2023-2024 Ford Mustang
FCC: M3N-A3C108397
PN: 164-R8347/5945957
434mhz
Ford released a new FCC Key ending in 339 in 2022. It will start with the old FCC ending in 426, but the proximity will not work. In addition, they released another FCC ending in 397 in 2023 which switched to 434 MHz. These keys are NOT interchangeable. It is important that you know which one you need.