Hi,

I have a mk5 golf 2.0 FSi with an ECU that has failed, symptoms are no ECU light or communication. When Battery is taken off there is a brief ECU connection on diagnostics before failing again. Car cranks with no spark when i went to remove the ECU I found it had been replaced in the past with the ECU having MK6 Golf written on it. So i don't have access to the original codes. What do i need to swap in another ECU and get it running again.

I have found some kits on ebay that include ECU/Clocks and Key, do i need this or are there any unlocked ECU that would be plug an play. Just looking for the cheapest way to get it going as its being used as a track car