Standard Ignition ALS540 ABS Wheel Speed Sensor - Rear Left or Rear Right

Reliable ABS Wheel Speed Sensor for Audi A4 and S4 Models

The Standard Ignition ALS540 ABS Wheel Speed Sensor is designed to provide accurate wheel speed data for Audi A4, A4 Quattro, and S4 vehicles. This sensor helps maintain proper ABS function and vehicle stability by delivering precise input to the braking system.

• Compatible with Audi A4, A4 Quattro, and S4 models
• Part number ALS540 for easy identification
• Engineered to meet OEM specifications for reliable performance
• Durable construction to withstand harsh driving conditions
• Direct replacement sensor for ABS wheel speed monitoring

Product Details and Compatibility

The Standard Ignition ALS540 ABS Wheel Speed Sensor is specifically designed for use in Audi vehicles including the A4, A4 Quattro, and S4 models. This sensor monitors the rotational speed of the wheels and sends this data to the vehicle’s ABS control module. Accurate wheel speed information is critical for the anti-lock braking system to function correctly, helping to prevent wheel lockup during braking and maintaining vehicle control. The ALS540 sensor is manufactured to meet or exceed original equipment standards, ensuring a precise fit and reliable operation.

Common Applications and Problem Resolution

• Restores proper ABS warning light function
• Eliminates erratic ABS or traction control behavior
• Prevents false ABS activation during braking
• Improves vehicle stability and braking response
• Resolves wheel speed sensor fault codes related to Audi A4 and S4 models

Installation Notes and Tips

Installation of the Standard Ignition ALS540 sensor requires basic mechanical skills and proper tools. Before installation, ensure the vehicle is safely lifted and supported. Remove the old sensor carefully to avoid damage to the mounting area or wiring harness. Clean the sensor mounting surface to ensure accurate readings. After installation, verify sensor operation by checking for ABS warning lights and performing a test drive. Consult the vehicle’s service manual for torque specifications and detailed procedures.

Quality Assurance and Warranty Information

Standard Ignition parts are manufactured to meet strict quality standards and undergo rigorous testing to ensure durability and performance. The ALS540 ABS Wheel Speed Sensor is backed by a limited warranty against defects in material and workmanship. This warranty provides confidence in the sensor’s reliability when installed in compatible Audi A4, A4 Quattro, and S4 vehicles.