Price
Call for price
Hours
Open Mon–Sat
Station type
Test & Repair
Appointments
Walk-ins welcome
Hours
- Monday
- 9 AM – 4 PM
- Tuesday
- 9 AM – 5 PM
- Wednesday
- 9 AM – 5 PM
- Thursday
- 9 AM – 5 PM
- Friday
- 9 AM – 5 PM
- Saturday
- 9 AM – 12 PM
- Sunday
- Closed
Good to know
Languages
English
Payment
Cash, Credit Card
What to expect at Lathrop Smog
Lathrop Smog is licensed by the Bureau of Automotive Repair as a Test & Repair smog station in Lathrop, so it can run the inspection and, if your car fails, diagnose and fix it in the same shop. It is STAR certified, so it can test vehicles the DMV directs to a STAR station, including gross polluters.
Walk-ins are welcome. Most smog checks take 15 to 30 minutes, and most visits are closer to 20.
What to bring
Your registration or DMV renewal notice
It says whether the car needs a STAR station.
The car, with the check engine light off
On a 2000-or-newer car, a lit check engine light fails the test on its own.
A way to pay
The $8.25 state certificate is paid on top of the test when the car passes, unless the station's price or coupon includes it.
What if I fail?
- Lathrop Smog can diagnose and repair the problem in the same shop, then retest the car.
- Each station sets its own retest price, so ask before the first test.
- BAR's Consumer Assistance Program pays up to $1,450 toward emissions repairs for income-eligible owners.
15151 Old Harlan Rd, Lathrop, CA 95330
Get directions →Hours
- Monday
- 9 AM – 4 PM
- Tuesday
- 9 AM – 5 PM
- Wednesday
- 9 AM – 5 PM
- Thursday
- 9 AM – 5 PM
- Friday
- 9 AM – 5 PM
- Saturday
- 9 AM – 12 PM
- Sunday
- Closed
Also listed on
Other stations near Lathrop Smog
Nearby cities in San Joaquin County
Questions about Lathrop Smog
Lathrop Smog is open Monday 9 AM to 4 PM; Tuesday 9 AM to 5 PM; Wednesday 9 AM to 5 PM; Thursday 9 AM to 5 PM; Friday 9 AM to 5 PM; Saturday 9 AM to 12 PM. Closed Sunday. Hours can change on holidays, so call ahead if you are cutting it close.
Lathrop Smog accepts Cash, Credit Card.
Lathrop Smog has held a BAR smog license since 2018. You can verify the license status at bar.ca.gov.
Lathrop Smog has not published a price on SmogCheckDeals. The Bureau of Automotive Repair puts the statewide average at $69.16 as of August 2026, about $65 for a 2000-or-newer vehicle and $73 for 1999-or-older, plus the $8.25 certificate fee. Call (209) 944-7181 for a quote.
Lathrop Smog does not take online bookings here, but walk-ins are welcome. Call (209) 944-7181 to check the wait.
Staff at Lathrop Smog speak English.
The closest alternative in Lathrop is Lathrop Quick Smog (1.5 mi). It is listed further up this page with its rating and hours.
How we get this data: BAR licenses and STAR status, Google hours and ratings, coupons published by the station.
Verify this station’s license and STAR standing at bar.ca.gov.
Own this shop? Add photos
BAR field office: Sacramento • Licensed since 2018