In such cases special mounting instructions must be followed or an exterior transponder.
Roof mounted ipass transponder.
Many of today s luxury and higher end cars use metal oxides in their windshields and that diminishes the signals from regular transponders.
Roof align the transponder on the windshield behind the rearview mirror at least one inch below the metal roofline and one inch to the right or left of the mirror post.
The mounting location must provide direct line of sight communication between the transponder and the toll facility s overhead antenna.
Apparently the new version of the model 3 manual has information on where a transponder should be mounted.
The right side of mirror mount housing.
Fme transponders cannot be used where local regulations prohibit externally mounting transponders on the roof of the vehicle.
Attached to the glass up against that pillar between the roof and rear window glass.
Not in my line of sight while im driving and still works fine.
Oct 14 2014 messages.
Mounting tips select a mounting location within 4 inches of the centerline as measured from the right and left sides of the vehicle.
Properly install your transponder to ensure the transponder is read accurately it should be properly mounted on the vehicle s windshield using the removable mounting strips.
Autoboxclub clear ez pass holder ipass holder toll pass holder for most us states toll pass windshield mount easy to install and remove with 4pcs toll pass mounting strips uv protective 1 pack 4 7 out of 5 stars 980.
I pass mounting instructions ai author.
Roof mounted transponders must be mounted on the roof of the vehicle.
Roof mounted the roof mounted transponder is recommended for large commercial vehicles such as trucks buses coaches and rvs.
Fme transponders programmed for rooftop must be mounted on the roof of the vehicle.
Mounting strips are available at no cost at all customer service centers and every manned toll plaza.