Toyota has been the largest user of dealer-installed keyless entry systems over the past twenty-five years. Many Toyota vehicles were imported into North America (or built here) with no factory keyless entry system installed. The importer or dealerships then added a port-installed or dealer-installed system to suit the preferences of US and Canadian consumers.
From 1990 through 2002, the most common Toyota dealer-installed keyless entry systems used remote transmitters with FCC ID BAB237131-022. There were two versions of these 2-button keyfobs that are nearly identical. One has a black case and black buttons. This is Remotes Unlimited part 162-1162. The other has a dark grey case and black buttons. This is Remotes Unlimited part 163-1163. The two remotes are not interchangeable.
Vehicles with model years of 1996 and earlier require part 162-1162. Vehicles with model years of 1999 and later that have a dealer-installed system using a remote with FCC BAB237131-022 almost certainly use part 163-1163. 1997 and 1998 model-year Toyotas with a dealer-installed system could have either system. For these, it is important to distinguish between the black-cased remote and the grey-cased keyfob.
Both of these remotes now have replacement remotes that look different than the old parts. All of the systems that use these parts are user programmable.