REBUILT AND TESTED WITH 60 DAY WARRANTY This is a PCM, Powertrain Control module from a 1999 Nissan Maxima. Completely tested, and guaranteed to work. No damage to board, components, or connector. Rebuilt using the highest quality components. We here at Pro-Rebuild take great care when rebuilding these to make sure you fix your vehicle right the very first time. This item will require on-car programming, coding or flashing during installation in order to work with your vehicle. Please confirm that you or your repair facility can perform this procedure before making your purchase. If your idle air control valve has failed, it will need to be replaced prior to the installation of this replacement ECU. Failure to replace a bad IAC valve will immediately damage the replacement ECU. Fits 1999 Infiniti I30 and Nissan Maxima with automatic transmission, with part number A18-N05 Z85 ONLY. The last four characters on the part label do NOT need to match. !!!!FREE PRIORITY DOMESTIC SHIPPING!!!!Faster shipping available! This part carries a 60-DAY WARRANTY! If within this 60 day period, the part fails, feel free to return it for a refund or replacement. International customers: We ship to most countries. Shipping costs are automatically figured during the checkout process. FEEL FREE TO CONTACT Pro-Rebuild Monday through Friday 9-5 CST