Edis1234

My satnav on the car seems to have developed a fault and can no longer position itself.

ive spent the last couple of weeks somewhere near York according to the map, smd now somewhere near Nottingham.
is seems to orientated itself correctly smd the map rotates as I drive, but the actual position is miles out.

Any suggestions? I’ve read on some posts it could be the GPS aerial that’s failed and it may be in one of the wing mirrors.
does anyone know which mirror and what’s involved in accessing it?
whats the cost of parts and are they easy to fit, or will it the require some programming and setting up?