At M&M Smog Test, all we do are smog tests. We don't spend time making repairs, so we are able to get you in and out in as fast as 15 minutes. We smog all vehicles, including diesel! STAR Certified smog checks. #1 smog test only center in all of Orange County, including transfer ownership. 100% customer satisfaction guaranteed. No appointment needed. We serve in San Clemente, CA.