Hella 012806921 ABS Wheel Speed Sensor - Front, Front Left or Front Right

HELLA ABS Wheel Speed Sensor for Front Axle

Restore accurate wheel speed monitoring with this HELLA ABS wheel speed sensor, part number 012806921. Built for the front axle left or right side, it supports stable ABS operation by sending precise wheel movement data to the braking system.

Key Features

• Inductive sensor design for reliable wheel speed detection
• Front axle fitment for left or right side applications
• 960 mm cable length for proper routing on supported vehicles
• 2-pole electrical connection
• Prepared for wear indicator integration
• Direct replacement style for select Audi and Volkswagen models

Product Details

HELLA 012806921 is an ABS wheel speed sensor engineered for vehicles that require accurate front wheel speed input for anti-lock braking performance. The inductive sensor design measures wheel rotation and sends the signal needed for ABS control, helping the system respond correctly during braking events. This part is listed for select 1999-2005 Volkswagen Passat, 2001 Audi A4, 2000-2001 Audi A4 Quattro, and 2000-2001 Audi S4 front applications. This part cross-references Delphi SS20039 and Standard Ignition ALS429 for the same application.

As part of the HELLA line, this sensor reflects the brand’s focus on precise electrical and braking components for European vehicle platforms. The 012806921 part number is a practical choice when replacing a failed front ABS sensor on an Audi A4, Audi S4, or Volkswagen Passat with the listed configuration.

What It Helps Address

• ABS warning light caused by a faulty front wheel speed sensor
• Erratic or missing wheel speed signal at the front axle
• Brake control issues related to inaccurate wheel rotation data
• Stability and traction system faults tied to ABS input errors
• Intermittent sensor signal from damaged wiring or worn sensor internals

Installation Notes and Fitment

Fits 1999-2005 Volkswagen Passat, front; fits 2001 Audi A4, front; fits 2000-2001 Audi A4 Quattro, front; fits 2000-2001 Audi S4, front. Confirm the front axle left or right position, connector style, and cable routing before installation. The sensor uses a 2-pole connection and a 960 mm lead, so matching the original harness path is important for a clean install. For best results, inspect the tone ring, connector, and surrounding wiring before replacing the sensor.

Quality Assurance

HELLA is a recognized automotive parts brand with a strong reputation in braking and electrical components. This ABS wheel speed sensor is built with durable materials for dependable service in demanding road conditions.