I think most Sentras have same problem but Nissan wont admit. Had change belts on new 05 sentra at 8000 miles because they told me belts were glazed, 10k later squeaks are back, like birds That is not normal. Went back to Dealer and told me the same thing, that I need new belt, how can you need new belt every 10k miles???

As far as the crank sensor plug they are the same on those,altimas. and i think sentras too. i would take the old one or sensor with you and check other nissans,

did you replace it with new one, or used one?? also have you replaced your air filter and used NISSAN only air filter. something tells me that you had non nissan/aftermarket air filter installed and that is why your air flow meter failed. you need to use nissan air filter ONLY in your model nissan. sentras do not like non nissan air filter, because non nissan filters are not coated in small amount of oil and let foreign particals / dirt go pass the filter and that will fry your $500 air flow meter.

DOes it have 2 belts on it or just 1? Some Sentras have 1 or 2 belt systems.

The timing chain doesn't really have a maintenance period. They don't have a habit of breaking or stretching. Timing belts on some vehicles do have a recomended replacement period. Locate your local NTB, Firestone, or Sears for the maintenance schedule.

Timing belt should be changed at roughly 35000 to 45000 miles depending on how much and how hard you drive the car

Check your fuel pump pressure and filter.

SERVICE IT .....OIL PLUGS, AIR ,FUEL AND OIL FILTERS GET TROTTLE SENCOR AND THE MASS AIR FLOW SENCOR CHECKED

did you supply them with the vin.#? sometimes they need that to get the correct part.

well maybe there was some mis-communication there , nissan stopped using timing belts in sentra's and actually most all models in 2000 , maybe they were telling you that your serpentine belt needed changed ? but to answer your question , you do not have a timing belt in your 2002 nissan sentra . its a chain . thanks

J5

if the fuse to the radio is ok. i would suspect the radio is no good. i have replaced several in sentras!!