Fitting is only half the job. A used module is also checked before it is coded, so a stolen part is not written to the car. A basic scan or a service reset is cheaper, and that is on diagnostics.
Tow bar
A new bar can be bolted on and still be wrong. The car keeps beeping, the trailer lights do not flash, and the parking sensors stay on while you tow. £149 tells the car a bar is fitted. £249 if that car must also register the bar with the manufacturer. The bar itself is not included.
Headlight module
A replacement lamp often lights up and still leaves a fault, or the cornering and daytime running lights never switch on. The car does not know the new unit is there. £179 codes the module that is already fitted. A second-hand lamp is £219, because that price includes a stolen check. The lamp is not included.
Cruise, camera, alarm
The stalk, camera or alarm can be fitted and do nothing, because the car still thinks they are not there. Cruise control is £149. A rear camera is £179. A parking sensor module is £179. An alarm is £179. If that part is second-hand, add £40. The stolen check is included in the higher price. The hardware has to be on the car first.
Instrument cluster
A second-hand cluster fitted on its own usually will not start the car, or it shows the wrong warnings. £219 codes it so the car accepts it, and that price includes a check that the cluster is not recorded as stolen. If it is, it is not coded. Mileage is only written where a genuine replacement requires it. We do not change a mileage to hide distance.
Body module
After a body module swap the doors may not lock, the windows stay dead and the lights misbehave, even though the unit is plugged in. A new BCM or BSI is £199. A software update on the module already in the car is £179. A second-hand body module is £239, stolen check included. This is not a remap.
Radio and gateway
A replacement radio can power on with no Bluetooth, no steering controls and a component-protection fault. A gateway swap can stop modules talking to each other. A new radio or gateway is £179. A second-hand one is £219, because that price includes a stolen check before it is coded.
Battery, injectors, steering angle
A new battery that is not coded leaves stop-start off and a battery warning, because the car still charges for the old one. New injectors that are not coded run roughly and log faults. After an alignment, an unadapted steering angle sensor leaves the stability light on. Battery £129. Injectors £149. Steering angle £129. These are not used-part checks.
Component protection
A used module from another car is often rejected. It is fitted, it has power, and the car still will not use it. £339 checks it is not recorded as stolen, then clears the protection so it can be coded to this car. It costs more than a tow bar or a battery code because the session itself costs more.
Crash data reset
After a repaired impact the airbag light can stay on because the module still stores the crash. £179 clears that data once the damaged parts have been repaired or replaced. It is not used to hide an accident that has not been repaired. This is the car's own module, so there is no stolen-part check.
Stolen, or not offered
If a second-hand part is recorded as stolen, it is not coded to the car. The charge for that check is £49, not the full job. Needle sweep is not offered. A camera or radar calibration that needs a target is on the ADAS page. If that car cannot have the job, it is refused. It is not given another price.