McHenry Smog Center

McHenry Smog Center is a STAR certified test-only smog check station in Modesto, CA.

4.8(476 reviews)

3536 Mchenry Ave Unit B, Modesto, CA 95356

Price

Call for price

Hours

Open 7 days a week

Station type

Test Only

Appointments

Walk-ins welcome

STAR Certified - Authorized for directed vehicles and gross polluters

Hours

Monday
8:30 AM – 5 PM
Tuesday
8:30 AM – 5 PM
Wednesday
8:30 AM – 5 PM
Thursday
8:30 AM – 5 PM
Friday
8:30 AM – 5 PM
Saturday
8:30 AM – 5 PM
Sunday
8:30 AM – 1 PM

Good to know

Languages

English

Payment

Cash, Credit Card

What to expect at McHenry Smog Center

McHenry Smog Center is licensed by the Bureau of Automotive Repair as a Test Only smog station in Modesto. 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?

  • McHenry Smog Center 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.
Repair assistance (CAP)
McHenry Smog Center3536 Mchenry Ave Unit BOpen in Maps

© OpenStreetMap © CARTO

3536 Mchenry Ave Unit B, Modesto, CA 95356

Get directions →

Also listed on

Google Business Profile

Other stations near McHenry Smog Center

Modesto Mazda

4100 Mchenry Ave

4.8(535)0.6 mi
Test & Repair

Audi Modesto

4151 Mchenry Avenue

4.8(1,003)0.7 mi
Test & Repair

Smog Check Unlimited

325 Motor City Ct

4.6(257)0.8 mi
Test & RepairSTAR

Valley Smog & Tags

4629 Spyres Way

5.0(27)1.1 mi
Test Only

Central Valley Volkswagen Hyundai

4620 North Mchenry Avenue

4.6(1,326)1.1 mi
Test & Repair

Nearby cities in Stanislaus County

Salida4.9 miRiverbank5.5 miCeres6.9 miOakdale11.3 miWaterford14.2 miPatterson14.6 miTurlock14.7 mi

Questions about McHenry Smog Center

McHenry Smog Center is open Monday 8:30 AM to 5 PM; Tuesday 8:30 AM to 5 PM; Wednesday 8:30 AM to 5 PM; Thursday 8:30 AM to 5 PM; Friday 8:30 AM to 5 PM; Saturday 8:30 AM to 5 PM; Sunday 8:30 AM to 1 PM. Hours can change on holidays, so call ahead if you are cutting it close.

McHenry Smog Center accepts Cash, Credit Card.

McHenry Smog Center has held a BAR smog license since 2004. You can verify the license status at bar.ca.gov.

McHenry Smog Center 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) 544-2944 for a quote.

McHenry Smog Center does not take online bookings here, but walk-ins are welcome. Call (209) 544-2944 to check the wait.

Staff at McHenry Smog Center speak English.

The closest alternatives in Modesto are Modesto Mazda (0.6 mi) and Audi Modesto (0.7 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

Ver en español

BAR field office: Fresno • Licensed since 2004

CallDirections