Star Smog Check Too Test Only & DMV Registration Santa Ana, CA is an official Star certified smog test only & registration center offering all types of DMV required smog tests which includes the Biennial smog check, smog check test, out of state, vehicle registration smog test, diesel smog check, regular smog check, registration renewal smog check, gross polluter certification, change of ownership smog test, vehicle smog check. In our Smog test only center, we offer free electronic smog certificate transfer to DMV that is included in our smog check coupon.