SKF 15803 Differential Pinion Seal - Front or Rear

SKF 15803 Differential Pinion Seal

SKF 15803 is a differential pinion seal built for driveline sealing performance where gear oil retention and contamination control matter. It is a LongLife sealing surface design with Viton noted across many BMW applications, and it is also listed for select Ford, Audi, Volvo, Volkswagen, Nissan, Lincoln, and Suzuki vehicles.

• Part number: SKF 15803
• LongLife sealing surface type for durable sealing performance
• Outside diameter: 2.054 in.
• Shaft diameter: 1.575 in.
• Width: 0.276 in.
• Designed to keep lubricant in and road contaminants out
• Fits front and rear applications depending on vehicle and drivetrain

Application Details

This differential pinion seal is used in driveline and axle sealing systems where the pinion shaft passes through the differential housing. SKF engineers its seals with application-specific materials and bonding methods to match the operating environment, helping maintain proper sealing under heat, motion, and fluid exposure. The SKF 15803 is a direct-fit option for many BMW front differential applications, including 2001-2005 BMW 330i, front; 2001-2005 BMW M3, front; and 1996-2002 BMW Z3, front. It also cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

• Fits 2001-2005 BMW 330i, front
• Fits 2001-2005 BMW M3, front
• Fits 1996-2002 BMW Z3, front
• Fits 1999-2004 Ford F-350 Super Duty, rear
• Fits 2000-2001 Audi TT Quattro, rear

What This Seal Helps Address

• Gear oil seepage at the differential pinion area
• Contamination entering the differential housing
• Seal wear from age, heat, and driveline movement
• Leaks that can lead to low lubricant level
• Noise or driveline concerns associated with poor sealing

Installation Notes and Tips

Confirm the shaft diameter, outside diameter, and width before installation to match the differential housing and pinion shaft. Clean the sealing surface thoroughly and inspect the pinion yoke or shaft for wear, scoring, or corrosion before installing the new seal. Verify the vehicle-specific position and drivetrain notes, especially on BMW Viton applications and Ford rear axle listings such as ZF transmission-related fitments.

Quality Assurance

SKF has a long history in seal design and manufacturing, with products built to specific dimensions and material requirements for the application. The 15803 is produced to SKF quality standards for consistent sealing performance and long service life.