When I got my ezpass, the rep said it can be anywhere in the car & it would be read when i go through a booth.

I registered the transponder & got the app too. Placed the transponder in my glove box because I didn’t want anyone to steal it.

And away I go. Toll after toll. Then Toll by plate invoices came in one by one. $140 total, i kept calling customer service they’d correct it, giving me ez pass rate. Then one smart customer service rep asked:

“where is your ez pass?

The glove box!

“Oh no, it has to be mounted on windshield, behind rear view mirror.” She said.

Problem solved.

The transponder is “turned on” once it’s registered with ezpass and it has to be properly mounted in car to be read.

I’m not saying you didn’t do this, just sharing my experience.