Genuine Hyundai original equipment Siemens ECU Up for sale is a Working, in excellent condition 2004 Hyundai Santa Fe : Engine ComputerECU), (L dash), FED & Ca- 3910937509 Engine Electronic control unit computer ECU. This unit is from a 2004 with the 2.7 liter V6 engine, May fit others too.This comes with a 30 day functionality guarantee. In the unlikely event that it fails to function properly in the 30 days after you receive it, you can return it to us and we will send you a free replacement or refund.Check the part number on your original to be sure this is correct for your car. The part number must match for it to work correctly. This is one of the most common no start, random stalling, or low power output problems with these Motronic ECU controled cars.. If yours does not have this problem, keep an extra ECU in the trunk, you might some day be glad you did... These units now have to be special ordered from most dealers new for big $$ (often times over $1000!), and finding a good one second hand is getting to be a very hard chore.