For owned trailers or unsupported third-party mods, the developer included a manual workaround via the menu: Navigate to Audio Settings .
Select from the voice navigation dropdown. Click Preview (this activates the sound in the background). REEFER TRAILER SOUND ADDON V1.0.8 1.46
: Adds a constant engine hum that is audible both outside the trailer and from within the truck cabin. For owned trailers or unsupported third-party mods, the
: Confirmed for the Freight Market and External Contracts. : Adds a constant engine hum that is
: Functional, though you may need to disconnect and reconnect the trailer once to trigger the sound cycle. The "Voice Navigation" Workaround
To function correctly, this addon requires the to be active and set to a high priority in the Mod Manager. It relies on the trailer tire sound definitions to carry the reefer sound loop. Trailer Compatibility The mod is confirmed to work across various modes and DLCs: