SKF BR930603 Wheel Bearing and Hub Assembly - Front

SKF BR930603 Wheel Bearing Hub Assembly

SKF BR930603 is a front wheel bearing and hub assembly engineered for specific Mazda 3 applications. It is built to the dimensional standards needed for proper wheel-end fitment, including a 1.039 inside diameter, 2.677 brake pilot diameter, 3.070 hub pilot diameter, and 5.433 flange diameter.

Compatible With 2010-2013 Mazda 3, front, as well as 2005 Mazda 3, front, through 12/04 and 2004 Mazda 3, front, through 12/04. The SKF BR930603 is a direct-fit replacement for drivers and repair shops servicing front wheel bearing and hub assembly needs on these Mazda 3 model years.

Key Features

• Wheel bearing and hub assembly for front axle applications
• Inside diameter: 1.039
• Brake pilot diameter: 2.677
• Hub pilot diameter: 3.070
• Flange diameter: 5.433
• OE-focused design from SKF, a long-time supplier of wheel-end components
• Part number: BR930603

Detailed Description

SKF BR930603 is designed for Mazda 3 front wheel-end service where correct hub geometry and bearing support are critical. The listed dimensions help ensure proper alignment at the wheel mounting surface, brake pilot interface, and hub center, which are key factors in maintaining smooth rotation and accurate fitment. SKF has supplied wheel bearing and hub assemblies to original equipment programs worldwide for decades, and this replacement unit reflects that engineering approach for service work on the Mazda 3.

This part cross-references 3N612C300AD for the same application. If you are replacing a worn front hub on a 2010-2013 Mazda 3 or an early-production 2004-2005 Mazda 3, BR930603 provides the correct fitment reference for the specified front position.

Common Issues This Part Addresses

• Front wheel bearing noise such as humming or growling
• Excessive wheel play or looseness at the hub
• Uneven wheel-end rotation caused by bearing wear
• Improper hub-to-brake interface from a worn assembly
• Front-end vibration related to hub or bearing deterioration

Installation Notes and Tips

Verify the vehicle year and production cutoff before ordering, especially for 2004 and 2005 Mazda 3 models noted as through 12/04. Confirm the hub pilot, brake pilot, and flange dimensions match the original part before installation. Inspect related components such as the knuckle, axle nut, and brake hardware for wear or damage during service, and follow the vehicle manufacturer’s torque specifications during assembly.

Quality Assurance

SKF manufactures wheel bearing and hub assemblies to high quality standards and has a long history in wheel-end technology. BR930603 is built for long service life and safety-focused replacement on the specified Mazda 3 front applications.