Price
Call for price
Hours
Open Mon–Sat
Station type
Test & Repair
Diego's Auto Repair is a test-and-repair smog check station at 12211 Hadley St, Whittier, CA 90601. 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 – 4 PM
- Sunday
- Closed
Hours from public business listings. Call to confirm before you go.
What to expect at Diego's Auto Repair
Diego's Auto Repair can run the inspection and, if your car fails, diagnose and fix it in the same shop. It is not STAR certified, so if your DMV renewal notice says "STAR Station Required" you will need a different station.
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?
- Diego's Auto Repair 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 Diego's Auto Repair?
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12211 Hadley St, Whittier, CA 90601
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 – 4 PM
- Sunday
- Closed
Hours from public business listings. Call to confirm before you go.
Also listed on
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Nearby cities in Los Angeles County
Questions about Diego's Auto Repair
Diego's Auto Repair 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 4 PM. Closed Sunday.
Verify this station’s license and STAR standing at bar.ca.gov.
Listing updated October 4, 2026.
Own this shop? Add photos
BAR field office: South El Monte • Licensed since 2015