BMW B58 Oil Filter Housing with Cooler

BMW’s B58 engine is known for its strength and reliability across multiple models, but like any design, it has a few weaknesses. One notable issue stems from BMW’s choice to manufacture the oil filter housing out of a plastic composite material. While this helped reduce weight and cost, plastic components often degrade over time, and the B58’s oil filter housing has proven to be a common failure point as these engines age.

Typical failure modes include:

• Oil filters breaking apart inside the housing (referenced in SIB 11 01 20)

• Cracked housings caused by over tightening the filter cap

• Oil leaks around the housing’s perimeter seals

• Oil and coolant cross-contamination due to internal deterioration

When these issues occur, the entire oil filter housing assembly must be replaced. The job requires removing the intake manifold/charge cooler assembly, the strut tower reinforcement brace, and several coolant and oil lines.

Additional notes:
For vehicles with automatic transmissions. Since the transmission cooler circuit must be opened, you’ll need to top off the fluid afterward with 8HP-compatible transmission fluid. You’ll also need the correct coolant (G48 blue or HT12 green, depending on your vehicle) and roughly 7 liters of engine oil.

Torque specifications:

• Oil-to-water cooler: 10 Nm

• Oil filter housing to engine block: 4 Nm (initial), 10 Nm (final)

• Engine oil drain plug: 25 Nm

• Transmission oil cooler to crankcase: 8 Nm

• Oil filter cap: 25 Nm

• Intake plenum to cylinder head: 5 Nm (initial), 10 Nm (final)

• Tension strut to body: 56 Nm + 90°

• Bracing plate to front axle support: 56 Nm + 90°

• Charge air duct to throttle body: 8 Nm

• Transmission fill plug: 35 Nm

Fitment: