Moog 512221 Wheel Bearing and Hub Assembly - Rear

Rear Wheel Bearing Hub Assembly for GM Applications

The MOOG 512221 wheel bearing and hub assembly is built for rear axle service on select Pontiac, Buick, and Chevrolet vehicles. It combines hub and bearing functions in one assembly for a direct replacement on applications such as the Pontiac Grand Prix, Chevrolet Impala, and Buick Regal.

Key Features

• Rear wheel bearing and hub assembly
• 5 wheel studs with a 4-bolt flange pattern
• Flange diameter: 150.500 mm
• Flange offset: 64.800 mm
• Bolt circle diameter: 115.000 mm / 4.530 in
• Wheel pilot diameter: 70.100 mm
• Brake pilot diameter: 70.500 mm
• Hub pilot diameter: 71.800 mm
• Rectangular flange shape
• Anti-lock brake sensor not included

Detailed Description

MOOG 512221 is a rear wheel bearing and hub assembly engineered for service replacement on 2000-2005 Chevrolet Impala, 2003-2005 Chevrolet Monte Carlo, 2001-2005 Pontiac Aztek, 2003-2008 Pontiac Grand Prix, 2003-2004 Buick Regal, 2004-2005 Buick Century, 2005 Buick Allure, and 2005 Buick LaCrosse. This part number is also referenced as MOOG Hub Assemblies 512221 and cross-references SKF BR930026 for the same application. MOOG focuses on design updates that improve part life and make replacement easier, which is why this hub assembly is a practical choice for rear wheel service on GM platforms.

Common Repair Uses

• Rear wheel bearing noise or growl
• Wheel play or looseness at the hub
• Uneven hub rotation or rough bearing feel
• ABS-related service where the sensor is serviced separately, since the sensor is not included
• Restoring proper rear wheel support on GM passenger cars and crossover applications

Installation Notes

Verify rear position, bolt circle, pilot diameters, and stud count before installation. Confirm that the vehicle does not require an integrated anti-lock brake sensor, since this assembly is supplied without one. Always compare the original hub dimensions and mounting pattern to MOOG 512221 before final assembly.

Quality Assurance

MOOG is known in the chassis and driveline market for ongoing design improvements that extend service life and simplify replacement. The 512221 hub assembly is built to meet the dimensional requirements of the listed rear applications and is backed by MOOG’s product engineering focus.