the fan had his lifespan long ago in an old pc en worked for more than 5 years 24hours a day in an atmosphere of 70-90 degrees so what is the problem with mixed air of -ish ..... 40 degrees
will it last till my c5 is 50 years 2035
Sorry i was in techie/newbie mode if that makes sense, but seriously, find the cause of the heat and why, what is getting hot, if its a controller and hidden in the boot, it wont get much air, move it into an airstream, the extra fan will reduce your range, not by much but it will.
What are the chracteristics of your controller, do you have a spec sheet?