Dorman 917-538 ABS Wheel Speed Sensor Tone Ring - Front Left or Front Right

OE-Style ABS Tone Ring Replacement

Dorman 917-538 is an ABS wheel speed sensor tone ring made from steel for a direct replacement on select Audi applications. It restores the toothed trigger surface used by the wheel speed sensor to read wheel rotation, helping maintain accurate ABS signal output on the front axle.

Built to match the original ring’s dimensions and tooth count, this tone ring is a practical repair for Audi A8, A8 Quattro, A6 Quattro, and S8 models with front left or front right fitment. The Dorman 917-538 offers a direct-fit solution for vehicles that need a replacement ABS tone ring without replacing larger assemblies.

Key Features

• Steel construction for durability in brake and hub environments
• Direct replacement for the original equipment ABS wheel speed sensor tone ring
• 45-tooth design for proper wheel speed signal generation
• Inside diameter: 3.03 in; outside diameter: 3.19 in
• Width: 0.43 in for OE-style fitment
• Fits front left and front right positions on select Audi models
• Part number 917-538 for easy identification

Detailed Description

This ABS wheel speed sensor tone ring is engineered as a cost-effective replacement for the factory ring on select Audi vehicles. It is used on the front left and front right positions for 1997-1999 Audi A8, 1997-2003 Audi A8 Quattro, 1998-2004 Audi A6 Quattro, and 2001-2003 Audi S8. The steel construction and OE-matched dimensions support consistent sensor pickup where the original ring has worn, cracked, or corroded. If you are sourcing a Dorman 917-538 for an Audi A8 Quattro front left or front right repair, this part provides the correct tooth count and sizing for the listed applications.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What It Helps Fix

• ABS warning light caused by a damaged tone ring
• Erratic wheel speed sensor readings from a cracked or corroded ring
• ABS pulsation or fault codes related to inconsistent wheel speed input
• Loss of proper trigger signal at the front wheel hub
• Repair needs on Audi A8, A8 Quattro, A6 Quattro, or S8 front axle applications

Installation Notes and Tips

Confirm the vehicle year, model, and front left or front right position before ordering. Inspect the wheel speed sensor, hub area, and surrounding brake components for wear or contamination during service. Proper seating and alignment of the tone ring are important for accurate sensor reading, so compare the replacement ring to the original part before installation.

Quality Assurance

Dorman manufactures replacement parts to directly replace original equipment components on specific vehicle applications. This tone ring is built to match the listed dimensions and tooth count for the confirmed Audi fitments.