It is VERY important that you call us before any work is completed on your vehicle. States require detailed information about the shop doing the work. This documentation assures the unit will not record a tampering event if the power to the vehicle is interrupted as the unit will record the power disconnect and the reconnect. We can also provide your service provider with an override code so that they can test drive the car and turn it on and off during the repair process without having to use the interlock.