A hidden immobiliser is only as good as the person who fits it

A CAN bus immobiliser communicates directly with the network that runs a modern car’s electronics. Done correctly, that connection is non-invasive and reversible. Done incorrectly, it can create warning lights, communication errors, or a starting fault that is hard to trace back to its actual cause.

This is why manufacturers of these devices generally require professional fitting, and why the fitter’s experience with your specific make and model is a real factor, not just paperwork. Vehicle-specific installation guides exist because the same principle applies differently from one car to the next.

A properly fitted immobiliser also stays reversible: it can typically be removed, or reprogrammed for a different vehicle, without leaving a permanent mark on the car’s original wiring.

A typical fitting starts with identifying the correct connection points for that specific vehicle, then wiring the module in, usually a handful of connections for a system like CAN-IMMO, rather than cutting or splicing the car’s original loom. The technician then programs the device for that vehicle and, where the system supports it, pairs it with the smartphone app or TAG.

Before handing the car back, a good installer walks you through how to actually use the system day to day, what to do if something does not respond as expected, and how to put it into service or valet mode if the car is going in for other work.