I bought tires at the Sahuarita AZ. Walmart. It took 3 hours vs. the 1 hour I was quoted on the phone. Myra at the counter and one of the mechanics spent a half hour arguing in front of me and other customers about who was supposed to fix the erroneous bill. The final bill was $40+ over what I had been quoted( apparently "out the door" means something different there). I had also asked them to look at a Tire Press. Sensor (TPS or TPSM). The individual working on the car indicated he had a kit that could fix it. It was never looked at and now that they have moved the tires around I have no idea (neither do they) where the suspect sensor is. I spoke with an Asst. Manager named John who stated he was sorry for the inconvenience, but that was the limit of his help. In short, spend the extra $50-$70 and go to a professional.