yes, they appear to be, I've run into a few places that list 96-97 different from 98-02, but found that THEY were wrong ( I bought a pair of air bags for my '97 from E Trailer, turns out THEIR listing is wrong, the bags were actually for a Discovery, but THEIR engineers refused to admit and I got hosed on the deal. They work, took some massaging, but they've been in there of about 4 years now and still hold air and support the load of the camper.
Trailer hitches should all be the same, be aware, Toyota does not recommend using a weight distribution set up on the 3rd gen Runners ( its in the owners manual )