tr Volvo S80 ECU T-6 Up for sale is a Working, in excellent condition 01-02 Volvo S80 Engine Computer Bosch Part number-- 0 261 207 227 , This unit sold As-is. As always with this type of component your best bet is to match the part number to the one on your original ECU. A faulty ECU is one of the most common no start or random stalling problems with these cars. These can also cause issues with erroneous check engine lights as well as emission control & cold or hot start problems. This unit has an immobilizer function, and before it will start in your car, you may need to take this unit & your car to a volvo dealer or volvo specialist in order for the immobilizer to be programed. Once this is programed this will work in your car. Please do not purchase this unit thinking it will just "plug in and work" this must be done before it will. We will not accept returns on this item for "it didn't work or it didn't fit." Check your part number, confirm with your dealer you can unlock the immo function.If your car does not have these issues but you intend to keep it a while, I recommend our customers keep an extra ECU in the trunk. These units now have to be special ordered from most dealers new for big $$ (often times over $1000!), and you can never find one when you need one. Even now finding a good one second hand is getting to be quite difficult as these cars get older.