Original BMW Oil Filter Housing Plug Seal Kit for BMW E30 325, 325e, 325es, 325i, 325is, 325iX, and M3 (1984–1993)

BMW gasket set 11-42-9-059-338 is the Original BMW seal kit that reseals the oil filter housing plug, located just above the thermostat, on the E30 BMW 325, 325e, 325es, 325i, 325is, 325iX, and M3. The kit comes with an O-ring and a retainer clip. The plug seal fails with age and must be replaced to keep the housing free of leaks. The kit weighs about 20 grams, is made in Austria, and BMW's parts data shows it in production from March 1990. A plug seal of this kind is a rubber ring squeezed between the plug and the housing bore, with the clip holding the plug against oil pressure.

Original BMW Parts carry a 24-month parts warranty.

BMW calls this part a gasket set, which is why it can be hard to find under its store name. The same kit covers both engine families in this fitment: the M20 six-cylinder in the 325 range and the S14 four-cylinder in the M3.

Technical Details

• Manufacturer: BMW (Original BMW part)
• Part number: 11-42-9-059-338
• BMW part name: gasket set
• Contents: O-ring and retainer clip
• Location: oil filter housing plug, above the thermostat
• Weight: 20 g (0.71 oz)
• Production start: March 1990
• Made in Austria
• Warranty: 24 months on Original BMW Parts

Common Questions

What comes in the kit?
An O-ring and a retainer clip.

Do I need to remove the oil filter housing?
It is recommended, because the space around the plug makes in-place replacement difficult.

Why does this plug leak?
The seal fails with age and must be replaced to stop the leak.

Fitment & Compatibility

Compare your production year and trim against the table below. PMB Performance has spent over 20 years matching parts to vehicles and can verify this against your VIN.