Buick Lacrosse ABS Wheel Speed Sensor in US

Your Buick Lacrosse ABS wheel speed sensor is the component that makes anti-lock braking possible on your Lacrosse. It monitors the rotational speed of each wheel in real time and sends that data to the Buick Lacrosse ABS control module, which uses it to prevent wheel lockup during emergency stops. When a sensor fails on your Lacrosse, your ABS loses the input it needs. On wet, icy, or gravel road surfaces, the difference between a controlled stop and a skid can come down to whether your Buick Lacrosse wheel speed data is reaching the module.

What Is the ABS Wheel Speed Sensor on Your Buick Lacrosse

The ABS wheel speed sensor on the Buick Lacrosse is an electromagnetic or Hall-effect sensor mounted near each wheel hub or bearing assembly of your Lacrosse. It generates an electronic signal as a toothed reluctor ring rotates past it, producing a frequency the Lacrosse ABS module interprets as wheel speed. On most modern Buick Lacrosse vehicles, this same data feeds the traction control system, electronic stability control, and electronic brake force distribution, making a functioning wheel speed sensor critical to the safe operation of multiple Lacrosse systems simultaneously.

Signs of a Failing ABS Wheel Speed Sensor on the Buick Lacrosse

• ABS warning light on your Buick Lacrosse dashboard, the most common first indicator of a failing sensor
• Traction control or stability control warning light illuminated alongside the Lacrosse ABS light
• ABS activating on your Buick Lacrosse during normal stops at low speed where it should not engage
• Complete ABS deactivation on the Lacrosse, wheels lock under hard braking on wet or icy roads
• Speedometer on your Buick Lacrosse reading erratically or dropping to zero at speed
• Fault codes in the C0035 to C0050 range stored in the Buick Lacrosse ABS control module

Passive vs. Active ABS Sensors for the Buick Lacrosse

GeoBrakes stocks both passive and active ABS wheel speed sensors for the Buick Lacrosse. Passive sensors use an analog signal and are found on older Lacrosse vehicles and many trucks still in service. Active Hall-effect sensors require a small power supply and output a clean digital signal, offering greater accuracy at very low speeds. Active sensors are standard on most Buick Lacrosse vehicles manufactured after the mid-2000s and are required for full compatibility with modern Lacrosse traction and stability control systems.

Why GeoBrakes for the Buick Lacrosse ABS Wheel Speed Sensor

Signal accuracy matters as much as fitment with Buick Lacrosse wheel speed sensors. A sensor that generates the correct frequency for your Lacrosse ABS module ensures consistent ABS calibration, proper traction control thresholds, and accurate stability control response on your Buick Lacrosse. Every sensor in the GeoBrakes catalogue is matched to the Buick Lacrosse through our vehicle selector, with front and rear positions listed separately to eliminate position errors on your Lacrosse.

Frequently Asked Questions - Buick Lacrosse ABS Wheel Speed Sensor

Can I drive my Buick Lacrosse with a faulty ABS wheel speed sensor?

You can drive the Buick Lacrosse with a failed ABS sensor, but the anti-lock braking system on your Lacrosse will be completely disabled. On icy or wet American roads, this significantly increases stopping distances and the risk of losing steering control during hard braking on your Buick Lacrosse. Replacing a failed sensor promptly is strongly recommended, particularly before winter.

How do I find the right ABS sensor for my Buick Lacrosse?

Use the GeoBrakes vehicle selector and enter the Buick Lacrosse year, make, and model. The system displays only the sensors confirmed to fit the Buick Lacrosse, with front and rear positions listed separately. Select the position matching the sensor you are replacing on your Lacrosse to avoid receiving the wrong unit.

Do I need to replace all four ABS sensors on my Buick Lacrosse at the same time?

No. ABS wheel speed sensors on the Buick Lacrosse are independent components and only the failed unit needs to be replaced. However, if your Lacrosse has high mileage and one sensor has failed, it is worth visually inspecting the connectors on the other Buick Lacrosse sensors for corrosion while the wheel is removed.