ADAS Calibration After Bumper Repair: What to Do Next
Had a bumper repair, and been told your car needs ADAS calibration? The body shop is right, and it isn't an upsell. The sensors that run automatic emergency braking and lane assist sit behind the bumper, and moving the bumper moves them. Here's why it's needed, what it costs, and whether your insurer should pay.
If the body shop said you need this, they're right
ADAS calibration after bumper work isn't an upsell. The radar and cameras that run automatic emergency braking, adaptive cruise and lane assist sit behind the bumper and grille. Take the bumper off to repair a scuff, or knock it hard enough to shift it, and those sensors no longer point where the car expects. They have to be recalibrated to read the road safely again.
Why a bumper repair throws ADAS out
Modern cars carry a forward radar low behind the front grille or bumper, and a camera at the top of the windscreen. Those sensors are aimed to a fine tolerance, a fraction of a degree. Automatic emergency braking, adaptive cruise and lane assist trust that aim completely.
Take the bumper off to repair it, or knock it hard enough to move it, and the aim shifts. The car can't tell the sensor is now pointing slightly wrong. It either switches the system off and shows a warning, or keeps running on bad data. Recalibration resets the sensors to the manufacturer's reference. It's a separate job from the bodywork, and most body shops don't carry the equipment for it.
Which warning has come up?
A bumper repair disturbs different sensors depending on what was done. If a specific warning is showing, go straight to its guide.
- SymptomsRead more
ACC deactivated
Adaptive cruise greyed out or showing unavailable.
- SymptomsRead more
Front Assist not available
The automatic emergency braking warning.
- SymptomsRead more
Forward collision warning fault
The collision warning system flagging a fault.
- SymptomsRead more
Lane assist fault
Lane keep or lane departure not working.
Before you book, a two-minute check
- 1
Check nothing was left unplugged
Ask the body shop, or look yourself, whether every sensor connector behind the bumper went back on. A radar or camera left unplugged shows the same warning as a misaligned one, and that's a five-minute fix, not a calibration.
- 2
Check the bumper is seated properly
Run your hand along the bumper line. Uneven gaps or a popped clip mean the bumper, and the radar behind it, isn't sitting where it should. Worth raising with the body shop before anything else.
- 3
Clean off masking residue or overspray
Repair work leaves tape residue, polish and light overspray. Over the radar or the camera that alone can block it. Wipe the badge area and the inside of the windscreen by the mirror.
- 4
Note which warnings are showing
Write down the exact dashboard messages. They tell you, and us, which sensors were affected, and they point you to the right guide above.
How we fix it
If the checks above don't explain it, the sensors need recalibrating. A technician realigns the radar and camera to the manufacturer's reference, clears any stored fault, and confirms the safety systems are working before you leave.
It's a fixed-fee job and ends with a calibration certificate. That certificate matters here: if the bumper repair is part of an insurance claim, it's the document that proves the ADAS work was done to spec. The full procedure is in our ADAS calibration guide.
Frequently asked questions
They're right. Any repair that takes the front bumper off, or a knock strong enough to move it, shifts the radar and cameras behind it out of alignment. The safety systems can't work properly until they're recalibrated. A good body shop flags it precisely because they know they can't do that step themselves. It's the opposite of an upsell, they're sending the work elsewhere.
Usually, yes, when the bumper repair is part of a claim. ADAS calibration is a recognised part of putting a car back to its pre-accident condition, and insurers expect it on any modern car. If someone else hit you, it belongs on the at-fault claim alongside the bodywork. Keep the calibration certificate, it's the proof an insurer will want to see.
ADAS calibration needs dedicated target equipment, a level calibration bay and manufacturer software, a separate setup from bodywork tools. Most body shops, even good ones, don't have it. Access can be the issue too: on some Nissans the front sensor sits behind the badge and can only be reached once the badge is off, which catches fast-fit garages out. Our Nissan bumper-repair guide covers that. The equipment and the access are the gap our accredited network fills.
Radar and camera calibration is a fixed £349 across our network, the same price wherever you are in the UK. It covers the diagnostic scan, the calibration, and the certificate. If the scan shows a sensor was damaged in the original impact and needs replacing, you'll know that cost before any work goes ahead.
Quite possibly, yes. A sensor can be knocked out of alignment without the car flagging a fault, the forward camera especially. It carries on running, just on slightly wrong data, which is the worst case for a safety system. If the bumper was removed or took a real knock, a calibration check confirms the sensors are still reading true, warning light or not.
The calibration itself takes about 60 to 90 minutes in the workshop. It's a same-visit job, you don't leave the car overnight. Booking lead time depends on workshop availability near you, which we confirm once your enquiry is routed.
Book your post-repair calibration
Tell us your registration and what the body shop did. We come back with the price, the nearest accredited workshop, the soonest slot, and the certificate for your claim.