All smog Center is a licensed smog check station offering all types of DMV required smog tests which includes regular smog check, biennial smog check, smog check test only, out of state smog checks, vehicle registration smog test, diesel smog check, registration renewal smog checks, gross polluter smog check certification, change of ownership smog test, and vehicle smog inspection. In our test only center, we offer a free re-test which is included in our smog test coupon.