Ez pass problems

Ez pass problems

My ez pass is not being recognized since placing it in my model s, was fine in the BMW. Worked when holding it out the passenger window. Anyone else experiencing this, any theories?

jdb | March 18, 2013

Never mind my last post, the sunpass does not always work with temporary fix so will try again under rear mirror on windshield. By the way, sending this from vehicle while in parking lot, very cool to be able to send messages from car, features like that sure make up for small issues like sunpass inconvenience.

bobinfla | March 18, 2013

@jbd: The external mount Sunpass can be mounted under the nosecone and works like a charm. Only issue is if you are in South Florida and need to be able to disable the Sunpass in the bag when you get free tolls for EV on the 95 expressway. The external pass has to be ordered direclty from Sunpass, not available in any stores, then takes about a week to arrive in the mail. Tesla Service center in Tampa was nice enough to pop the nosecone, drill a couple holes and mount it for me.

rsigman | March 26, 2013

I have tried various places on the windshield, none of which worked. I tried the external EZPass inside the nosecone and that did not work. I have not yet tried above the rearview mirror. I have had 100% failure at the Throgs Neck and Whitestone bridge tollbooths. Has anyone had success with any mounting locations in going through any NYC tollbooths?

CC | March 27, 2013


I have tried mounting the EZ pass right on the inside of the nose cone itself, rather than putting it on the steel/boron bumper. This seen s to wrok 50 to 60% of the times.

mcx-sea | March 28, 2013

@ DouglasR

Did you just use the Velcro that came with your pass?

Is the bar code on the driver's or passenger's end on your mirror?

CC | March 29, 2013

Seems like the location 3146 point out works for me as well, right above the mirror on the plastic base. Mounting is an issue, so far i have zip tied it (see pics, link below), may try velcro straps for cables. Anyone else have better mounting ideas?

DFibRL8R | March 30, 2013

I mounted mine slightly towards the left on the more flat plastic cover using the adhesive Velcro supplied with the pass. Left side of pass "floats" in the air but right side plus an added pieced of Velcro have so far held it and I'm 3 for 3 for it working through Virginia's ez pass system.

DouglasR | March 30, 2013


Yes, I just used the Velcro that came with the pass. The smooth side is up, the Velcro side is down (obviously). The bar code is at the driver's side of the mirror (the "G" is to the passenger's side), but I doubt very much that it matters. It is basically centered along the top edge of the mirror, and you have to look pretty hard to see it.

Other types of passes may not fit very well at this location. The Good to Go "popsicle stick" pass is about 5 or 6 inches long and about 5/8 inch wide, and quite thin. It is mounted with Velcro so that it can be easily removed to use with a different vehicle or where it would result in unnecessary charges.

mcx-sea | March 30, 2013

@ DouglasR

Thanks for confirming my hunch. On;y one more week before the paper tag expires and the G2G starts collecting for the new bridge!

DouglasR | March 30, 2013

My recommendation is to also register your license plate. That way, if the pass isn't recognized, you will pay just 25 cents more (rather than a huge late fee, etc.). However, mine hasn't failed yet, and I've crossed the bridge maybe a dozen times.

pablodds | March 31, 2013

I have used the Florida sunpass now for two weeks under the rear view base and seems to be working all the time. Have not had any violations show up on my activity report. I hope it continues to work...

CarlE_P439 | April 2, 2013

Whoever suggested placing EZ Pass tag on the black plastic part that attaches the mirror to the windshield, thanks! Works flawlessly!

DSK | April 2, 2013

@bp and others:

I have two AVI type stickers (RFID flat sticker mounts), one for the Georgia toll roads (Peach Pass) and one for my work garage.

It took some experimentation, but as a couple of other people already note (and I thought I was going to be the first), I have slide each of them under the black plastic housing of the rear view mirror. I have NOT removed the backing for the sticky side. I think they will stay, or I may use a small piece of double stick tape.

I have tested each, they both work great now. I can post or send pics if anyone needs them.

The peach pass sticker is long and thin, that one is almost completely hidden under the plastic housing.

The work garage AVA is credit card sized and the main part is under the housing (and pushed up under the fabric above) and about 1/3 is exposed.

But it all works!

It would have been very helpful if Tesla had given us easier access to under the nose or the front part of the roof (the 7" wide or so strip that runs between the windshield and the pano roof).

Hodas | July 4, 2013

Our new Los Angeles FastTrak needs to be mounted somewhere convenient, because our transponders have a switch to set how many people are in the car, as HOV access/charges on the 110 and 10 freeways varies for time of day and number of passengers.

Fortunately, the spot next to the rearview mirror seems to be working ok for me.

I was faced with the problem of ALSO having an RFID credit-card-style parking pass for work. I was going to just live with swapping it and the FastTrak as needed (fortunately my FastTrak use is mostly on the weekends), but I discovered that velcroing it to the inside of the small triangle of glass at the front part of the driver door works. You could not fit a FastTrak/EZpass there, but for card-style transponders this appears to be an option.

billmccomb | January 11, 2014

I solved my Model EzPass problem. As others instruct, I place the ezpass right up against the fabric headliner, to the right of the stem that attaches the rearview mirror. But I have two big blobs of sticky tack on each side of the ezpass, so i can pop it up there when i am going on the turnpike or through a tunnel requiring the ezpass. when I'm done it pops right off. works like a charm. on and off easily.

I had all the problems everyone else has until i did this...

jeffrey.begens | January 11, 2014

I live in South Florida. We have Sunpass. You can buy a special Sunpass and mount it in the front inside of the car. You have to order it. The Tesla service center did the install for me for free. Works fine and you do not see it. Why clutter the inside of the car?

DallasTXModelS | January 11, 2014

I was just issued the black bar license plate type like in photo by NickJHowe by Dallas NTTA tollway operators in nort Texas. They gave me a sheet to go to 2 Speedee Oil Change locations to have it installed. The license plate mounted transponder was originally brought to NTTA for Mercedes owners. They have the same coated windshields that are used as antennas for the radio.

I told the lady Tesla said they would install it for me. I have an appointment at the Service Center 17 Jan 2014.

jbsiegelmd | January 11, 2014

It doesn't read a NTTA tag properly when placed behind the nosecone on the bumper. I had Jack at the Service Center put my first one there but it doesn't read properly.

You have to have them mount it on the exterior of the grillwork with toggle bolts or zip ties and then it will read properly. Jack knows which spot gives reliable reads for the pictured 'license plate' device.

DallasTXModelS | January 11, 2014

He said mine would be put in front of the grille and because it is black it doesn't show. I said mine is the bar like in the picture not installed like in the picture.

Mboni | February 4, 2014

I've tried everything and I still have problems in PA and NJ. I placed the interior transponder all over the windshield and nowhere did it work. It will work if I hold the transponder outside the window as I approach the toll gate. So I got a bumper transponder from the NJ Port Authority and had my Tesla Service Center install it with adhesive, behind the nose cone. I just went on the PA Turnpike and it did not read the transponder. I don't know what to do at this point. You can't believe how many violation notices I've received and have had to deal with.

plusplusjames | February 4, 2014

@Mboni: Have you registered your license plate number with EZ-Pass (or whichever toll tag you use)? They can read the plate number and debit your account without penalty.

Brian H | February 4, 2014

Duct tape the transponder to your roof?


kenj | February 4, 2014

@Jthompson there is no external "green" EZ pass transponder for NY

Doug H | February 4, 2014

I'm not from NY but I mounted mine on the passenger side of the inside rear view mirror. Mounting on the driver's side didn't work. That's in the black dotted area just below the roof.

Ragtimer | February 5, 2014

Mount it on top of the rear view mirror - not on the windshield at all, but on the flat surface at the top of the mirror. Has worked every time since I did this -

claude | February 28, 2014

I recommend going with the NY EZPass system even if you don't live in New York. But you have to ask for the front license plate mounted transponder. They sent me the exterior front license plate transponder based on a single call to customer service! I didn't have to return the windshield mounted transponder and they didn't charge me anything. They also will send you new transponders every five years without you having to even request them. In contrast (I live in Massachusetts) the FastLane, now EZPass Massachusetts service is horrendous. They want you to wrap your old transponder in foil and send it in and wait for two weeks while they "test" it to determine if it needs to replaced or if they will send you a new one. They never offered an exterior transponder.

JenAlJill13 | February 28, 2014

I had an old style EZ Pass (squarish looking thing) from NY EZ pass which I used when I worked in NJ. It was fine in the Tesla mounted under the mirror. A couple of months ago I got a new one from Delaware since I travel in PA and DE much more than I do in NJ and NY now. That one ( about half the width of the old EZ Pass but thicker) does not work. I sent it back to DE and got a new one which also doesn't work when mounted in the same location as the NY one. I'm using the old EZ Pass from NY and everything seems fine. Still, this is an issue that the folks at Tesla should resolve. We don't want to jump through hoops to do something that every other car can do easily.

ptgarcia-Oklahoma | April 15, 2014

Friends, I have been working on this issue for over two years.
I am the Vehicle Specialist for the Oklahoma Turnpike Authority's Pikepass System. After extensive testing, this is what I know:

The "Cut-Out" (The shaded area to the right of the mirror-module) in te 2012 & 2013 models does not work sufficiently to allow most toll transponders to work correctly. (Your tolling Authority is likely pulling their hair out over your account) I brought this to the attention of George Blankenship at Tesla and his office confirmed the problem in early 2013. Based on my preliminary tests of the 2014 Model S, this field has been redesigned to allow significant improvement in transponder performance. It's not perfect but it is much better than before.

To answer several questions addressed in this thread:
* The roof panel is Infrared Reflective as well so the transponder will no work in this location.
* Attaching an external transponder behind the nose cone will not achieve satisfactory results.
* If you own a 2012 or 2013 Model S, the best bet is to use an external transponder mounted on your front license plate bracket. If your state does not use front plates as is the case in Oklahoma, you can attach the transponder (black bar) to the lower grille, just above the splitter. You can wire it to this grille or, if you remove the nose cone, I believe you can use a backer plate and gently bolt the bar to the grille to ensure its security.

If you have any questions, you may contact me at my office

Paul Garcia

tes-s | April 15, 2014

Paul - I have an ezpass transponder from NY ezpass mounted to the right of my mirror in my August 2013 MS. I have used it probably 100 times in 7 months without a single read failure.

I know others have reported problems, but my ezpass transponder has worked flawlessly.

tes-s | April 15, 2014

Also, never been to Oklahoma in my MS. But it has worked in ME, NH, MA, NY, NJ, PA, and DE.

SCCRENDO | April 15, 2014

In Ca I also have my Fastrak transponder to the right of the mirror and works great

ptgarcia-Oklahoma | April 17, 2014

Thanks for the valuable info. I will investigate if there was a mid-2013 change in the windshield.
On another note, Oklahoma windshield transponders are stickers and don't have batteries. Case passes will have a battery and will be a bit stronger. I'll look into all scenarios.

MitchP85D | April 17, 2014

Mine is installed at the top of the license plate. Looks like a thick license plate bracket. No problem there. I did this after initially having it installed in the nose cone. The EZ-Pass did NOT work in the nose cone.

SkyWalker | January 16, 2015

Have Colorado model S owners had any problems with express toll reading on E-470?

TaoJones | January 16, 2015

For those in California who haven't been added to the "Tesla list"...

After you've registered via the website, just ask to be added to such a list. Your license plate will be scanned and no charges will accrue to your account (except for the standard toll road charges that everyone pays regardless of vehicle type). No need for transponder mounting, in other words.

Interesting advice to register for, say, New York lanes even if not a New York resident. Hadn't considered that but it would sure make things easier *if similar lists exist in other states for long roadtrips and such.

Bighorn | January 16, 2015

I've seen CO owners put the E-470 sticker on the headlight. I think it may have been the motorcycle version. I haven't placed mine yet, but I think it needs to be outside the cabin to work.

SkyWalker | January 16, 2015

Thanks for the info Bighorn- I asked about this when I had a test drive & was told it was not a problem. After reading comments in the forum from owners in other states, I was wondering about Colorado...

Haggy | January 16, 2015


I don't follow. After registering what by what website, ask where to be added to the list, and who gets asked?

TaoJones | January 17, 2015


Fortunately, your three questions have the same general answer. Probably would have been helpful had I remembered to paste the appropriate URL after the first paragraph:

More thoughts:

When one registers at the above website, one may be informed that transponders are out of stock and that one should go to a walk-in service center. It was at such a center that I was informed that they too were temporarily without transponders (except for one broken one). They very kindly updated my registration with the personalized plate I had/have not yet received, noted that the car was now added to "the Tesla list", and that hereafter no transponder would be necessary since their cameras would read my plate.

That is to say, once plates are received and put on the car. The Tollroads folks made sure to offer the following caveat/reminder, which admittedly *only* applies to new owners: Wait to use the HOV lanes until plates are on the car (or until the transponder eventually shows up (backordered so far)). Otherwise, the tickets *start* at $491. I didn't ask about stickers.

Frustrating, the tangential requirements for a front plate and, separately, for 3 white stickers. However, with a completed registration with the Tollroads folks, at least we don't have to worry about whether the transponders are mounted wherever. That said, while rereading some of the older posts in this thread, it appears that there is a possibility that one may still get pulled over if a cop does not see a transponder mounted somewhere; one wonders if this isn't simply another handwringing urban legend.

Everyone's level of risk tolerance is different - whether for transponder location (windshield or glovebox), window/windshield tint, and the stickers (3 or 2 or 1, on the paint, on the lower plastic, taped in the windows).