Timken HA590116 Wheel Bearing and Hub Assembly - Rear

Timken Rear Wheel Bearing Hub Assembly

Timken HA590116 is a rear wheel bearing and hub assembly for select Chevrolet, Pontiac, Buick, and Saturn vehicles with a 4-bolt mounting flange. Built with OE-developed testing and controlled manufacturing processes, it is engineered for consistent wheel-end performance, reduced runout, and stable braking response.

• Rear wheel bearing and hub assembly for non-driven applications
• 4-bolt mounting flange with 6 wheel studs
• Bolt circle diameter: 115.02 mm / 4.528 in.
• Wheel pilot diameter: 70.00 mm / 2.756 in.
• Brake pilot diameter: 70.61 mm / 2.780 in.
• Hub pilot diameter: 71.80 mm / 2.827 in.
• Flange diameter: 150.59 mm / 5.928 in.
• Flange offset: 65.00 mm / 2.559 in.
• ABS sensor tested for wheel-speed monitoring

Fitment and Application Details

Compatible with rear applications on 2006-2009 Chevrolet Uplander, 2006-2009 Pontiac Montana, 2006-2007 Buick Terraza, 2006-2007 Saturn Relay, and 2005-2006 Pontiac Montana. This part number, HA590116, also cross-references SKF BR930631 and MOOG Hub Assemblies 512309 for the same application.

Timken HA590116 is built around precision bearing profiles, uniform internal geometry, and refined surface finishes to support load capacity and bearing life. The low-runout design helps reduce noise and vibration at the wheel end, while the sealing system uses a reinforced outer case, ribbed inner diameter, contamination exclusion features, and vent holes to support sealing integrity during installation and service.

What This Hub Assembly Helps Address

• Wheel bearing noise from a worn rear hub assembly
• Vibration or roughness felt from the rear wheel end
• ABS warning concerns related to wheel-speed signal issues
• Brake performance changes caused by excessive hub runout
• Loose or unstable wheel-end operation on the rear axle

Installation Notes

Verify rear position, 4-bolt mounting flange configuration, and all hub dimensions before installation. Confirm the vehicle’s brake code and wheel-end specifications on Pontiac Montana applications, especially 2006-2009 rear fitments with non brake code 1ZF. Clean the mounting surface, inspect the knuckle and brake components for wear, and follow the vehicle service procedure for torque and ABS sensor connection.

Quality Assurance

Timken uses OE-developed testing to control design, materials, and manufacturing processes for hub bearing assemblies. The ABS sensor is 100% tested for wheel-speed monitoring, and the sealing and bearing construction are engineered to support consistent performance in rear wheel-end service.