KNOLET Wheel Hub Bearing Assembly 513301 for Audi A4/A5/A6 5-Lug w/ ABS — Front/Rear OEM-fit, Forged Steel

The KNOLET 513301 wheel hub bearing assembly is a direct-fit replacement (front or rear, 5-lug) engineered to restore smooth wheel rotation and ABS sensor function on compatible Audi models.

If your Audi shows wheel vibration, noise from the hub area, or an ABS warning light, the hub assembly is often the source. KNOLET’s 513301 unit is manufactured to OEM-style dimensions and includes the ABS sensor, hardened forged steel construction, and corrosion-resistant coatings to deliver reliable rotation, precise fitment, and long service life.

Which Audi models and years will this hub assembly fit?

This 513301 hub fits many Audi platforms across model years—confirm fitment using your vehicle’s year/make/model and the product’s ConfirmedFit tool before ordering. It covers front-only or front/rear applications depending on the specific model and year.

• Commonly compatible: A4 (2009–2015), A5 (2008–2015), A6 (2012–2015), Q5 (2010–2015)
• Also fits: S5/S6/S7/S8/RS5 models (select years 2013–2015 for some variants)
• Includes Quattro and Allroad listings — check vehicle-specific notes before purchase
• Reference part numbers: 4H0498625, 4H0498625A, 8K0598625 for cross-checking

How does the 513301 assembly improve driving feel and safety?

By replacing a worn hub, the 513301 assembly reduces hub noise, decreases steering or wheel shake, and restores proper ABS input when the integrated sensor is included. The result is steadier handling and improved braking responsiveness under normal driving conditions.

• Precision bearings reduce friction and rotational drag for smoother wheel spin
• Robust sealing prevents grease loss and keeps contaminants out of the bearings
• ABS sensor compatibility maintains electronic stability and braking systems
• High-hardness forged carbon steel ensures durability over rough roads

What are the key specifications and hardware details I should know?

The assembly is built to match OEM-style dimensions and includes the ABS sensor where specified. Confirm position (front/rear left or right) and verify bolt patterns and flange dimensions to ensure an exact fit for your vehicle.

• Position: Front or Rear, left and right axle options available
• Flange diameter: 5.59"; Bolt circle diameter: 4.41"; Hub pilot diameter: 4.02"
• Flange bolt holes: 4; Wheel studs: 5; Brake pilot diameter: 2.68"
• ABS sensor included to preserve wheel-speed sensing and system alerts

How straightforward is installation and what should a DIYer expect?

Installation is typically straightforward for technicians and experienced DIYers with the right tools. Because the part follows OEM dimensions, it usually slides into place with minimal modification, but proper torqueing and alignment procedures must be observed.

• Designed to OEM-style dimensions to simplify bolt-on replacement
• Anti-shock and low-friction design saves labor by reducing adjustment steps
• Follow factory torque specs and ABS sensor wiring routes during install
• Professional installation recommended if you lack bearing-press tools or torque equipment

Who is this for? KNOLET’s 513301 hub bearing assembly is aimed at Audi owners, independent mechanics, and repair shops seeking a robust, OEM-dimension replacement for worn or damaged wheel hubs on A4, A5, A6, A7, A8, Q5, Allroad and related Quattro models. If your vehicle exhibits hub noise, ABS faults, or wheel vibration, and you want a part with durable steel construction, a quality sealing system, and direct-fit compatibility, this assembly is intended for your repair or maintenance project.