Timken HA590085 Wheel Bearing and Hub Assembly - Front

Timken Front Wheel Bearing Hub Assembly

Timken HA590085 is a front wheel bearing and hub assembly for select GM applications, including Chevrolet Impala, Pontiac Grand Prix, and Chevrolet Monte Carlo models. Built with OE-developed testing and precision manufacturing controls, this hub assembly is engineered for stable wheel support, reduced noise, and consistent ABS wheel-speed monitoring.

Key Features

• Front driven wheel bearing and hub assembly
• 33-spline design with 5 wheel studs
• 4.528 in. bolt circle diameter and 5-bolt wheel mounting pattern
• Low runout construction to reduce noise and vibration
• Premium seals with contamination control features for longer service life
• Precision bearing geometry and enhanced surface finish for load support and efficiency
• ABS sensor function is 100% tested for wheel-speed monitoring

Detailed Description

Timken HA590085 is a direct-fit front hub assembly for vehicles that require a driven front wheel bearing unit with integrated ABS monitoring. It is engineered with precision internal geometry, uniform bearing surfaces, and reinforced sealing features to help maintain smooth rotation and dependable braking response. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application. For shoppers searching for a front wheel bearing hub assembly for a 2000-2008 Chevrolet Impala, 2004-2008 Pontiac Grand Prix, or 2003-2007 Chevrolet Monte Carlo, HA590085 is the relevant Timken part number to verify against the vehicle’s original hub specifications.

What It Helps Address

• Wheel bearing noise from a worn front hub assembly
• Steering vibration caused by excessive hub runout
• ABS warning concerns related to wheel-speed signal issues
• Uneven braking feel linked to hub instability
• Premature bearing wear from contamination or seal failure

Installation Notes and Tips

Confirm the vehicle’s front hub dimensions, spline count, bolt circle, and ABS configuration before installation. This part is listed for front applications on 2000-2008 Chevrolet Impala, 2004-2008 Pontiac Grand Prix, 2003-2007 Chevrolet Monte Carlo, 2003-2006 Buick Rendezvous, 2005 Buick Allure, 2003-2005 Buick Century, 2005 Buick LaCrosse, 2003-2005 Pontiac Aztek, 2003-2005 Pontiac Montana, 2003-2004 Buick Regal, and 2003 Chevrolet Malibu. Fitment also includes 2003 Pontiac Grand Prix, front, wheel seal - 2nd design. Verify hub pilot diameter, wheel pilot diameter, brake pilot diameter, and flange offset against the original part before service.

Quality Assurance

Timken uses OE-developed testing and controlled manufacturing processes for hub bearing assemblies. The design emphasizes low runout, precision bearing profiles, and tested ABS sensor performance to support consistent operation in daily driving conditions.