Ajusa 31-51-1-213-527 Differential Side Cover O-Ring Front AWD

The Ajusa 31-51-1-213-527 is a precision-engineered differential side cover O-ring designed for the front differential assembly in all-wheel drive (AWD) BMW vehicles. This critical sealing component prevents differential fluid leakage from the side cover, ensuring proper lubrication and protection of internal differential components.

Key Features:

• Direct replacement for BMW OEM part number 31-51-1-213-527
• Manufactured by Ajusa, a trusted European supplier of sealing solutions
• High-quality elastomer construction resists differential fluid and temperature extremes
• Precision-molded dimensions ensure proper fitment and sealing performance
• Essential component for differential service, side cover removal, or leak repair

This O-ring is commonly replaced during differential fluid changes, side cover gasket replacement, or when addressing differential fluid leaks. Proper installation with clean mating surfaces is essential for optimal sealing performance.