Under normal use, firmware updates are not recommended for any CarlinKit model.
1, If the firmware update causes the product not to connect/only lights up red, then the firmware can be updated via USB stick to restore normal use.
2, If even the red light does not illuminate, then this can only be resolved by returning the product to the factory for repair (expensive and highly discouraged).
When the CarlinKit does not work properly, please detail your CarlinKit model, car model, firmware version, and problems encountered during use, please contact us via email(support@carlinkitcarplay.com).
Note: Our service is for items purchased from carlinkitcarplay.com.