I dont know anyone with an XTerra that doesnt have pulsing brakes. Mine have done it for quite some time.
Dealers are so full of BS - I just spent some time putting screws back underneath my engine that they "forgot" to put back. Skid plate as hanging by one screw! They just want it to break so they get to hit you for pricey repair bills.
I gotta say Ive had the crappiest time with Nissan dealers/Service than any other brand of vehicle Ive owned.