Timken HA590157 Wheel Bearing and Hub Assembly - Front or Rear

Timken Hub Bearing Assembly for GM Front and Rear Applications

Timken HA590157 is a wheel bearing and hub assembly built for select Chevrolet, Pontiac, Buick, and Saturn applications. It is engineered with OE-developed testing, low runout design, premium sealing, and precision bearing surfaces to support smooth wheel rotation, reduced noise, and stable braking performance.

Key Features

• Wheel bearing and hub assembly for driven axle applications
• 33 spline quantity with 6 wheel studs
• 3-bolt mounting flange design
• Low runout construction to reduce noise and vibration
• Premium seals with reinforced outer case and contamination exclusion features
• Precision bearing profiles and enhanced surface finishes for load capacity and bearing life
• ABS sensor is 100% tested for wheel speed monitoring
• Cross-reference: SKF BR930627

Detailed Description

Timken HA590157 is a direct-fit hub bearing assembly for select GM vehicles, including Chevrolet Uplander, Pontiac Montana, Buick Terraza, and Saturn Relay applications. It uses precision internal geometry, uniform bearing surfaces, and a sealed design to help maintain consistent wheel support under everyday driving loads. The hub’s 115 mm bolt circle, 146 mm flange diameter, 91.45 mm hub pilot diameter, and 42 mm flange offset are key dimensions for proper fitment on the specified vehicles. This part number, HA590157, is built to meet the demands of front and rear positions listed in the fitment data, including Pontiac Montana front applications with the 3-bolt mounting flange and brake code 1ZF note.

Vehicle Fitment

• Fits 2006-2009 Chevrolet Uplander, front.
• Fits 2006-2009 Pontiac Montana, front. 3-bolt mounting flange - brake code 1ZF.
• Fits 2006-2007 Buick Terraza, front.
• Fits 2006-2007 Saturn Relay, front.
• Fits 2006 Buick Terraza, rear.
• Fits 2006 Chevrolet Uplander, rear.
• Fits 2006 Pontiac Montana, front. 3-bolt mounting flange - brake code 1ZF.
• Fits 2006 Pontiac Montana, rear.
• Fits 2006 Saturn Relay, rear.

Common Repair Uses

• Wheel bearing noise from worn internal components
• Hub play or looseness at the wheel end
• ABS warning light caused by a failing wheel speed sensor circuit
• Vibration or runout felt through the steering or chassis
• Uneven braking feel related to hub wear

Installation Notes and Tips

Confirm the vehicle position, brake code, and mounting flange style before installation. Verify the spline count, bolt circle diameter, wheel pilot diameter, and brake pilot diameter against the original hub assembly to ensure correct fitment. Because this assembly includes an ABS sensor, inspect the wheel speed wiring and connector condition during replacement. For best results, clean the mounting surface and torque fasteners to the vehicle manufacturer’s specifications.

Quality Assurance

Timken uses OE-developed testing and controlled manufacturing processes for hub bearing assemblies. The design emphasizes low runout, premium sealing, precision bearing geometry, and tested ABS sensor performance to support consistent operation in the specified Chevrolet Uplander, Pontiac Montana, Buick Terraza, and Saturn Relay applications.