Calibration research tips: Blind spot indicator in side mirrors

When searching for information on advanced driver assistance systems (ADAS) through an original equipment manufacturer (OEM) repair information site, unique calibration procedures or requirements may appear. These procedures can vary by year and model, even within the same vehicle make. 

Understanding these variations is essential when performing repairs and calibrations. One common topic of discussion involves side mirrors equipped with blind spot indicator lights. 

A frequent question is whether the blind spot detection system requires calibration if a side mirror is removed, reinstalled, or replaced due to the presence of the indicator light. In most cases, the answer is no. 

Most blind spot detection systems rely on radar sensors mounted behind the rear bumper cover—on either side—or on the quarter panels behind the rear bumper cover. These radar sensors detect vehicles traveling within the blind spot zone at the rear of the vehicle. 

The side mirrors themselves do not contain the radar sensors that enable the system to function. Instead, the indicator lights in the mirrors serve as outputs. They display alerts based on information received from the radar sensors located at the rear of the vehicle, notifying the driver when another vehicle is in the blind spot. 

As with all ADAS-related repairs and calibrations, OEM procedures should always be followed. Accessing and applying the correct information efficiently helps ensure a complete, safe, and high-quality repair. To learn more about calibration, consult the I-CAR Canada course catalogue.