Amber light
Blind Spot Monitor Warning
The blind spot monitoring system is switched off, blocked or faulty, or it is warning of a vehicle beside you.
Normal risk
Use your mirrors and look over your shoulder; the system is only an aid.
Short answer · Why is the blind spot warning light on in the dashboard?
A light in the mirror usually means a vehicle is in your blind spot. A light or message in the dashboard usually means the system is off or blocked, often by dirt, snow or a bike rack near the rear bumper sensors.
What to do
- Check the mirrorsA light in the door mirror means a vehicle is beside you.
- Clean the rear bumperThe sensors usually sit behind the rear bumper corners.
- Remove accessoriesBike racks or tow bars can block the sensors.
How is the light behaving?
| What you see | What it usually means | What to do |
|---|---|---|
| Steady | System off or blocked | Clean the bumper and check settings |
| Flashing | Vehicle in blind spot while indicating | Do not change lanes |
Possible causes
- Dirt or snow on the bumperBlocks the radar sensors.
- Bike rack or trailerCovers the sensors; some cars switch the system off.
- Sensor faultAfter a rear knock or repair.
Don't confuse it with
Questions about Blind Spot Monitor Warning
Does the system work with a trailer?
Some cars adapt it for trailers; others switch it off. See the handbook.