National 513106 Wheel Bearing - Front or Rear

Overview of National 513106 Wheel Bearing

The National 513106 wheel bearing is engineered for precision and durability, designed specifically for select Audi, BMW, Porsche, and Saab models. This double row angular contact bearing ensures reliable driveline performance and smooth wheel rotation for vehicles such as the Audi 80 Quattro, BMW 328i, and Porsche Boxster.

• Double row angular contact design for enhanced load capacity
• 42 mm (1.654 inch) bore diameter for precise fitment
• Outer diameter of 75 mm (2.953 inches) for compatibility with specified models
• 37 mm (1.457 inch) width ensuring proper seating and stability
• Inner and outer race radii optimized for durability and performance

Technical Specifications and Design Features

The National 513106 wheel bearing features a double row angular contact design, which provides superior axial and radial load handling compared to single row bearings. The inner race bore measures 42 mm (1.654 inches), matching the outer diameter of the axle shaft for a secure fit. Both the inner and outer races have a width of 37 mm (1.457 inches), contributing to the bearing's robust structure. The outer race outside diameter is 75 mm (2.953 inches), ensuring compatibility with the wheel hub assemblies of compatible vehicles. The inner race radius of 3 mm (0.118 inches) and outer race radius of 0.5 mm (0.020 inches) are engineered to reduce stress concentrations and extend service life.

Compatible Vehicles and Applications

This wheel bearing is compatible with a range of European vehicles, including:

• Audi models: 80 Quattro, 4000 Quattro, 5000 Quattro, Quattro
• BMW models: 128i, 318i, 318is, 320i, 323Ci, 323i, 323is, 325Ci, 325e, 325es, 325i, 325is, 325iX, 328Ci, 328i, 328is, Z3, Z4
• Porsche models: 911, Boxster
• Saab models: 900, 9000

Use the National 513106 wheel bearing to maintain proper wheel alignment and driveline efficiency in these vehicles.

Common Issues Addressed by National 513106 Wheel Bearing

• Eliminates wheel noise caused by worn or damaged bearings
• Prevents wheel wobble and vibration during driving
• Reduces uneven tire wear due to improper bearing function
• Restores smooth wheel rotation and handling performance
• Helps avoid potential axle and hub damage from bearing failure

Installation Notes and Tips

Proper installation of the National 513106 wheel bearing is critical for optimal performance. Ensure the bearing is pressed in evenly without applying excessive force to avoid damage. Clean the hub and axle surfaces thoroughly before installation to prevent contamination. Use appropriate tools designed for wheel bearing installation and torque specifications as per the vehicle manufacturer’s guidelines. It is recommended to inspect related components such as seals and hubs during replacement.

Quality Assurance and Warranty

National wheel bearings are manufactured to meet stringent quality standards, ensuring reliable performance and durability. The 513106 part is designed to meet OEM specifications for the listed vehicle models. While specific warranty details may vary, National typically offers coverage against manufacturing defects to provide confidence in the product’s longevity and function.