Castroville Auto and Smog Services SmogStation 9 years ago Castroville Smog Coupon $29.75 Smog Check Coupon 2000 & newer + State Fees Not valid with other Smog Coupons Must Present Coupon in Mobile or Print Smog Check Castroville – Smog Check station offers smog check, smog test for all vehicles. Smog inspection, smog certification, smog testing, smog coupon and smog test repair.