Ive been using Hesperia Smog center for years now. They seem to be very competitive on their pricing and have always seem fair. Their service is quick and recently while I was in there the employee was making sure a customer had given them all the information they would need so the test would not be a waste of time and money for that customer. And the employee explaned why the questions were being asked. I thought that was very professional of Hesperia Smog. The building is old but the parking lot is very large.
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