433mhz. Call with your VIN number to ensure proper compatibility. This unit needs to be programmed to your vehicle. Requires GM on line access to program and a tech 2 divice!!! Fits SAAB 9-3 (2005-2011) ( Brand new OEM )If you are not sure if this part fits your vehicle, please feel free to call us at (888) 762-4883. Product #: Old P/N 12847563.