وحدة تحكم مانع الحركة معيبة

The security module that decides whether the car is allowed to start — reading the key or fob, checking it against what the vehicle expects, and authorising the engine and, on push-button cars, the release of the steering column lock.

Its failures strand the vehicle where it is parked, which is what separates it from most electrical faults: not a warning light to book in about, but a car that will not crank in a car park.

Suspect the cheap things first. A weak fob battery, a second key that works when the first does not, and a receiver antenna disturbed by trim work all present identically and cost far less. Suspect the module last, because replacing one means re-marrying it to the vehicle's keys and engine controller — a coding job, not a plug-in swap, and one that strands the car again if it goes wrong.