Original BMW Oil Filler Tube O-Ring 36x3.4 mm for BMW 328d, 328d xDrive, and X3 xDrive28d (2014–2018)

This Original BMW O-ring, part 11-12-8-510-539, seals the oil filler tube to the valve cover on the N47N diesel in the BMW 328d, 328d xDrive, and X3 xDrive28d. It is a 36 x 3.4 mm ring weighing 1 g, and BMW has produced the part since March 2010. When this ring loses its seal, oil can seep around the filler neck, and that seepage is commonly mistaken for oil spilled during a top-up.

Original BMW Parts carry a 24-month parts warranty.

O-rings at a filler joint hold a static seal between two parts that are pushed together, using rubber compression rather than a flat gasket. BMW calls this one simply an O-ring, sized 36X3.4. BMW's parts data assigns the ring to the N47N and the higher-output N47S1 across many diesel 1, 2, 3, 4, 5 Series, X1, X3, and X5 models, which makes it a common shared part. The ring is sold individually and is made in Ireland.

Technical Details

• Manufacturer: BMW
• Part number: 11-12-8-510-539
• BMW name: O-ring
• Size: 36 x 3.4 mm
• Weight: 1 g (0.04 oz)
• Production start: March 2010
• Position: between valve cover and oil filler tube
• Sold individually
• Made in Ireland
• Warranty: 24-month parts warranty

Common Questions

Why is there oil around my 328d oil filler neck?
A leaking filler tube O-ring can leave oil there and is often mistaken for oil spilled while topping up. This ring seals the tube to the valve cover.

What size is this O-ring?
BMW specifies 36 x 3.4 mm.

Fitment & Compatibility

Check the table below for the exact year, model, submodel, and any listed notes. PMB Performance has spent over 20 years matching parts to vehicles and can verify this against your VIN.