i never heard part of nissan's standard features included a tracking device
i strongly believe there are no secret tracking devices planted in nissan's by nissan , unless its a navi system or low-jack .
there are other ways to track someone , like your cell phone , as long as its on , even if its not being used , the phone company has a record of every where that phone goes . toll records and toll booth photo's . red light camera's and speed camera's . public transportation camera's (for watching traffic) .
p.s. good luck !!!