National 510003 Wheel Bearing - Front or Rear

Overview of National 510003 Wheel Bearing

The National 510003 wheel bearing is engineered for reliable driveline performance in select Audi, Kia, Mazda, and Volkswagen vehicles. Designed with a double row angular contact configuration, this wheel bearing supports smooth rotation and durability for models such as the Audi TT, Volkswagen Beetle, and Mazda Miata.

• Double row angular contact design for enhanced load capacity
• Precise 1.575 inch (40 mm) bore and width dimensions
• Outer race diameter of 2.913 inches (74 mm) for secure fitment
• Compatible with multiple vehicle makes and models including Audi TT Quattro and Volkswagen Golf
• Part number 510003 ensures exact replacement and fit

Technical Specifications and Design Features

The National 510003 wheel bearing features a double row angular contact design, which provides improved axial and radial load handling compared to single row bearings. The inner race bore measures 1.575 inches (40 mm) with a width of 1.575 inches (40 mm), matching the outer race width and ensuring balanced load distribution. The outer race outside diameter is 2.913 inches (74 mm), designed to fit securely within the hub assembly. Inner race radius of 0.150 inches (3.8 mm) and outer race radius of 0.059 inches (1.5 mm) contribute to the bearing's precise fit and smooth operation. This E-3 type bearing is part of the Fwdb series, suitable for Gen1 applications.

Compatible Vehicles and Applications

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

• Audi models: TT, TT Quattro
• Kia models: Sephia, Spectra
• Mazda models: Miata, MX-3, Protege, Protege5
• Volkswagen models: Beetle, Beetle Cabrio, Golf, Golf City, Jetta

Using part number 510003 ensures proper fitment and performance for these specific vehicles, maintaining driveline integrity and wheel stability.

Common Issues Addressed by National 510003 Wheel Bearing

• Eliminates wheel noise caused by worn or damaged bearings
• Prevents wheel wobble and vibration during driving
• Restores smooth wheel rotation and handling
• Reduces uneven tire wear linked to bearing failure
• Maintains proper alignment and driveline performance

Installation Notes and Tips

When installing the National 510003 wheel bearing, ensure the hub and surrounding components are clean and free of debris. Use appropriate tools to press the bearing into place without damaging the races. Verify the bearing orientation matches the double row angular contact design specifications. It is recommended to inspect related seals and replace them if necessary to prevent contamination. Proper torque settings should be followed according to vehicle manufacturer guidelines to secure the bearing assembly.

Quality Assurance and Warranty

National wheel bearings are manufactured to meet industry standards for durability and performance. The 510003 bearing undergoes rigorous quality control to ensure dimensional accuracy and material integrity. While specific warranty details may vary, National typically offers coverage against manufacturing defects, providing confidence in the product's reliability for Audi, Kia, Mazda, and Volkswagen applications.