Where is the forward collision warning sensor located?
They’re typically in the front of the vehicle—either a radar sensor in or behind the bumper/grille or a forward-facing camera behind the windshield; many systems use both and rely on sensor fusion to issue warnings.
Typical FCW sensor locations
While exact placement varies by make and model, there are a few common configurations across modern cars:
Camera-based FCW versus radar-based FCW
Cameras are usually mounted behind the windshield, near the rearview mirror, and read the road ahead for obstacles, traffic, and lane information. Radar sensors live in the front bumper or grille area and detect objects by radio waves. Many vehicles use a fusion of both to improve reliability, especially in poor weather or lighting conditions.
- Radar sensor in the front bumper or grille area, often paired with adaptive cruise control equipment.
- Forward-facing camera mounted behind the windshield, near the top center (behind the rearview mirror).
- Sensor fusion module that combines radar and camera data to issue warnings.
- In some premium or specialized systems, a lidar sensor placed in the front of the vehicle (less common in mainstream cars).
Note that exact locations can vary. The same FCW function may be delivered by different hardware depending on the brand and model, and some vehicles rely more on vision, others on radar, or a combo of both.
How to verify the location on your vehicle
To confirm the FCW sensor location for your specific car, use these steps:
- Check the owner's manual or the manufacturer's official website for specifications about FCW or ADAS sensor locations.
- Inspect the exterior front end for a bumper or grille-mounted module (radar) and inspect the windshield area for a camera behind the rearview mirror (camera-based systems).
- Consult a dealer or service technician if you’re unsure, especially if your vehicle uses multiple sensors or a fusion system.
- Where possible, refer to service documentation or vehicle diagnostic menus listing ADAS components to confirm sensor locations.
Knowing the exact placement helps with maintenance and ensures proper operation after repairs or windshield replacement.
Why sensor placement can affect performance
Radar tends to be robust in weather and lighting variations, while cameras can fail in glare, dirt, or heavy rain. Fusion systems use both to compensate for a single-sensor weakness, providing more reliable FCW warnings.
Summary
In short, forward collision warning sensors are usually placed at the front of the vehicle—radar modules tucked in the bumper or grille and/or a camera mounted behind the windshield near the rearview mirror. The precise layout depends on the model, and many cars use a sensor fusion approach that combines data from multiple sensors to provide timely warnings. For exact placement, consult your owner's manual or ask your dealer.
