Smog Check, Fremont, CA Mowry Smog Test Only, located on Mowry Avenue in Fremont, California, provides services for test only vehicles, gross polluters, and regular smog checks. We are a fully qualified, licensed smog test facility ready to provide you with accurate & reliable service. Customer satisfaction is GUARANTEED when you visit. We will have you in out fast, so you are back on the road to do the things you have planned for your day. If you have any questions or comments, do not hesitate to contact us (510) 648-3988 ; we’d love to hear from you.