I've looked at the package but there is no specific information with model numbers. It just says "Compatible only with Garmin units that support NT maps". My Garmin is a 250 purchased Nov 2008.
I suspect that if your unit has a slot for a micro SD card that it is compatible but I know it's a big outlay for just a guess.
I wish that I could give you an answer but I just do not know, the only way that I can help is to give you the telephone number of their customer services which is 02380662899 hope that this will help. Arthur.
We used it on the Nuvi 1490 and it worked fine. We have had no problems with using other country SD cards e.g. one called Tracks4Africa. We switch back to the European map when we get back from travelling (always a kerfuffle with this as we forget how to do it but have bookmarked the instructions now!)