BMW Rear Differential Bearing & Seal Rebuild Kit – OEM Drivetrain Rebuild Replacement for E38, E39 & E46 Models | Fits STC4690 Applications

Restore smooth and reliable rear differential operation with this premium Rear Differential Bearing and Seal Rebuild Kit for select BMW 3 Series, 5 Series, and 7 Series models. Designed for differential overhaul and repair applications, this kit includes the essential bearings, seals, and service components needed to rebuild worn rear differential assemblies and restore proper drivetrain performance.

Over time, differential bearings and seals can wear due to mileage, heat, load stress, and fluid contamination. Common symptoms include whining noises, vibration, gear noise during acceleration or deceleration, fluid leaks, and excessive drivetrain play. Replacing worn differential components helps restore smooth operation, reduce noise, and extend the service life of the differential assembly.

Manufactured to OEM-style specifications, this rebuild kit is engineered for precise fitment, durability, and dependable performance. The included bearings and seals are designed to withstand demanding operating conditions while maintaining proper gear alignment and lubrication.

Whether you are performing a complete differential rebuild, repairing drivetrain noise, or restoring rear axle performance, this comprehensive kit provides the essential components required for a professional-quality repair.

Key Features:

• Complete Rear Differential Bearing and Seal Rebuild Kit: Includes the essential service components needed to rebuild and refresh worn rear differential assemblies.
• Restores Differential Performance and Reliability: Helps bring back smoother operation and improved drivetrain stability.
• Helps Eliminate Differential Whining and Drivetrain Noise: Ideal for addressing common wear-related rear-end noise and vibration.
• Supports Proper Gear Alignment and Operation: Fresh bearings and seals help maintain correct internal differential function.
• Helps Prevent Differential Fluid Leaks: Replacing worn seals helps protect the differential from oil loss and contamination.
• OEM-Style Fitment and Quality: Designed for dependable fitment and rebuild performance on compatible BMW applications.
• Durable Bearing and Seal Construction: Built to withstand heat, load, and long-term drivetrain stress.
• Ideal for Differential Rebuilds and Repairs: A smart solution for noisy, leaking, or aging rear axle differentials.

FITMENT:

• BMW 3 Series – E46 (1999–2006)
  Compatible with 320i, 323i, 325i, 328i, and 330i models.
• BMW 5 Series – E39 (1996–2003)
  Compatible with 520i, 523i, 525i, 528i, and 530i models.
• BMW 7 Series – E38 (1994–2001)
  Compatible with 728i, 730i, and 740i models.

Position: Rear Axle Differential Assembly

Please verify your vehicle fitment, differential type, and existing component configuration before purchasing.

Fits Reference:
STC4690
ST4690-3

Please refer to the “Fitment” section in the product description for compatibility details.