Price
Call for price
Hours
Open 7 days a week
Station type
Test Only
Appointments
Walk-ins welcome
Hours
- Monday
- 8:30 AM – 5:30 PM
- Tuesday
- 8:30 AM – 5:30 PM
- Wednesday
- 8:30 AM – 5:30 PM
- Thursday
- 8:30 AM – 5:30 PM
- Friday
- 8:30 AM – 5:30 PM
- Saturday
- 8:30 AM – 5:30 PM
- Sunday
- 9 AM – 2 PM
Good to know
Languages
English
Payment
Cash, Credit Card
What to expect at 4 Less Smog Check
4 Less Smog Check is licensed by the Bureau of Automotive Repair as a Test Only smog station in San Mateo. It runs the inspection and issues the certificate but does no repairs. 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?
- 4 Less Smog Check doesn't do repairs, so the car goes to a repair shop and comes back for the retest.
- 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.
3925 South El Camino Real, San Mateo, CA 94403
Get directions →Hours
- Monday
- 8:30 AM – 5:30 PM
- Tuesday
- 8:30 AM – 5:30 PM
- Wednesday
- 8:30 AM – 5:30 PM
- Thursday
- 8:30 AM – 5:30 PM
- Friday
- 8:30 AM – 5:30 PM
- Saturday
- 8:30 AM – 5:30 PM
- Sunday
- 9 AM – 2 PM
Other stations near 4 Less Smog Check
Ma's Auto Repair & Smog Station
2660 S El Camino Real
Smog Central
2107 Palm Ave Unit B
Norfolk Auto Service
2051 S Norfolk St
Master Mechanics And Smog
71 21st Ave A
Star Smog San Mateo
1626 S. El Camino Real
Nearby cities in San Mateo County
Questions about 4 Less Smog Check
4 Less Smog Check is open Monday 8:30 AM to 5:30 PM; Tuesday 8:30 AM to 5:30 PM; Wednesday 8:30 AM to 5:30 PM; Thursday 8:30 AM to 5:30 PM; Friday 8:30 AM to 5:30 PM; Saturday 8:30 AM to 5:30 PM; Sunday 9 AM to 2 PM. Hours can change on holidays, so call ahead if you are cutting it close.
4 Less Smog Check accepts Cash, Credit Card.
4 Less Smog Check has held a BAR smog license since 2025. You can verify the license status at bar.ca.gov.
4 Less Smog Check 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 (650) 762-8434 for a quote.
4 Less Smog Check does not take online bookings here, but walk-ins are welcome. Call (650) 762-8434 to check the wait.
Staff at 4 Less Smog Check speak English.
The closest alternatives in San Mateo are Ma's Auto Repair & Smog Station (0.9 mi) and Smog Central (1.4 mi). Both are listed further up this page with their ratings 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: San Jose • Licensed since 2025