[Model flyer]

The D5 thermostat is not like the thermostats fitted to the cars of yesteryear , simple half hour job to change . It comes fitted in a ali casing and cost over £100 cant remember the exact price . Its also a so and so to fit as its tucked behind the engine just above the turbo and without a hoist is very difficult to get to . Well worth letting a main dealer fit it unless your a masochist :-) My son met the fitter who had just fitted a new thermostat to his V70 when he collected the car and he was not a happy fitter .Fitting cost him £240 ish if memory serves ,that was about 5 years ago . As for changing them every five years , that might have been an option when it was a simple job . The fan should definitely not be running all the time . Whats really annoying is the lack of a Temp gauge on modern cars due to penny pinching manufacture. Instead a plug in OBD11 reader is needed to see if it running at correct temp.