Generac A0000509466 CO (Carbon Monoxide) Sensing Unit V2.5 EFI. This does not fit all portables with a CO sensor. If you need help identifying which one is correct, please contact us with the serial number of the unit.
Generac replacement parts will also usually fit the following Generac branded generators: Honeywell, Guardian, Siemens, Carrier, Watchdog, Centurion, & Bryant.
If you need Generac generator troubleshooting support, please visit our interactive forum