If you have a 1999 BMW 323i (M52 TU) and it’s leaking oil, this is a very common issue with this era of engines, also know as the E46 development body style.
To repair this symptom correctly, you must do one of two things: replace the valve cover, or the valve cover gasket.
It’s not uncommon for these plastic valve covers to crack after 10+ years of usage.
As far as availability there isn’t much choice besides going with the dealership or a trusted BMW parts store.
When you do this repair on the 1999 BMW 323i M52, it’s also recommended you replace the valve cover gasket, spark plug seals, nut seals, grommets, and copper sealing washers.
Recommended: E46 Valve Cover Gasket
Flat Head Screwdriver
3/8 Extensions (6″+)
TORX 30 Socket
Optional: Drei Bond Sealing Compound 1209
Estimated repair cost
Estimated repair time
1 hour 30 minutes
Removal and Installation Guide