Welcome to Tesla Motors Club
Discuss Tesla's Model S, Model 3, Model X, Model Y, Cybertruck, Roadster and More.

Later production MS and TCA transponder

Many have reported that their toll transponders won't work from inside the Tesla. The solution provided by the Tollroads Authority is to give you an external transponder. However, this will not work with I-110 and I-10 toll lanes in Los Angeles for free tolling. You need the internal model with the three position switch, set in the "3" position.

My July build has a solid black area to the right of the rear view mirror at the top of the windshield. Like others, I had tried holding it there and found it did not register when passing the toll readers.

However, the issue is positional. Placing the transponder with the switch closest to the rear view mirror, it reads 100% of the time. Any other positions, it fails 100% of the time.

Hoping this helps those who commute in LA and the OC.

About Us

Formed in 2006, Tesla Motors Club (TMC) was the first independent online Tesla community. Today it remains the largest and most dynamic community of Tesla enthusiasts. Learn more.

Do you value your experience at TMC? Consider becoming a Supporting Member of Tesla Motors Club. As a thank you for your contribution, you'll get nearly no ads in the Community and Groups sections. Additional perks are available depending on the level of contribution. Please visit the Account Upgrades page for more details.