Elring 063.665 Differential Seal

Elring Differential Seal for Audi and Volkswagen

Elring 063.665 is a differential seal built for driveline sealing applications where precise dimensions and reliable oil control matter. With a 45.0 mm inside diameter, 60.0 mm outside diameter, and 8 mm height, it matches a wide range of Audi and Volkswagen front and rear axle applications.

This Elring 063.665 seal uses ACM (polyacrylate) material and an ASW radial shaft seal design with a dust lip to help keep contaminants out of the sealing area. It is a direct-fit option for many Audi A4, A6, S4, and Quattro models, as well as select Volkswagen Passat, Phaeton, and Golf applications.

Key Features

• Elring differential seal, part number 063.665
• ACM (polyacrylate) sealing material for driveline use
• 45.0 mm inside diameter, 60.0 mm outside diameter, 8 mm height
• Radial shaft seal design: ASW
• Dust lip helps protect the sealing edge from debris
• Swirl type: WD
• Cross-reference: Beck/Arnley 052-3891

Detailed Description

Built for differential and axle sealing service, Elring 063.665 is specified for a broad range of European vehicles that use the same seal dimensions and profile. It is a strong match for long-tail searches such as Audi A4 Quattro front differential seal, Audi A6 Quattro axle seal, and Volkswagen Passat rear differential seal. The seal’s ACM construction is suited to driveline environments where heat and fluid exposure are common, while the dust lip adds an extra barrier against road contamination. If you are replacing a leaking seal on an Audi S4, Audi A4, or Audi A6, this part number provides the size and design details needed for an accurate replacement.

Common Problems This Seal Addresses

• Differential fluid seepage at the shaft or axle interface
• Contamination entering the sealing area from road dust and debris
• Oil residue around the differential housing
• Seal wear caused by age, heat, and driveline movement
• Noise or driveline issues related to low fluid level from leakage

Installation Notes and Tips

• Verify the seal dimensions before installation: 45.0 mm ID, 60.0 mm OD, 8 mm height.
• Inspect the shaft surface for grooves, corrosion, or scoring before fitting the new seal.
• Clean the housing bore thoroughly so the seal seats evenly.
• Lubricate the sealing lip with the correct fluid during installation to reduce dry start-up wear.
• Confirm vehicle position and application details, especially on Audi Quattro and Volkswagen driveline setups.

Quality Assurance

Elring is a recognized sealing-system manufacturer, and this differential seal is built to OE-style dimensional standards for the listed Audi and Volkswagen applications. Part number 063.665 is specified for multiple front and rear driveline positions, including Audi A4, A6, S4, and select Volkswagen models.

Compatible With: Fits 2002-2008 Audi A4, front; Fits 2002-2006 Audi A4 Quattro, front and rear; Fits 2002-2005 Audi A6, front; Fits 1996-2001 Audi A4, and Fits 1996-2001 Audi A4 Quattro.