6,100 rpm and Template:Convert at 3,500 rpm.<ref name="bmwheaven">Template:Cite web</ref> Bore is Template:Convert, stroke is Template:Convert 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 Template:Convert M54B25 produces Template:Convert at 6,000 rpm and Template:Convert at 3,500 rpm.<ref name=bmwheaven /> Bore is Template:Convert, stroke is Template:Convert 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 Template:Convert M54B30 is the largest M54 variant and produces Template:Convert at 5,900 rpm and Template:Convert at 3,500 rpm.<ref name=bmwheaven /> Bore is Template:Convert, stroke is Template:Convert and the compression ratio is 10.2:1.<ref>Template:Cite web</ref>
In the United States and Canada, a "ZHP" version of the M54B30 used different camshafts and reprogrammed engine management to develop Template:Convert at 5,900 rpm and Template:Convert 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).<ref>Template:Cite web</ref><ref>Template:Cite web</ref>
The M54B30 was on the Ward's 10 Best Engines list through 2001–2003.<ref>Template:Cite web</ref>
- 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
Template:Infobox automobile engine
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.<ref name="m-registry E46 M3">Template:Cite web</ref> As per the S50, the engine block is made of cast iron, unlike the aluminium engine block used by the M54.<ref>Template:Cite web</ref> Redline is 8,000 rpm.
Compared with the S50, the S54 features:<ref name="m-registry E46 M3"/><ref>Template:Cite webTemplate:Dead link</ref><ref>Template:Cite web</ref>
- Bore increased to Template:Convert, resulting in a displacement of Template:Convert
- 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 Template:Cvt at 7,900 rpm and Template:Convert at 4,900 rpm. Models for the United States and Canada produce Template:Convert and Template:Convert.
- 2000–2002 E36/7 Z3 M Roadster, E36/8 M Coupé — produces Template:Cvt and Template:Convert. Models for the United States and Canada produce Template:Convert and Template:Convert.
- 2002–2011 Wiesmann MF 3 Roadster — produces Template:Cvt and Template:Convert.<ref>Template:Cite web</ref><ref>Template:Cite web</ref>
- 2006–2008 E85 Z4 M Roadster, E86 Z4 M Coupé — produces Template:Cvt and Template:Convert - Engine code 326S4. Models for the United States and Canada produce Template:Convert and Template:Convert. The Z4 M's engine uses a Siemens MSS70 control unit.<ref>Template:Cite web</ref>
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),<ref name="usautoparts"/> a lightweight exhaust manifold with a straighter air path (which later became standard on the regular S54) and a straightened intake manifold.<ref name="CSLperformance">Template:Cite web</ref>
- Applications
- 2003 E46 M3 CSL Template:Cvt, Template:Convert<ref>Template:Cite web</ref>
- 2009 Wiesmann MF 3 Roadster "20th Anniversary Edition" — produces Template:Cvt, Template:Convert