Why the B58 is Different
Unlike older BMW engines, the B58 uses a closed-deck design for extreme durability. It also simplified the accessory drive and improved the thermal management.
- Closed-deck block for higher boost tolerance.
- Water-to-air intercooler integrated into the manifold.
- Sturdy VANOS and Valvetronic systems.
Known Issues to Watch
Even a 'masterpiece' has flaws. The most common reports involve the cooling system and the plastic oil filter housing.
- Coolant loss from the turbo cooling lines or expansion tank cap.
- Oil filter housing cracking (plastic component).
- PCV diaphragm failure on higher mileage engines.