Smog Check in Ontario, CA

Station data: California Bureau of Automotive Repair (BAR) Auto Shop Locator, retrieved September 18, 2026. Not affiliated with BAR.

BAR’s Auto Shop Locator lists 34 licensed smog check stations in Ontario. 20 are STAR stations, 16 are test-only stations that inspect vehicles but do not make emissions repairs, and 18 are test-and-repair stations. Each listing shows the station’s address, phone number and BAR license number. BAR does not publish prices or opening hours, so call before you go, or use our free quote form and let stations come to you.

Most of these stations are in ZIP codes 91762 (16), 91761 (11), 91764 (7).

Smog check stations in Ontario, CA

STAR stations are listed first, then alphabetically. Showing 34 of 34.

Smog check questions in Ontario

How much does a smog check cost in Ontario?

BAR does not regulate smog check prices, so each station in Ontario sets its own. The station must give you an estimate that you approve before the inspection starts, and it must charge the $8.25 Smog Check certificate fee. Call two or three stations before you go. Our cost guide explains what moves the price.

How long does a smog check take in Ontario?

BAR says an inspection usually takes about 30 minutes. Time spent waiting depends on the station, so call ahead. More in our guide to smog check times.

Do I need a STAR station in Ontario?

Only if your DMV registration renewal notice says "Smog Certification Required at a STAR station". Otherwise you can use any station licensed to do smog checks. 20 of the 34 stations listed above are STAR stations. See what STAR means.

Do I need a smog check in Ontario?

If your DMV registration renewal notice says a smog certification is required, yes. Most gasoline, hybrid and alternative-fuel vehicles from model year 1976 on need a smog check every other year, with exceptions listed in our requirements guide.

STAR, test-only or test-and-repair?

BAR describes three kinds of stations that can perform an inspection. A test-and-repair station performs smog checks and emissions repairs. A test-only station performs smog checks but does not make emissions repairs. A STAR station meets higher performance standards and can inspect all vehicles, including high-polluting ones. Read the full comparison in our test-only vs test-and-repair guide.

Other cities in San Bernardino County

Fontana, Victorville, Hesperia, San Bernardino, Redlands. See the San Bernardino County page for the rest of the county.