BMW M54
| BMW M54 engine | |
|---|---|
 |
|
| Overview | |
| Manufacturer | BMW, Bayerische Motoren Werke AG |
| Production | 2000–2006 |
| Combustion chamber | |
| Configuration | Straight-6 |
| Chronology | |
| Predecessor | BMW M52 |
| Successor | BMW N52 |
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 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:
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 141 kW (189 hp) at 6000 rpm and 245 N·m (181 lb·ft) of torque at 3500 rpm.
Applications:
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.
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