Smog Check in Modesto, CA

Test & Repair versus test-only

California licenses smog stations in different ways. A test-only station is allowed to inspect a vehicle and issue a certificate if it passes, but it is not allowed to repair the car. If your car fails at a test-only station, you leave with a failed report, find a repair shop somewhere else, pay for the repair there, and then go back for another test.

A Test & Repair station can do both. If your car fails here, the repair department on the same lot can diagnose why, quote the repair, carry it out with your approval, and the car can be retested at the same address. One drop-off, one place to ask questions, one set of people who have seen the failure report.

The station is listed as a STAR-certified Test & Repair station. If your DMV renewal notice says your vehicle must be certified at a STAR station, that is the kind of station the notice is asking for.

Retesting after a repair, at the same address

The part people underestimate is the retest. After a repair, the car's onboard computer often needs to complete its self-checks, called readiness monitors, before a retest can be valid. Having the shop that did the repair also run the retest keeps that whole sequence in one conversation instead of you relaying it between two businesses.

We will not promise that any particular car will pass. What we can say is that a failure does not send you back out onto McHenry Avenue looking for somebody else.

DMV renewal, change of ownership and out-of-state cars

Most smog checks start with a letter. Your DMV registration renewal notice tells you whether a smog certification is required for that renewal. If it says one is, the station sends the result electronically to the DMV once the car passes.

Selling a car in California generally means the seller provides a valid smog certificate to the buyer, with exceptions such as very new vehicles and certain transfers between family members. A smog certificate is valid for 90 days, so time the test with the sale.

Bringing a vehicle in from another state usually means it needs a California smog certification as part of first registering it here, along with a VIN verification. Your DMV paperwork will tell you exactly what applies to your vehicle.

What to bring

Bring the vehicle and your DMV renewal notice if you have one. If you are registering an out-of-state vehicle, bring the paperwork the DMV has given you. Before you come in, make sure the check engine light is off; a lit check engine light is an automatic fail.

If the battery was recently disconnected or replaced, or codes were recently cleared, mention it when you call. Those events can reset the readiness monitors, and the car may need ordinary driving before it is ready to test.

A smog and a detail in one visit

The smog department and the detailing department share one lot. If the car is coming in for a smog check before a sale, a renewal, or because you have just bought it, the same visit can include a hand wash, an interior shampoo or a full detail. Tell us both jobs when you call (209) 526-8688.

All work happens at CAR PRETTY, 4207 McHenry Ave, Modesto, CA 95356.

Smog checks for nearby towns

Common questions