BMW Differential Seal/O‑Ring 31 51 1 213 527 (31511213527)

Description

The part number 31511213527 (also listed as 31 51 1 213 527) is a genuine BMW OEM O‑ring / seal used in the front differential / final drive assembly. fcpeuro.com+2Schmiedmann+2
Key details:

• It is identified as an O‑ring in the front differential by the output shaft, diameter ~ 39 mm. Schmiedmann+1

• Designed to seal the connection between the final drive housing and the output shaft on AWD/xDrive models, preventing gear‑oil leaks. fcpeuro.com+1

• Compatible with many BMW model chassis ranging from F‑series to G‑series, including BMW X series (X3 / X5) and many AWD/xDrive models according to parts listings. Schmiedmann+1

Compatibility Notes & Fitment:

• This O‑ring is used in front differential assemblies of BMW vehicles with xDrive (AWD) systems. Schmiedmann+1

• Vehicle model years span from early to more recent (2004‑2025) for applicable models. bmw.oempartsonline.com+1

• As always with sealing parts, ensure: correct differential variant, output shaft size, correct replacement part number, and proper installation to avoid leaks and differential damage.