99 Nissan Infinity G20 ECU Up for sale is a Working, in excellent condition 1999 Infinity G20 Engine fuel / engine control module, this should be for Auto trans cars, but it may also work with MT cars. See the top or large photo. This may also work with Nissan Sentra SE-R models near this range. As always your best bet is to match the part number to the one on your original ECU. These units have been NLA for quite a while now, and are not at all easy to find, at any price much less as fair as this. These are usually fairly reliable, however can easily be damaged by wiring faults or voltage spikes (caused by a faulty alternator). A faulty ECU can cause problems ranging from a bad idle control circuit to random no injector pulse signal (causes no start or random cut outs) & many others.