Up for sale is a Working, in excellent condition Jaguar V12 ECU. This from a 90 XJS ECU is a DAC6337 Original, used unit. This car recently died due to a light amount of damage to the right front suspension & driver door. The insurance company totaled it because if this. The ECU still works great! It is a lucas unit, These cost well over $1000 from Jaguar, so this is in incredible bargain! Jaguar Part numbers listed at top . As always your best bet is to match up the part numbers on the ecu you need to replace with the numbers on this one. These are located in the trunk on the right hand side. This unit offers a 30 day functionality warranty. A faulty ECU is one of the most common no start or random stalling & low power problems with these cars. These can also cause issues with erroneous check engine lights as well as emission control malfunctions & cold or hot start problems. If your car does not have these issues but you intend to keep it a while, At this price, I recommend our customers keep an extra ECU in the trunk, before it becomes a potential breakdown "I need it now" situation.