Alex Auto Diagnostics

No. Alex Auto Diagnostics is not STAR certified. If your DMV renewal notice says "STAR Station Required," you will need to visit a STAR certified station instead.

No. Alex Auto Diagnostics is licensed as a Test & Repair station. This station can run your smog test and, if the vehicle fails, diagnose and repair it in the same shop.

Alex Auto Diagnostics 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 9 PM to 12 AM; Sunday 12 AM to 4 PM. Hours can change on holidays, so call ahead if you are cutting it close.

Yes. Alex Auto Diagnostics accepts walk-ins, so you can drive in without booking ahead.

Alex Auto Diagnostics accepts Credit Card, Debit Card, NFC/Contactless.

Google lists the following accessibility features at Alex Auto Diagnostics: wheelchair accessible entrance, wheelchair accessible parking.

Alex Auto Diagnostics has held a BAR smog license since 2020. You can verify the license status at bar.ca.gov.

Alex Auto Diagnostics 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 (559) 694-2022 for a quote.

Alex Auto Diagnostics does not take online bookings here, but walk-ins are welcome. Call (559) 694-2022 to check the wait.

Staff at Alex Auto Diagnostics speak English.

Bring the car, your registration or DMV renewal notice, and a way to pay. Most smog checks take 15 to 30 minutes, and most visits are closer to 20.

Because Alex Auto Diagnostics is a Test & Repair station, it can diagnose and repair the problem in the same shop, then run the free retest within 30 days. If the repair bill is steep, California's Consumer Assistance Program covers up to $1,200 of emissions repairs for qualifying owners.

The closest alternatives in Firebaugh are Firebaugh Auto Repair (0.4 mi) and Valadez Smog (0.6 mi). Both are listed further up this page with their ratings and hours.