Timken HA590731 Wheel Bearing and Hub Assembly - Front

Timken Front Wheel Bearing Hub Assembly

Timken HA590731 is a front wheel bearing and hub assembly for select BMW applications, including BMW X3, 330i, 430i, 530e, 530i, 540i, M340i, and Z4 models. Built with OE-developed testing and precision manufacturing controls, this hub assembly is engineered for stable wheel support, low runout, and consistent braking feel.

For BMW front-end service, HA590731 combines bearing precision, sealing protection, and ABS wheel-speed monitoring in one direct replacement assembly. The result is a service part focused on smooth rotation, reduced vibration, and dependable sensor performance.

Key Features

• Front wheel bearing and hub assembly for non-driven applications
• Low runout design helps reduce noise and vibration
• Premium seals with reinforced outer case and contamination exclusion features
• Precision-profile bearings with uniform internal geometry and enhanced surface finishes
• 100% tested ABS sensor for wheel-speed monitoring
• 5 wheel studs, 4 flange bolt holes, 140.00 mm flange diameter
• Hub pilot diameter: 98.00 mm; wheel pilot diameter: 66.50 mm; brake pilot diameter: 67.00 mm

Detailed Description

Timken HA590731 is a front wheel bearing and hub assembly engineered for select BMW front axle service. It is a non-driven hub assembly with a 44.00 mm flange offset and a 5.511 in. flange diameter, built to support accurate wheel location and consistent rotation. Timken uses OE-developed testing to control the design, materials, and manufacturing process behind the assembly, helping maintain dimensional accuracy and performance over time. This part cross-references SKF BR931112 and 513406 for the same application.

Compatible With select BMW X3, 330i, 430i, 530e, 530i, 540i, M340i, and Z4 front applications, Timken HA590731 is a direct-fit service part for vehicles that require a front hub assembly with integrated ABS sensing. The bearing design, seal construction, and surface finish specifications are aimed at supporting smooth wheel movement and reliable wheel-speed signal output.

Common Issues This Part Can Address

• Front wheel bearing noise or growling
• Steering wheel or chassis vibration from hub runout
• ABS warning light caused by wheel-speed sensor issues
• Uneven braking feel related to hub or bearing wear
• Excessive play in the front wheel assembly

Installation Notes and Tips

Verify front axle fitment by year, model, and production cutoff before installation. This assembly is listed for BMW X3 front through 05/2021, BMW 330i front through 05/2021, BMW 430i front through 05/2021, BMW 530e front through 05/2021, BMW 530i front through 05/2021, BMW 540i front through 05/2021, BMW M340i front, and BMW Z4 front through 05/2021. Confirm hub pilot, wheel pilot, and brake pilot dimensions during service to ensure proper seating and alignment.

Use clean mounting surfaces and follow factory torque procedures during installation. Inspect related suspension and brake components if the original hub showed noise, vibration, or ABS faults before replacing the assembly.

Quality Assurance

Timken applies OE-developed test methods to control design, materials, and production for hub bearing assemblies. Premium seals, precision bearing geometry, and tested ABS sensor performance are used to support consistent operation in front-wheel service applications.