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24 stations listed · 20 in Rancho Cucamonga · 1 open 24/7 · 16 open weekends · 19 rated 4.5+
Data verified October 16, 2026
Listed for drivers in and around Rancho Cucamonga, CA, these 24 shops carry out emissions and inspection work. What each one says about its station license, hours and retest policy comes from its own website; ratings and quotes come from public reviews.
Of the 24 stations we list here, 20 are in Rancho Cucamonga itself and 4 come from Pomona (2, 12 mi), Colton (1, 15 mi) and Westminster (1, 36 mi). The stations on this page are rated from 4.1 to 5.0 across 1,909 reviews; 12 have 50 or more reviews and 19 are rated 4.5 or higher. When customers rate these stations on specific qualities, they most often praise professionalism (82%), quality (82%) and value (73%). The topics that come up most in reviews of the stations on this page are "diagnosis" and "honest". 1 is open around the clock; 16 are open on Saturdays and 1 on Sundays. 1 shows a license on its website; 1 lists staff certifications (ASE) and 5 have a BBB rating of A or A+. Domain records put 6 websites of the stations on this page at ten or more years old; the oldest dates from 2009. 1 offers emergency or roadside call-outs; 2 offer financing; 1 is family- or locally-owned and 5 list coupons or special offers. We count these figures across the stations on this page; distances are straight-line, and hours and prices change, so confirm the details with the station before you visit.
3 of the 24 shops here take bookings online. Some stations work on a queue instead, which is fine early in the month and painful at the end of it. If you can book, take the first slot of the day and you will be out before the line forms.
- “The best place for so many years , professional and always so kind with the very best price.” — customer of AA Smog Check Center
- “The prices are very fair and I would highly recommend for anyone in need of a trustworthy mechanic.” — customer of Rancho Smog Center
- “The new owner, Billy, is amazing, from the moment you walk in you feel very comfortable.” — customer of Sam's Smog ️
- “I found this smog testing station on google and was thoroughly impressed with the customer service I received.” — customer of Smog Stop
- “Bill is so nice. He went above and beyond to help me get my truck smogged.” — customer of Sam's Smog ️
Excerpts from public reviews of the stations listed on this page.
