YOU WILL NEED TO HAVE IT PROGRAMMED BY SHOP WITH ob2d programming software (Launch X431 we recommend). Your VIN# must be added to it along with linking your car key immobilizer or IT WILL NOT WORK! The immobilizer and VIN# have to be added to the ECM or car will run for seconds and turn off. YOU DO NOT need new keys etc – this is not true. Up for sale is a FACTORY OEM ECM/PCM – not a mile on it. Only fits what is listed below. No miles on it! 2003 Altima 2.5L – MANUAL Transmission – with Cruise Control. The number on your old one must match. IF we made a mistake, we will do all we can to make it right. We want to earn your business and your feedback. PLEASE be aware of this! The item “NEW OEM ECM PCM ENGINE CONTROL MODULE M/T 2003 […]