BMW M54

BMW M54 engine
Overview
Production 2000–2006
Layout
Configuration Straight-6
Valvetrain DOHC
Chronology
Predecessor BMW M52
Successor BMW N52

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[1] and is the replacement for the M52.

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. The M54 began to be phased out following the introduction of the N52 in 2004.

Design

Compared with the final versions of its M52 predecessor (called M52TU), the M54 has a non-return fuel system, a fully electronic throttle[1] (without mechanical backup), an electronically controlled thermostat,[2] Siemens MS 43 engine management,[3] a revised intake manifold[4] 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[5] (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.

Models

EngineDisplacementPowerTorqueYears
M54B222,171 cc (132 cu in)125 kW (168 hp)
@ 6100 rpm		210 N⋅m (155 lb⋅ft)
@ 3500 rpm		2000–2006
M54B252,494 cc (152 cu in)141 kW (189 hp)
@ 6000 rpm		245 N⋅m (181 lb⋅ft)
@ 3500 rpm		2000–2006
M54B302,979 cc (182 cu in)170 kW (228 hp)
@ 5900 rpm		300 N⋅m (221 lb⋅ft)
@ 3500 rpm		2000–2006
S54B323,246 cc (198 cu in)256 kW (343 hp)
@ 7900 rpm		365 N⋅m (269 lb⋅ft)
@ 4900 rpm		2000–2008

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.[6] 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.[6] 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.[6] Bore is 84 mm (3.3 in), stroke is 89.6 mm (3.5 in) and the compression ratio is 10.2:1.[7]

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).[8][9]

The M54B30 was on the Ward's 10 Best Engines list through 2001-2003.[10]

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

BMW S54 engine
Overview
Production 2000–2008
Layout
Configuration Straight-6
Valvetrain DOHC
Chronology
Predecessor BMW S50
Successor None

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.[11] As per the S50, the engine block is made of cast iron (unlike the aluminium engine block used by the M54).[12] Redline is 8,000 rpm.

Compared with the S50, the S54 features:[11][13][14]

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 (343 PS; 338 hp) at 7900 rpm and 365 N⋅m (269 lb⋅ft) of torque at 4900 rpm. 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).[15]
  • 2006–2008 E85 Z4 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

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),[3] a lightweight exhaust manifold with a straighter air path (which later become standard on the regular S54) and a straightened intake manifold.[16]

Applications
  • 2003 E46 M3 CSL 265 kW (360 PS; 355 bhp), 370 N⋅m (273 lb⋅ft)

See also

References

  1. 1 2 "Bmw m54 Engine". scribd.com. Retrieved 17 June 2016.
  2. ↑ John G.Burns. "The UnixNerd's Domain - BMW M50 M52 M54 Engines". Unixnerd.demon.co.uk. Retrieved 2016-07-17.
  3. 1 2 "BMW World - M54 Engine". usautoparts.net. Archived from the original on 15 November 2013. Retrieved 17 October 2017.
  4. ↑ "BMW M54 and S54 engines". australiancar.reviews. Retrieved 10 October 2017.
  5. ↑ "The BMW Six Cylinder Guide". AutoSpeed.com. Retrieved 2012-11-22.
  6. 1 2 3 "Information on M54 engines". BMWHeaven.com. Retrieved July 4, 2018.
  7. ↑ "BMW M54B30 Engine". mywikimotors.com. Retrieved 17 October 2017.
  8. ↑ "BMW 330i with Performance Package - Road Test - Car Reviews". Car and Driver. 2003-09-01. Retrieved 2016-07-17.
  9. ↑ "Frequently Asked Questions (FAQ) About the BMW E46 330 ZHP Performance Package Option". zhpmafia.com. Retrieved 17 July 2016.
  10. ↑ Visnic, Bill (2003-01-01). "10 Best Engines | News & Analysis content from". WardsAuto.com. Retrieved 2016-07-17.
  11. 1 2 "FAQ E46 M3". bmwmregistry.com. Retrieved 19 October 2017.
  12. ↑ "BMW S54 Engine". mywikimotors.com. Retrieved 19 October 2017.
  13. ↑ "Jalopnik: 'Dear BMW, Why Did You Retire the S54B32 Engine?'". bmwblog.com. Retrieved 19 October 2017.
  14. ↑ "BMW YouTube channel - The BMW M3 (E46) film. Everything about the third generation BMW M3". Retrieved 19 October 2017 – via YouTube.com.
  15. ↑ Adams, Lawrence. "Official: Wiesmann Roadster MF3 Final Edition by Sieger". GTspirit. Retrieved 2016-07-17.
  16. ↑ "BMW M3 CSL Performance". Automobile Magazine. Archived from the original on 4 June 2009. Retrieved 2009-07-10.
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