SKF BR930621 Wheel Bearing and Hub Assembly - Front

Overview of SKF BR930621 Wheel Bearing and Hub Assembly

The SKF BR930621 is a precision-engineered wheel bearing and hub assembly designed for select BMW models. This component ensures reliable wheel rotation and supports vehicle stability, making it essential for maintaining optimal driveline performance on BMW 120i, 135i, Z4, and other compatible models.

• Wheel Pilot Diameter: 2.854 inches
• Brake Pilot Diameter: 3.120 inches
• Hub Pilot Diameter: 3.543 inches
• Flange Shape: Modified rectangular (Mod-rectan)
• Flange Offset: 2.007 inches
• Flange Diameter: 5.787 inches

Technical Details and Specifications

The SKF BR930621 wheel bearing and hub assembly features a wheel pilot diameter of 2.854 inches, providing precise alignment for the wheel hub. The brake pilot diameter measures 3.120 inches, ensuring proper fitment with brake components. The hub pilot diameter of 3.543 inches supports the hub's secure mounting to the axle. The flange shape is modified rectangular (Mod-rectan), which contributes to the assembly's structural integrity and fitment accuracy. Additionally, the flange offset of 2.007 inches and flange diameter of 5.787 inches are designed to match the specific requirements of compatible BMW models, including the 120i, 125i, 128i, 130i, 135is, 323i, 325i, 328i, 335d, 335i, 335is, X1, and Z4.

Compatible BMW Models and Applications

This wheel bearing and hub assembly is compatible with a range of BMW vehicles, including the 120i, 125i, 128i, 130i, 135i, 135is, 323i, 325i, 328i, 335d, 335i, 335is, X1, and Z4 models. The part number BR930621 is specifically designed to meet the fitment and performance requirements of these vehicles, ensuring proper installation and function within the driveline and axle system.

Common Issues Addressed by SKF BR930621

• Eliminates wheel bearing noise and vibration
• Resolves wheel hub looseness or play
• Prevents uneven tire wear caused by faulty bearings
• Restores proper wheel alignment and rotation
• Improves braking performance by maintaining brake pilot alignment

Installation Notes and Tips

When installing the SKF BR930621 wheel bearing and hub assembly, ensure the vehicle is securely lifted and supported. Clean the mounting surface thoroughly before installation to avoid contamination. Use the correct torque specifications for flange bolts to maintain proper flange offset and alignment. It is recommended to inspect related components such as wheel studs and brake rotors during installation to ensure overall system integrity.

Quality Assurance and Warranty

SKF manufactures the BR930621 wheel bearing and hub assembly to meet stringent quality standards. This part undergoes rigorous testing to ensure durability and performance under normal operating conditions. While specific warranty details may vary, SKF typically offers coverage against manufacturing defects, providing confidence in the reliability of this component for your BMW 120i, 135i, Z4, and other compatible models.