BMW M54B30

BMW M54B30The BMW M54B30 is a 3.0 liters (2,979 cc, 181.8 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 M54B30 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.

The cylinder bore is 84.0 mm (3.31 in) and the piston stroke is 89.6 mm (3.53 in). Compression ratio rating is 10.2:1. It produced 231 PS (170 kW; 228 HP) at 5,900 rpm of maximum horsepower and 300 N·m (30.6 kg·m, 221.1 ft·lb) at 3,500 rpm of peak torque.

The breakdown of the engine code is as follows:

  • M54 – Engine Family
  • B – Gasoline
  • 30 – 3.0 Liter Displacement

General information

Engine Specifications
Engine code M54B30
Layout Four stroke, Inline-6 (Straight-6)
Fuel type Gasoline
Production 2000-2006
Displacement 3.0 L, 2,979 cc (181.8 cu in)
Fuel system Fuel injection system
Power adder None
Max. horsepower 231 PS (170 kW; 228 HP) at 5,900 rpm
Max. torque 300 N·m (30.6 kg·m, 221.1 ft·lb) at 3,500 rpm
Firing order 1-5-3-6-2-4
Dimensions (L x H x W):
Weight 130 kg (286.6 lbs)

Cylinder block

The M54B30 cylinder block is cast aluminum alloy with cast iron cylinder liners, bore is 84.0 mm (3.31 in) and the piston stroke is 89.6 mm (3.53 in). The compression ratio rating is 10.2:1. The cylinders are exposed on all sides to circulating coolant. The forged steel counterweighted crankshaft rotates in replaceable split-shell main bearings. This engine used seven main bearings.

The forged steel connecting rods use replaceable split-shell bearings at the crankshaft end and solid bushings at the piston pin end. The pistons are of the three-ring type with two upper compression rings and a lower one-piece oil scraper ring. Full-floating piston pins are retained with circlips. The M54B30 use a graphite coating on the piston skirts to reduce friction and noise.

Cylinder block
Cylinder block alloy Aluminum alloy
Compression ratio: 10.2:1
Cylinder bore: 84.0 mm (3.31 in)
Piston stroke: 89.6 mm (3.53 in)
Number of piston rings (compression / oil): 2 / 1
Number of main bearings: 7
Cylinder inner diameter (standard): 84.000-84.010 mm (3.3071-3.3075 in)
Piston skirt diameter (standard): 83.995 mm (3.3069 in)
Piston pin outer diameter: 22.000 mm (0.8661 in)
Piston ring side clearance: Top 0.020-0.060 mm (0.0008-0.0024 in)
Second 0.020-0.060 mm (0.0008-0.0024 in)
Oil 0.015-0.060 mm (0.0006-0.0024 in)
Piston ring end gap: Top 0.200-0.400 mm (0.0079-0.0157 in)
Second 0.200-0.400 mm (0.0079-0.0157 in)
Oil 0.200-0.450 mm (0.0079-0.0177 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 M54B30 engine uses chain-driven double overhead camshafts and four valves per cylinder. Standart head height is 140.0 mm (5.5118 in). The cylinder head employs a crossflow design for greater power and efficiency. Intake air enters the combustion chamber from one side while exhaust gasses exit from the other. 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 33.0 mm (1.2992 in) in diameter and exhaust valves are 30.5 mm (1.2008 in). They have a duration of 240° for inlet and 244° for exhaust valves, valve lift are 9.7 mm (0.3818 in) and 9.0 mm (0.3543 in), respectively. 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 alloy Aluminum
Valve Arrangement: DOHC, chain driven
Valves: 24 (4 valves per cylinder)
Intake/Exhaust duration: 240°/244°
Valve head diameter: INTAKE 33.0 mm (1.2992 in)
EXHAUST 30.5 mm (1.2008 in)
Valve steam diameter: INTAKE 6.0 mm (0.2362 in)
EXHAUST 6.0 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
Minimum 10.0 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 type BMW 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 plug Bosch: FGR7DQP, NGK: BKR6EQUP
Spark plug torque: 25 N·m (2.5 kg·m, 18.4 ft·lb)

Vehicle applications

Model Years Produced
BMW 330i, 330xi, 330Ci (E46) 2000-2006
BMW 530i (E39) 2000-2004
BMW Z3 3.0i (E36/7 ) 2000-2002
BMW 530i (E60) 2003-2005
BMW Z4 3.0i (E85) 2002-2005
BMW X3 3.0i (E83) 2003-2006
BMW X5 3.0i (E53) 2000-2006
BMW 730i, 730Li (E65/E66) 2002–2005
Wiesmann MF 30 2000-2002
ATTENTION! Dear visitors, this site is not a trading platform, an official dealer or a spare parts supplier, so we do not have any price lists or spare parts catalogs. We are an information portal and provide the technical specifications of gasoline and diesel engines.

We try to use verified sources and official documentation, however, differences between sources or errors in entering information may occur. We do not provide advice on technical issues related to the engines operation or repair. We do not recommend using provided information for engines repairing engines or spare parts ordering, use only official service manuals and spare-parts catalogs.

2 Comments

  1. Hi! I have BMW X4 with a 2.0 litre Turbo diesel engine. Is it possible to replace this engine with a more powerful 3.0 Litre M54B30 engine like the one on your website that I have been studying ?

  2. You haven’t mentioned which exact generation and engine you have, so my answer might not be as full. Everything is possible if you have enough money. But will it be worth? Probably not.
    First is, those engines are different mechanically, so engine mounts will not be compatible, meaning you’d need to make one yourself, if it will be possible at all considering there’s enough room for various components and for example front suspension. If you have xDrive, stop there, there’s not even a point in continuing. As this goes further, your current transmission box won’t be mount compatible, so either conversion to older one or custom adapter mount to match with current one. Obviously, replacing fuel installation, with different pump and stuff is a must.
    It gets even funnier as you go further, as newer engines are quite heavilly dependent on various electronics. Mechanics are quite easy if you have a welder and enough duct tape, electronics even in OEM installations can be a nightmare. You will need to transplant whole old engine harness (ECU at least, to run the engine). Then either somehow make it work with current dashboard or replace it entirely with some older one, just to have gauges and indicators working. Possibility of making it compatible with other onboard MCUs – very slim.
    As a project – might be worth a shot, if you have lots of luck, time persistence and money (lots of money). Definitely not as a daily driver, mind you.
    For a more power in a user friendly package, either get a new car, or consider swapping with one of the engines that was offered for this car. Any mods strips you of one of the biggest advantage BMW have – VIN catalog. If you input VIN, catalog will tell you exact part number you need. No worries with compatibility. If you do any modifications, you and only you (and your mechanic, for that matter) know how you did this, so either exact part searching or manufacturing them yourself (happens sometimes).
    Last but not least, while M54 engines are quite reliable, they have their own share of problems. As an owner of a car with M54B30 (OEM), I can tell.

Leave a Reply

Your email address will not be published.


*