In the early 1990s, many Nissan vehicles had a keyless entry system installed that used a 4-button remote transmitter with FCC ID A269ZUA073 on the back. This remote was used with keyless entry systems on 1990-1996 Nissan 300ZX cars.
The OE keyfob for this application is a very expensive part. Remotes Unlimited offers a ReMoto brand aftermarket replacement remote control that is on sale now for nearly $100 less than dealer list price on the Nissan version.
See both remotes at this link.
Keyless entry systems that use this remote are user programmable.