Price
Call for price
Hours
Open Mon–Sat
Station type
Test Only
Appointments
Walk-ins welcome
Hours
- Monday
- 7:30 AM – 6 PM
- Tuesday
- 7:30 AM – 6 PM
- Wednesday
- 7:30 AM – 6 PM
- Thursday
- 7:30 AM – 6 PM
- Friday
- 7:30 AM – 6 PM
- Saturday
- 7:30 AM – 5 PM
- Sunday
- Closed
Good to know
Languages
English
Payment
Credit Card, Debit Card
What to expect at Sia Auto
Sia Auto is licensed by the Bureau of Automotive Repair as a Test Only smog station in Compton. 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?
- Sia Auto 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.
2120 E Rosecrans, Compton, CA 90221
Get directions →Hours
- Monday
- 7:30 AM – 6 PM
- Tuesday
- 7:30 AM – 6 PM
- Wednesday
- 7:30 AM – 6 PM
- Thursday
- 7:30 AM – 6 PM
- Friday
- 7:30 AM – 6 PM
- Saturday
- 7:30 AM – 5 PM
- Sunday
- Closed
Also listed on
Other stations near Sia Auto
Non-Stop Test Only Station
1845 Rosecrans Ave
Kim's New Auto Smog
1620 North Long Beach Blvd
Madrigals Auto Center
15022 S Atlantic Avenue East Rancho Dominguez
Comptonsmog
1119 E Rosecrans Avenue
Shell Smog Check
700 E Rosecrans Ave
Nearby cities in Los Angeles County
Questions about Sia Auto
Sia Auto is open Monday 7:30 AM to 6 PM; Tuesday 7:30 AM to 6 PM; Wednesday 7:30 AM to 6 PM; Thursday 7:30 AM to 6 PM; Friday 7:30 AM to 6 PM; Saturday 7:30 AM to 5 PM. Closed Sunday. Hours can change on holidays, so call ahead if you are cutting it close.
Sia Auto accepts Credit Card, Debit Card.
Google lists the following accessibility features at Sia Auto: wheelchair accessible entrance, wheelchair accessible parking.
Sia Auto has held a BAR smog license since 2002. You can verify the license status at bar.ca.gov.
Sia Auto 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 (310) 763-0274 for a quote.
Sia Auto does not take online bookings here, but walk-ins are welcome. Call (310) 763-0274 to check the wait.
Staff at Sia Auto speak English.
The closest alternatives in Compton are Non-Stop Test Only Station (0.2 mi) and Kim's New Auto Smog (0.5 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: South El Monte • Licensed since 2002