Had a 1998 Ford Ranger and put five transmissions in it. The dealer never gave me any headache and even provided a loaner. Nissan hasn't fixed my transmission yet, ripped off my parents such that they were in litigation, lied to me about service done, and more. From what I have seen is this:

Buy an American vehicle and maybe have issues but the dealer will help you and...

Buy foreign made, have trouble and hope all works out.

Through all this 1-800-Nissan1 is a freaking joke staffed by morons. Luckily I have an extended warranty so the big expensive parts are covered. I expect to hear much more in response!!!!

Tim

PS- IF you know of a good service department let me know, please!!!