. Anyone have thoughts on this. Car is a 2011 CR-V petrol auto. At idle the air con causes a juddering through the whole car, not serious, a passenger would not notice, but I feel it through the steering and seat. It's only really noticeable at idle, the engine idles at about 700 revs but it fluctuates up and down a bit Turn off the air con and I only know the engine is running by the tachometer . The air con works fine, I am aware that the air con is an extra load but apart from feeling it kick in I have never had this on previous cars. I notice on this site there is an extended warranty on the air con but only up to 2010.