Is there any area on the windshield on older (2013-2014) models where an RFID transponder will work?
Is there any area on the windshield on older (2013-2014) model S where a transponder will work?
To the right of the rear view mirror (dotted area).
Place it up against both the headliner and the passenger side of the rear view mirror.
Velcro the transponder to the under side of the cargo cover. The signal goes thru the rear window just fine. Out of sight out of mind.
That area worked in my car until I got the windshield replaced.
Will give that a try.
I may be totally wrong, but I don't think there is RFID in the FOB. I think you can get the FOB to work with a low battery by getting close to one of the antennas (there are qutie a few arround the car).
Here's the test I did - remove the battery from the FOB. I could not find any place that would detect the FOB, including inside the car.
Looking at the spec sheet for the FOB IC, they do have a low battery mode that will work for a while (not stated how long).
@TeslaTap: This thread is about RFID transponders (like EZPass), not the key fob. :-)
@EvRider - missed that! EZpass, etc. are not RFID transponders. RFID is for very short distances, typically 1 cm or so. The Model 3 access card uses RFID and at one time, people thought the FOBs did too.
Really makes it confusing to mix incorrect terminology and I was reading the entire thread as if the OP was talking about a dead FOB using RFID tech and you place it on the windshield (there is a recommended place on the windshield for a FOB that is not working normally).
@stockboy - You might change the title (only you can do that) to "Transponder location".
Both the EZpass and the fob have active RFID transponders. These receive an RF signal and reply with a battery powered transmitter. Some encryption computations are made to allow the original transmitter to validate the transponder.
@Daisy - You're right and I'm wrong. I was thinking of passive RFID. I wasn't even aware of active RFID! Ok, back to school for me :(
Then there are windshield mounted RFID tags that don’t use batteries but have longer range than the passive RFID like the Model 3 key card. I have one of these RFID tags on my Model S to open the gate at my community, but I had to use an externally mounted one (on the headlight) because it wouldn’t work through the Model S windshield (2016 and 2018 models). Note that the Model 3 windshield is transponder-friendly.