Just picked up my 2011 GX from the dealership this afternoon after having the identical problem fixed (replaced airpump). It has 81,000 miles on it and fortunely I bought it as a certified used vehicle with 29,000 miles and it came with a 100,000 mile warranty. Didn't cost me a cent today. I am convinced now that I will buy only used certified vehicles because the warranty is so much better than a new car. Doesn't make much sense does it?!