National 510078 Wheel Bearing - Front

National 510078 Wheel Bearing Overview

The National 510078 wheel bearing is engineered for reliable driveline performance in select Hyundai and Kia vehicles. Designed as a double row angular contact bearing, it offers precise fitment and durability for models like the Hyundai Elantra and Kia Spectra.

• Double row angular contact design for enhanced load capacity
• Outer diameter of 2.913 inches (74 mm) for exact fit
• Inner race bore measures 1.535 inches (39 mm) ensuring proper axle alignment
• Width of 1.417 inches (36 mm) for stable wheel rotation
• Compatible with Hyundai Elantra, Kia Spectra, Spectra5, and Tiburon

Technical Specifications and Design Features

This National wheel bearing (part number 510078) features a double row angular contact design, which provides improved axial and radial load handling compared to single row bearings. The bearing’s bore size is 1.496 inches (38 mm), with an inner race bore of 1.535 inches (39 mm) and an inner race width of 1.417 inches (36 mm). The outer race outside diameter is 2.913 inches (74 mm) with a width of 1.339 inches (34 mm). These precise dimensions ensure a secure fit and smooth operation within the driveline assembly of compatible Hyundai and Kia vehicles.

Compatible Vehicles and Applications

This wheel bearing is specifically designed for use in the following vehicles:

• Hyundai Elantra
• Kia Spectra
• Kia Spectra5
• Kia Tiburon

It is ideal for replacing worn or damaged wheel bearings in these models, maintaining proper wheel alignment and driveline efficiency.

Common Issues Addressed by National 510078 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 due to bearing failure
• Maintains proper axle alignment and driveline stability

Installation Notes and Tips

When installing the National 510078 wheel bearing, ensure the hub and spindle surfaces are clean and free of debris. Use proper tools to press the bearing into place without damaging the races. Verify the bearing is seated correctly and rotates smoothly before reassembling the wheel components. It is recommended to follow the vehicle manufacturer’s torque specifications and installation procedures for optimal performance.

Quality Assurance and Warranty

National wheel bearings are manufactured to meet strict industry standards for durability and performance. The 510078 bearing is part of the Fwdb series and features an E-3 type design, ensuring consistent quality. While specific warranty details may vary, National typically offers coverage against manufacturing defects to provide confidence in the product’s reliability.