
Yes, you can generally use your E-ZPass on another car, but there are crucial rules to follow to avoid fines or account issues. The key is that the E-ZPass transponder must be properly registered to the vehicle you are actually driving when you pass through a toll. Most E-ZPass agencies require you to list all vehicles that might use the transponder on your account. If the car you're using isn't on your account, the toll system might not match the license plate to your valid account, potentially resulting in a violation notice.
The correct way to do this is to add the other vehicle's license plate number, state, and vehicle class (e.g., car, motorcycle) to your E-ZPass account online or via the agency's app before you use it. This links the car to your account. When driving, always mount the transponder correctly on the windshield. Using an E-ZPass registered to a passenger car in a commercial vehicle like a large rental truck usually isn't allowed and will trigger a violation.
Failing to update your account can lead to problems. The toll authority's camera will capture the license plate of the unlisted vehicle. Since it doesn't match your account, you could receive a fine in the mail, even though you have a transponder. Some agencies may offer a one-time courtesy adjustment, but consistent misuse could lead to account suspension. It's a simple administrative step that ensures seamless travel.
| E-ZPass Agency | Policy on Using Transponder on Another Vehicle | Required Action | Potential Consequence of Non-Compliance |
|---|---|---|---|
| E-ZPass New York | Allowed | Add vehicle to account online | Toll violation fee issued |
| E-ZPass New Jersey | Allowed | List all vehicles on account | Account may be suspended |
| Pennsylvania Turnpike | Allowed | Update vehicle information prior to travel | One-time courtesy adjustment possible |
| Massachusetts E-ZPass | Allowed | Register all license plates | Pay-by-Plate invoice sent, which may be higher |
| Illinois I-PASS | Allowed | Update account with new vehicle details | Violation notice and fine |

Absolutely, but you gotta log into your account first. I use mine between my car and my wife's SUV all the time. The trick is to add the other car's license plate to your account online. It takes two minutes. If you don't, the cameras will see a car that's not on your list and send you a fine, which totally defeats the purpose of having the pass. Just update your account online and you're golden.

Technically yes, but it's not a simple swap. The system works by matching the license plate captured by cameras to the plates listed on your E-ZPass account. If you use it in an unregistered car, that match fails. You might get away with it once, but you're risking a violation notice. To be safe, always take a moment to update your vehicle list through the official app before you hit the road.


