I work in a tire shop, so unfortunately I mess with these things daily.
-could be nothing, running part change from Toyota?
-diameter of rubber seal could be different, make sure it seals up tight
-height of rubber seal could be different, causing sensor not to fully clear the rim, which makes the sensor a little cock-eyed and then again it may not seal
-washers or spacers are sometimes included/deleted for same reason, to make sure sensor clears rim.
We use Dill brand sensors, and they show the sensors are interchangeable between the 2 years...
Dill Air Controls Products » Sensors
You shouldn't need the ID #s off the sensors, but I guess it depends who is doing the reprogramming. We use a tool that simply scans the sensors after they're installed, and then plugs into the OBDII to transfer the info to the vehicle's ECU. Fairly easy.
Don't forget the sensor in the spare!!! Thanks for that, Toyota!!!
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I like my droop droopy
Front: Swayaway 2.5s + TC UCAs--Rear: Swayaway 2.5s + Icon 3.0 springs + Light Racing Jounce Shocks — 285/70R17 BFG KO2s
My build:
http://www.toyota-4runner.org/4th-ge...ld-thread.html