ECU Programming, Replacement & Cloning

The engine control unit (ECU) runs the engine and talks to almost every other module in the car. When it fails, the car may not start, may run in limp mode or may stop communicating with the diagnostic tool altogether. Replacing it is only half the job: the new unit has to be programmed or cloned so it matches the vehicle.

Signs of an ECU problem

• No start, or cranks but will not fire, with no fault in the fuel or ignition system
• No communication with the ECU on a diagnostic scan
• Limp mode or multiple warning lights that come and go
• Water damage, corrosion or crash damage to the unit or its wiring

We diagnose the fault first, because wiring, power and earth faults can look exactly like a failed ECU.

Programming a replacement ECU

A new ECU is programmed online with genuine manufacturer software: the VIN, the vehicle's variant coding, immobiliser matching and any adaptations the manufacturer requires.

Cloning an ECU

Cloning copies the software, coding and security data from the original ECU onto a replacement unit, on the bench or online. The replacement then works just like the original, with the immobiliser data already in place. It is often the quickest and most affordable fix when the original unit is damaged but can still be read.

Used and second-hand ECUs

A second-hand ECU can often be made to work by cloning or reprogramming it. Send us the part numbers of both units and we will tell you whether it is possible before you buy anything.

Mail-in for selected units

Selected modules can be posted to us from anywhere in Australia for cloning or programming on the bench. Not every module can be done this way, so send us the part number and we will confirm before you post anything.

Working on a Mercedes-Benz? See our Mercedes-Benz XENTRY online coding and programming service.

See every module we handle on our module programming and coding page.