BMW M54B22

BMW M54B22The BMW M54B22 is a 2.2 liters (2,171 cc, 132.5 cu·in) straight-six, four-stroke cycle natural aspirated gasoline engine from BMW M54-family. The engine was manufactured on Munich Plant (Munich, Germany) from 2000 to 2006.

The BMW M54B22 engine features a cast-aluminum alloy cylinder block with cast-iron cylinder liners. The aluminum cylinder head uses chain-driven double overhead camshafts (DOHC) and four valves per cylinder (24 valves in total). It is equipped with a Siemens MS 43 engine management system, dual VANOS (Variable Valve Timing System from BMW) for both inlet and exhaust camshafts, fully electronic throttle without mechanical backup, dual length intake manifold (called “DISA” by BMW), a distributorless ignition system with individual ignition coils for each cylinder and an electronically controlled thermostat.

An 80.0 mm (3.15 in) cylinder bore and 72.0 mm (2.83 in) piston stroke give the M54B22 engine a total of 2,171 cc (132.5 cu·in) of displacement. Compression ratio rating is 10.7:1. This engine produced 170 PS (125 kW; 168 HP) at 6,100 rpm of maximum horsepower and 210 N·m (21.4 kg·m, 154.8 ft·lb) at 3,500 rpm of peak torque.

The breakdown of the engine code is as follows:

  • M54 – Engine Family
  • B – Gasoline
  • 22 – 2.2 Liter Displacement

General information

Engine Specifications
Engine codeM54B22
LayoutFour stroke, Inline-6 (Straight-6)
Fuel typeGasoline
Production2000-2006
Displacement2.5 L, 2,171 cc (132.5 cu·in)
Fuel systemFuel injection system
Power adderNone
Max. horsepower170 PS (125 kW; 168 HP) at 6,100 rpm
Max. torque210 N·m (21.4 kg·m, 154.8 ft·lb) at 3,500 rpm
Firing order1-5-3-6-2-4
Dimensions (L x H x W):
Weight130 kg (286.6 lbs)

Cylinder block

The M54B22 engine used cast aluminum alloy cylinder block with cast-iron cylinder liners, bore is 80.0 mm (3.15 in) and the piston stroke is 72.0 mm (2.83 in). The compression ratio rating is 10.7:1.

Cylinder block
Cylinder block alloyAluminum alloy
Compression ratio:10.7:1
Cylinder bore:80.0 mm (3.15 in)
Piston stroke:72.0 mm (2.83 in)
Number of piston rings (compression / oil):2 / 1
Number of main bearings:7
Cylinder inner diameter (standard):80.000-80.010 mm (3.1496-3.15 in)
Piston skirt diameter (standard):79.980-79.993 mm (3.1488-3.1493 in)
Piston pin outer diameter:22.000 mm (0.8661 in)
Piston ring side clearance:Top0.020-0.060 mm (0.0008-0.0024 in)
Second0.020-0.060 mm (0.0008-0.0024 in)
Oil0.020-0.060 mm (0.0008-0.0024 in)
Piston ring end gap:Top0.100-0.300 mm (0.0039-0.0118 in)
Second0.200-0.400 mm (0.0079-0.0157 in)
Oil0.250-0.500 mm (0.0098-0.0197 in)
Crankshaft journal diameter:60.000 mm (2.3622 in)
Crankpin diameter:45.000 mm (1.7717 in)

Cylinder head

The cylinder head is made of an aluminum alloy with good cooling efficiency. The M54B22 engine uses chain-driven double overhead camshafts and four valves per cylinder. Standart head height is 140.0 mm (5.5118 in). This engine is equipped with dual VANOS (Variable Camshaft Timing) system. VANOS is fully variable and operates independently on both intake and exhaust sides.

Intake valves are 30.0 mm (1.1811 in) in diameter and exhaust valves are 27.0 mm (1.063 in). Valve clearance is set by self-adjusting (zero-lash) hydraulic lifters for reduced valve noise and the elimination of routine valve adjustment.

Cylinder head
Cylinder head alloyAluminum
Valve Arrangement:DOHC, chain driven
Valves:24 (4 valves per cylinder)
Intake/Exhaust duration:
Valve head diameter:INTAKE33.0 mm (1.2992 in)
EXHAUST30.5 mm (1.2008 in)
Valve steam diameter:INTAKE6.0 mm (0.2362 in)
EXHAUST6.0 mm (0.2362 in)

Head tightening procedure and torque specs:

  • Step 1: 40.0 Nm; 4.1 kg·m; 29.5 ft·lb
  • Step 2: Turn all bolts 90°
  • Step 3: Turn all bolts another 90°

Maintenance data

Compression pressure
Minimum10.0 kg/cm2 (9.9 bar, 145 psi) / 350 rpm
Compression differential limit between cylinders:1.0 kg/cm2 (1.0 bar, 15 psi) / 350 rpm
Oil system
Recommended engine oil SAE 5W-30
Oil typeBMW LL-98 or LL-01
Engine oil capacity (Refill capacity)~ 6.5 L (6.87 US. qt, 5.72 Imp. qt.)
Oil change interval, km (miles)5,000-10,000 (3,000-6,000)
Ignition system
Spark plugBosch: FGR7DQP, NGK: BKR6EQUP
Spark plug torque:25 N·m (2.5 kg·m, 18.4 ft·lb)

Vehicle applications

ModelYears Produced
BMW 320i, 320Ci (E46)2000-2006
BMW 520i (E39)2000-2003
BMW Z3 2.2i (E36/7 )2000-2002
BMW Z4 2.2i (E85)2003-2005
BMW 520i (E60/E61)2003-2005
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