Dorman 930-621 Wheel Bearing and Hub Assembly - Front or Rear

Reliable Wheel Bearing and Hub Assembly for GM Vehicles

The Dorman 930-621 wheel bearing and hub assembly is engineered to meet the specific needs of select Buick, Chevrolet, Pontiac, and Saturn models. Designed for durability and precise fitment, this assembly supports smooth wheel rotation and integrates with your vehicle's anti-lock braking system.

• Compatible with Buick Montana, Chevrolet Uplander, Pontiac Montana, Saturn Relay, and Terraza
• Includes 6 wheel studs sized 12mm for secure wheel mounting
• Equipped with a 33-spline hub for reliable driveline connection
• Features a triangular flange shape with 3 bolt holes (0.4 inch diameter)
• Anti-lock braking system (ABS) sensor included with 1 male connector and 2 terminals
• Wheel pilot diameter of 2.76 inches and brake pilot diameter of 3.6 inches for precise alignment
• Flange offset of 1.66 inches and bolt circle diameter of 4.52 inches

Technical Details and Specifications

The Dorman 930-621 hub assembly is designed with a 33-spline quantity to ensure a secure connection to the axle shaft. The assembly includes six 12mm wheel studs, which are pre-installed to facilitate straightforward wheel installation. The triangular flange shape with three bolt holes provides a stable mounting surface, while the flange diameter measures 4.53 inches. The hub pilot diameter of 2.78 inches and wheel pilot diameter of 2.76 inches help maintain proper wheel alignment and reduce vibration. This assembly also integrates an ABS sensor system with a male connector and two terminals, supporting your vehicle's safety features.

Compatible Vehicles and Applications

This wheel bearing and hub assembly is compatible with the following GM vehicles:

• Buick Montana
• Chevrolet Uplander
• Pontiac Montana
• Saturn Relay
• Saturn Terraza

It is designed to replace worn or damaged wheel bearing and hub assemblies, restoring proper wheel function and ABS sensor operation.

Common Issues Addressed by This Assembly

• Wheel vibration or wobbling during driving
• Unusual noises such as grinding or humming from the wheel area
• ABS warning light activation due to faulty sensor or hub
• Loose or damaged wheel studs affecting wheel security
• Uneven brake wear caused by misaligned hub or bearing

Installation Notes and Tips

Installation of the Dorman 930-621 wheel bearing and hub assembly requires proper tools and mechanical knowledge. Ensure the vehicle is securely lifted and supported before removing the old assembly. Verify that the ABS sensor connector is properly connected to avoid warning lights. Torque all flange bolts and wheel studs to manufacturer specifications. It is recommended to inspect related components such as brake rotors and calipers during installation.

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM standards for fit, form, and function. The 930-621 wheel bearing and hub assembly undergoes rigorous quality control to ensure durability and reliable performance. This product includes a limited warranty covering defects in material and workmanship, providing confidence in your replacement part.