Electricity

The electricity section holds the nervous system of a modern car: the ECU, comfort module, sensors, relays, wiring, keys with immobilizers and EV charging accessories. Most of these parts are sold used, from dismantled cars - and this is exactly where searching by model alone fails most often.

The exact part number beats the model

In electronics, two cars of the same model can carry different units - they vary by year, engine, trim and software version. So before buying:

• Compare the factory part number with your old unit - even one digit should not differ unless a specialist says otherwise
• Confirm the donor's engine and production year, the model alone is not enough
• Inspect the connectors in photos - corrosion and moisture traces are electronics' main enemy
• Ask the seller whether the part was removed from a working donor

Coded units and keys

One group of parts is digitally married to the car: the engine ECU, immobilizer and keys often work as a set and need reprogramming when moved to another car. This is a routine procedure - programming services handle the coding. Relays and most sensors need no coding and swap directly.

When the part is not the culprit

Electrical faults often sit not in the part but in a contact, a damaged wire or a corroded ground point. Before replacing a unit or sensor it pays to trace the actual break - otherwise the new part will show the same error. Fault-finding and repair are offered by electrics repair services.