tr Volvo 960 I6 ECU Up for sale is a Working, in excellent condition Volvo I6 B63 white block OBD2 ECU. Bosch Part number-- 0 261 203 654 (0261203654) , Volvo part number-- 1739 1193 . (17391193) This unit offers a 30 day functionality warranty. This should fit many OBD2 960 / V90 models, & 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. 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.