KNOLET Front Wheel Hub & Bearing Assembly 513121 — 5-Lug with ABS, Front Left/Right Fit for GM Cars

KNOLET 513121 is a direct-fit front wheel hub and bearing assembly with 5-lug pattern and integrated ABS sensor made to replace worn or noisy front hubs on a wide range of GM cars and trucks.

This precision-engineered wheel bearing hub assembly is built for front-left or front-right application across many Buick, Cadillac, Chevrolet, Pontiac, Oldsmobile and Saturn models. Designed to meet OEM-style dimensions and performance, the unit includes an ABS sensor, five wheel studs, and a corrosion-resistant finish. It addresses common wear issues such as vibration, noise and grease leakage while simplifying replacement with a ready-to-install hub.

Which vehicles does this KNOLET 513121 hub fit?

This hub was manufactured for specific General Motors platforms. Compatibility covers numerous model years and trims — always confirm your vehicle year, make and model before ordering. Fitment checks ensure the flange, bolt circle, pilot diameters and lug count match your original hub.

• Common fits: Chevy Impala (2000–2013), Monte Carlo (2000–2007), Venture (1997–2005).
• Also fits many Buicks: LaCrosse, Lucerne, Regal, Century and more.
• Cadillac models included: DeVille, DTS, Eldorado, Seville across listed years.
• Reference part numbers: 12429204, 25696347 and several OEM cross-references.

How does this assembly improve driving feel and safety?

A fresh hub and bearing assembly restores proper wheel alignment and eliminates play that causes steering wobble or uneven tire wear. The integrated ABS sensor maintains wheel-speed signal accuracy for your vehicle’s stability and braking systems.

• Precision bearings reduce friction and heat for smoother wheel rotation.
• High-hardness forged carbon steel improves impact resistance and handling.
• Sealed design prevents contamination and extends service life.
• Built-in ABS sensor preserves anti-lock braking functionality.

What are the key specifications I need to verify before buying?

Confirming a few physical measurements and features prevents mismatch at installation. The KNOLET 513121 lists flange, bolt circle and pilot diameters along with stud count and ABS inclusion to help you verify fitment quickly.

• Position: Front, left and right compatible.
• Flange diameter: 5.73 in; bolt circle diameter: 4.53 in; hub pilot diameter: 3.57 in.
• Wheel studs: 5-lug pattern; flange bolt holes: 3; brake pilot diameter: 2.78 in.
• Includes ABS sensor for vehicles equipped with electronic wheel-speed sensing.

How straightforward is installation and what should a technician expect?

The assembly comes pre-assembled and ready to mount, cutting install time versus separate bearing-and-hub jobs. Because it matches OEM dimensions, it fits into the knuckle with standard tools, though wheel hub replacement still requires proper torqueing and safety practices.

• Preassembled hub reduces press-fit labor and shop time.
• OE-style dimensions for straightforward bolt-on installation.
• Follow manufacturer torque specs and ABS connector routing during installation.
• Professional installation recommended for pressout/press-in removal on some vehicles.

Who is this for? KNOLET 513121 is intended for owners and technicians restoring front-end performance on compatible GM models who need a robust, OE-dimension replacement with an integrated ABS sensor. It suits drivers experiencing wheel noise, vibration, ABS warning lights, or those performing preventive front-hub maintenance. Make sure to use the site’s Confirmed Fit tool or check the vehicle fitment list to verify compatibility before purchasing.