National 1979 Wheel Seal - Front, Front Inner or Rear Outer

Overview of National 1979 Wheel Seal for BMW and Nissan

The National 1979 wheel seal is engineered to provide reliable sealing performance for various BMW and Nissan models, including the 325i, M3, Maxima, and Frontier. Designed with precision dimensions and durable polyacrylate material, this oil seal helps maintain driveline integrity and prevent leaks.

• Inside diameter: 1.772 inches (45.000 mm)
• Outside diameter: 2.957 inches (75.100 mm)
• Thickness/width: 0.472 inches (12.000 mm)
• Sealing material: Polyacrylate for enhanced durability
• Clockwise-spiral lip design for effective sealing
• Compatible with housing bore of 2.953 inches (75.000 mm)
• Part type: Wheel seal, series 1000, type 47

Technical Details and Material Specifications

This National 1979 wheel seal is constructed from polyacrylate, a material known for its resistance to heat, oil, and wear, making it suitable for demanding automotive applications. The seal features a clockwise-spiral lip design that ensures a tight fit around the shaft and housing bore, minimizing the risk of oil leakage. With an inside diameter of 1.772 inches (45 mm) and an outside diameter of 2.957 inches (75.1 mm), it fits precisely in compatible BMW and Nissan driveline assemblies.

Compatible Vehicles and Applications

This wheel seal is compatible with a range of BMW models such as the 325i, 325is, 325iX, M3, 530i, 535i, 635CSi, and 735i, as well as Nissan models including the 200SX, Maxima, Frontier, Xterra, and D21 Pickup. The part number 1979 ensures you are selecting the correct seal for these specific applications, supporting proper driveline function and longevity.

Common Issues Addressed by the National 1979 Wheel Seal

• Prevents oil leaks from wheel hubs and axle assemblies
• Reduces contamination from dirt and debris entering the driveline
• Maintains proper lubrication within the axle housing
• Minimizes premature wear of axle components
• Helps avoid costly driveline repairs due to seal failure

Installation Notes and Tips

• Ensure the housing bore and shaft are clean and free of debris before installation
• Use appropriate tools to press the seal evenly into the housing bore without distortion
• Verify the seal’s orientation matches the clockwise-spiral lip design for optimal sealing
• Check shaft diameter compatibility (1.772 inches) to avoid improper fit
• Inspect the seal after installation for any signs of damage or misalignment

Quality Assurance and Warranty Information

National wheel seals, including part number 1979, are manufactured to meet industry standards for durability and performance. The polyacrylate material and precise engineering contribute to consistent sealing under normal operating conditions. While specific warranty details may vary, National typically offers coverage against manufacturing defects to ensure customer confidence in their products.