Coding is required to tell the vehicles ECU that a towbar is present so the towing electrics will function properly. This is done with a diagnostic tool, and may need to be done by the main dealers.

Bumper cuts are cut on the underside of the bumper.

None visible : the cut will not be visible unless you look up at the bumper from the ground.

Visible: the cut will be visible when standing behind the vehicle.

No cut: No cutting required.

Many modern vehicles require a bypass relay for the towbar electrics to work correctly.
If your vehicle requires this relay then damage can occur to the cars electrics if one isn't fitted.

Our data is collected from the tow bar and tow bar wiring manufacturers with regards to whether your vehicle needs a bypass relay.