OE Quality
60-Day Returns

Standard Ignition ALS439 ABS Wheel Speed Sensor - Rear
Reliable ABS Wheel Speed Sensor for BMW X5
The Standard Ignition ALS439 ABS Wheel Speed Sensor is designed specifically for BMW X5 models, providing accurate wheel speed data essential for your vehicle's anti-lock braking system. This sensor helps maintain vehicle stability and control by monitoring wheel rotation speed.
Key Features of Standard Ignition ALS439 ABS Sensor
- Compatible with BMW X5 models for precise fitment
- Monitors wheel speed to support ABS functionality
- Durable construction for consistent performance
- OEM-quality replacement part number ALS439
- Ensures reliable communication with vehicle’s braking system
Detailed Product Description
The Standard Ignition ALS439 ABS Wheel Speed Sensor is engineered to meet the exact specifications required by BMW X5 vehicles. This sensor plays a critical role in the anti-lock braking system by detecting the rotational speed of the wheels and sending this information to the vehicle’s electronic control unit. Accurate wheel speed data allows the ABS to prevent wheel lockup during braking, enhancing safety and control. The ALS439 sensor is manufactured to provide consistent signal output and withstand the harsh conditions encountered in automotive environments.
Common Issues Addressed by the ALS439 Sensor
- Intermittent or no ABS warning light due to faulty sensor signals
- ABS system malfunction or failure to engage properly
- Unstable braking performance or wheel lockup during stops
- Traction control or stability control system errors related to wheel speed data
- Irregular speedometer readings caused by sensor failure
Installation Notes and Tips
When installing the Standard Ignition ALS439 sensor on a BMW X5, ensure the sensor mounting area is clean and free of debris. Handle the sensor carefully to avoid damage to the wiring or connector. Verify proper alignment and secure mounting to maintain accurate wheel speed readings. It is recommended to check the ABS system for error codes after installation to confirm sensor functionality.
Quality Assurance and Warranty
Standard Ignition parts are manufactured to meet or exceed OEM standards, ensuring reliable performance and durability. While specific warranty details for the ALS439 sensor may vary, Standard Ignition typically offers coverage against defects in materials and workmanship. Refer to the product documentation or manufacturer for exact warranty terms.
This part fits 3 vehicles. Search below:
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 2006 | BMW | X5 | Rear | |
| 2005 | BMW | X5 | Rear | |
| 2004 | BMW | X5 | Rear |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.