BMW B58 engine

This page is a draft. It has not been approved yet, so read it with care.

Watch out for

Reputation: what owners and the press report. Tap one to see what to check.

Coolant loss Every version One source so far

What to check: Look for blue or green residue at the water pump's weep hole and ask how often it needs topping up.

BMW Tuning says topping up every 10,000 to 15,000 miles is probably minor, and that water pumps can fail early but typically last to about 75,000 to 100,000 miles.

Sources ¹
Leaking valve cover gasket and PCV Every version One source so far

What to check: Look for oil on the spark plugs and smoke from around the valve cover.

BMW Tuning says leaks commonly develop around 70,000 to 100,000 miles, and that the PCV diaphragm built into the cover can crack.

Sources ¹