There are many ways to specify a replacement remote. Remotes Unlimited’s website, for example, has 5 ways to search. In our call center, though, we typically start with the FCC ID. Many key fobs show the FCC ID on the back of the case and it is a good way to distinguish factory keyless entry remotes from aftermarket alarm system fobs.
Even using the FCC ID can present a challenge though. One FCC ID, L2MAL41T, was used on more than a dozen different remotes. The remotes have a variety of brands, including Omega, Excalibur, K9, M.A.T., and Crimeguard. In addition to looking different, many of these remotes are not interchangeable. Also, many of the original parts have been discontinued; some of these have compatible substitute parts and some do not.
For remotes with an FCC ID of L2MAL41T shown on the back, RUI uses the manufacturer part number to differentiate for replacement specification purposes. (See part number search for remotes with FCC ID L2MAL41T at this link.) These part numbers also appear on the back of the case, and are usually preceded by “R&D #” or “Omega”. So, if you have a remote with an FCC ID of L2MAL41T, be sure you also know the manufacturer part number before buying a replacement.