Common on the Golf, Passat, and Tiguan after grille or bumper work, a windscreen replacement, or sometimes with no warning at all. Here's what triggers it on a VW, and what the calibration costs.
Yes, you can drive the car. Adaptive cruise control is disabled until the system clears, but normal braking, steering and conventional cruise still work. The risk is reduced collision avoidance, so leave more following distance until it's resolved.
Volkswagen mounts the ACC radar low in the front grille, right behind the VW badge. It's an exposed spot, so most cases trace back to something disturbing that area. Find the one that fits your car.
A refitted bumper, a new grille, or a parking knock can shift the radar a few millimetres off its aim. The system then reads the road wrong and shuts ACC down. This is the cause we see most often.
The radar sits directly behind the front VW badge. Fitting an aftermarket badge, gloss black ones especially, can knock the module or block its signal. If the warning started the day you changed the badge, that's almost certainly why.
VW's forward camera works alongside the radar and sits at the top of the screen. If the glass was replaced without a follow-up ADAS calibration, the camera and radar fall out of sync and ACC drops out.
On a salvage-category VW, the front-end rebuild often disturbs or disconnects the radar. Owners tell us the car drives fine but cruise control never came back after the repair.
A flat battery or a battery change can wipe the stored ADAS settings the radar depends on. Less common, but we do see it.
Plenty of owners get 'ACC deactivated' with no recent work at all. A soft fault, a sensor drifting over time, or a knock you never noticed. A diagnostic scan tells you exactly what's wrong.
C110300 means the radar can't complete its calibration. U023500 means the car has lost communication with the front distance sensor. Both point to a calibration job rather than a failed part.
Worth two minutes first: clear anything covering the radar behind the front VW badge, then do a full key-off restart. If 'ACC deactivated' is still showing, it's a radar calibration job.
The fix is a fixed £349 through our network, with the diagnostic scan and a calibration certificate included. There's no charge for the diagnostic if you decide not to go ahead. See how ADAS calibration works for the full procedure.
Pricing is fixed across our network. Same price wherever you are in the UK. Your tier is set by what work has been done, not by your postcode or your car's make.
All prices include the diagnostic scan, the calibration procedure (static, dynamic, or both as required), a post-calibration check, and a calibration certificate. No charge for diagnostic if you decide not to proceed.
Send your registration and a line on what's happened. We'll come back with the fixed price, the nearest accredited workshop, and the soonest available slot.
No. Standard ACC radar calibration on a Volkswagen doesn't have to go through a VW main dealer. Any workshop with the right calibration equipment and VW-specification procedures can do it, and that's what our accredited network is set up for. You're sometimes told it's dealer-only because a general garage can't calibrate ADAS, but a specialist workshop can. A main dealer will quote their own labour rate for the same job.
Yes. The forward radar on most Volkswagens sits directly behind the front VW badge. Removing the badge to fit an aftermarket one can knock the module or its alignment, and 'ACC deactivated' or 'Front Assist not available' often appears straight after. If the warning started when you changed the badge, that's almost certainly the cause, and a calibration puts it right.
Usually, yes. On salvage-category VWs the front-end repair often disturbed or disconnected the radar without anyone recalibrating it afterwards. If the radar module is still intact, a calibration brings ACC back. If the previous repair left the module damaged or missing, it needs replacing first. A diagnostic scan tells you which case you're in before any work is booked.
Radar calibration is a fixed £349 across our network, the same price wherever you are in the UK. That covers the diagnostic scan, the calibration, and a calibration certificate. If the scan shows the radar has failed and needs replacing rather than calibrating, you'll know the cost before any work goes ahead. There's no charge for the diagnostic if you choose not to proceed.
Same radar, same forward camera, a different warning on the dash. If your VW is flagging more than one of these, a single calibration visit usually clears them together.
Shares the ACC radar. It often flags at the same time as this fault.
Camera-based steering aid that drops out after a windscreen replacement.