No appointment necessary
12401 Woodruff Ave #1
Downey, CA 90241
(562) 803-3030
Most cars
Coupon by: SmogCheckDeals.com
Price
Call for price
Hours
Open Mon–Sat
Station type
Test & Repair
Appointments
No appointment needed
STAR Certified - Authorized for directed vehicles and gross polluters
JJ's Auto Service is a STAR certified test-and-repair smog check station at 12401 Woodruff Ave #1, Downey, CA 90241. It has a coupon ($20 off). Open Mon–Sat.
Hours
- Monday
- 8 AM – 5 PM
- Tuesday
- 8 AM – 5 PM
- Wednesday
- 8 AM – 5 PM
- Thursday
- 8 AM – 5 PM
- Friday
- 8 AM – 5 PM
- Saturday
- 8 AM – 3 PM
- Sunday
- Closed
Hours from public business listings. Call to confirm before you go.
Photos of JJ's Auto Service
What to expect at JJ's Auto Service
JJ's Auto Service 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.
Its coupon says no appointment is needed. 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?
- JJ's Auto Service can diagnose and repair the problem in the same shop, then retest the car.
- BAR's Consumer Assistance Program pays up to $1,450 toward emissions repairs for income-eligible owners.
Been to JJ's Auto Service?
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12401 Woodruff Ave #1, Downey, CA 90241
Get directions →Hours
- Monday
- 8 AM – 5 PM
- Tuesday
- 8 AM – 5 PM
- Wednesday
- 8 AM – 5 PM
- Thursday
- 8 AM – 5 PM
- Friday
- 8 AM – 5 PM
- Saturday
- 8 AM – 3 PM
- Sunday
- Closed
Hours from public business listings. Call to confirm before you go.
Also listed on
Questions about JJ's Auto Service
JJ's Auto Service is open Monday 8 AM to 5 PM; Tuesday 8 AM to 5 PM; Wednesday 8 AM to 5 PM; Thursday 8 AM to 5 PM; Friday 8 AM to 5 PM; Saturday 8 AM to 3 PM. Closed Sunday.
Google lists the following accessibility features at JJ's Auto Service: wheelchair accessible entrance, wheelchair accessible parking, wheelchair accessible restroom, wheelchair accessible seating.
Verify this station’s license and STAR standing at bar.ca.gov.
Listing updated October 10, 2026.
BAR field office: South El Monte • Licensed since 2016