Citroen ADAS Calibration. From £162 Per System.

The radar that runs Adaptive Cruise Control on the C5 Aircross sits behind the lower grille area, and a knock to that part of the bumper can leave the car with an aim it can no longer verify. On its next self-check the car can't verify where the radar points, so it takes cruise offline instead of running it on readings it can't trust. The dash message is the system protecting itself, not a second fault.

Clearing the code changes nothing about the radar's aim, so the warning comes back. What fixes it is a static recalibration to Citroen's documented procedure, with the certificate recording the post-job aim readings. Front radar calibration is £162 inc VAT (£135 +VAT) at a centre.

Front camera calibration is £162 inc VAT (£135 +VAT), front radar is the same, with the full rate card on this page. Two or more systems in one visit: the highest-priced system is full price and each additional system is 35% off at a centre.

The dealer route prices the same calibration through a dealership labour rate: £300 to £900 in quotes customers have shown us, sometimes with its own inspection fee on top. Every rate we charge is published on this page before you enquire, and the work runs to Citroen's documented calibration procedure either way.

Not usually from the alignment itself. Setting the wheel geometry doesn't disturb the windscreen camera or the front radar, so a C3 that went in for routine tracking comes out with its driver aids untouched. What matters is why the alignment was needed. A kerb strike or a pothole hard enough to knock the tracking out can also upset the steering angle sensor, and lane keeping reads its inputs from there.

Measure before booking anything: a diagnostic scan is £54 inc VAT (£45 +VAT), always itemised as its own line, and it shows whether any sensor is actually sitting outside tolerance. Send your registration with a note on what happened before the alignment, and the written quote lists only what the readings say your car needs.

Yes. The ë-C4 carries the same driver-assistance hardware as the petrol and diesel C4: a forward camera at the top of the windscreen and, on cars with Highway Driver Assist, a front radar that handles the distance side while the camera reads the lane. Each is priced as its own system, so the quote covers what your car actually carries rather than a package.

Windscreen replacement is the usual ë-C4 trigger, because the camera was aimed through the original glass and a new screen sits differently enough to put that aim out. The windscreen walkthrough covers the job step by step. Front camera calibration is £162 inc VAT (£135 +VAT) at a centre.

No, and that's by design. A replacement radar arrives blank. It has to be coded before the car will recognise it, then calibrated so its aim satisfies Citroen's documented procedure. Until both steps have run, the unit can be mounted, plugged in and powered while Adaptive Cruise Control stays off, because the car holds no verified reference for where the new radar points.

The same goes for a second-hand radar, with one question to settle first: whether a used unit will accept coding to your car in the first place. The centre settles that in the written quote before you spend anything. At a centre, coding a replacement front radar to the car is £232.80 inc VAT (£194 +VAT), while the radar's calibration is quoted as its own line beside it, the cheaper of the two, so it's the one the multi-system discount comes off.

No. UK block exemption rules protect your right to have repair and maintenance work, calibration among it, carried out by an independent workshop with the manufacturer warranty intact, as long as it's done to Citroen's standard.

That's the condition the paperwork exists to prove. The job runs to Citroen's documented calibration procedure and the certificate sets the post-job readings against Citroen's tolerances. Certificate to manufacturer tolerances, the same standard dealers issue. Keep it with the service history; if a warranty question ever surfaces, the answer is already in writing.