Engine ECU removed from a 2009 Vauxhall Insignia. In good working used condition, the part number for this unit is 55579906 ident AAP9. This will need to match the number on the back of the ECU you are replacing. This ECU is reset. You will need to have a qualified technician with Bosch Tech 2 software removed your faulty unit and re install the new ECU in order for it to work. They MUST be programmed to the car correctly with Tech 2 otherwise this will not work. Please do not try and install yourself. To fit all Vauxhall Insignia MK1 2008-2017 models with a 2.0 A20DTJ engine fitted and the correct part numbers as mentioned above. Price includes delivery via Royal Mail Special Delivery. ***Please note this listing is a bulk listing and the ECU imaged is purely for illustration purposes.***