National 225500 Wheel Seal - Front, Front Inner or Front Outer

Overview of National 225500 Wheel Seal

The National 225500 wheel seal is engineered to provide reliable sealing performance for driveline and axle applications. Designed with precision to fit specific Audi, BMW, and Volkswagen models, this oil seal helps maintain optimal lubrication and prevent contamination.

• Inside diameter: 2.165 inches (55.000 mm)
• Outside diameter: 2.689 inches (68.300 mm)
• Thickness/width: 0.315 inches (8.000 mm)
• Sealing material: durable nitrile for resistance to oil and wear
• Compatible housing bore: 2.677 inches (68.000 mm)
• Part number: 225500, Series 220000

Technical Details and Specifications

This National wheel seal (part number 225500) is constructed from nitrile, a material known for its excellent resistance to petroleum-based fluids and mechanical wear. The seal’s inside diameter of 2.165 inches (55 mm) and outside diameter of 2.689 inches (68.3 mm) ensure a precise fit on shafts and housing bores, minimizing leakage risks. With a thickness of 0.315 inches (8 mm), the seal maintains structural integrity under typical operating conditions. The 220000 series design supports consistent sealing performance in demanding driveline environments.

Compatible Vehicles and Applications

This wheel seal is compatible with a range of Audi, BMW, and Volkswagen vehicles, including models such as the Audi A8, BMW 335d, 535d, 535d xDrive, 740Ld xDrive, M3, RS6, Volkswagen Vanagon, and X5. It is specifically designed for driveline and axle sealing systems, making it suitable for maintenance or repair of these vehicles’ wheel hubs and axle assemblies.

• Prevents oil leaks in wheel hubs and axle assemblies
• Protects driveline components from dirt and moisture ingress
• Maintains lubrication integrity for extended component life
• Reduces risk of premature bearing failure
• Ensures proper sealing in high-performance and luxury vehicles

Installation Notes and Tips

When installing the National 225500 wheel seal, ensure the shaft and housing bore are clean and free of debris. Use appropriate tools to press the seal evenly into the housing bore without damaging the sealing lip. Verify the seal orientation matches the original installation to maintain effective sealing. Proper installation helps avoid leaks and extends the service life of the seal and related components.

Quality Assurance and Warranty

National wheel seals are manufactured to meet industry standards for durability and performance. The nitrile material and precise dimensions of part number 225500 contribute to reliable sealing under normal operating conditions. While specific warranty details are not provided, National products typically adhere to quality control processes to ensure consistent product reliability.