Have had nothing but issues since first installed (wired to my 5215) a couple years ago. Most recent issue is that wind
speed does not record
at 100 to 120 MPH. Other things like wind direction works fine. Garmin service
says one more time: send the unit back and pay us $359 and they'll send a new one--have done that before and new one works for a while.
Does anyone else have this wild speed read-out problem. And do you have any suggestion for how to trouble shoot it--besides paying Garmin