Z Smog Check

Smog inspection station

4.8 4.8 from 123 reviews

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Z Smog Check is a smog and emissions station in Upland, CA. It holds a 4.8 star rating from 123 customer reviews. Read the reviews and hours below, or call (909) 949-6930.

Photo from zsmog.com, this business's own website.

Services Offered

Emissions testingOut-of-stateSmog certificationAll Dmv Smog InspectionAny Auto RepairsAuto RepairsAutomotive RepairsBiennial Smog CheckBiennial Smog InspectionCar Smog CheckCertification Smog checkCertified Smog CheckCertified Smog TestChange Of Ownership Smog TestCoupon Smog CheckDMV Smog Checks

As listed on its Google Business Profile. Own it? Claim the listing to set your own list.

Address1290 W 9th St, Upland, CA 91786

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Phone(909) 949-6930

Websitehttps://www.zsmog.com/

Also onGoogle

Good to knowWheelchair accessible entranceWheelchair accessible parking

PaymentsCredit cards, Debit cards, Tap to pay

Hours

See the full week

Monday	9 AM to 5:30 PM
Tuesday	9 AM to 5:30 PM
Wednesday	9 AM to 5:30 PM
Thursday	9 AM to 5:30 PM
Friday	9 AM to 5:30 PM
Saturday	9 AM to 3 PM
Sunday	Closed

Z Smog Check Reviews & Ratings

Customer reviews 4.8 4.8 · 123 reviewschecked 2026-09-12

5 star114

4 star3

3 star1

2 star1

1 star4

What Customers Mention

The topics that come up most in its Google reviews, and how many reviews raise each one.

Friendly staff 21Smog check 17Honesty 4Waiting area 4Awesome experience 3Easy process 3Friendly owner 3Short wait times 3

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What Car Repairs Cost in Upland, CA

Typical independent shop prices at California labor rates, parts and labor, for a midsize car. Each guide shows the price for your vehicle and what to ask before you pay. See all 91 repair cost guides.

Catalytic converter replacement cost $420 to $1,750 Oxygen sensor replacement cost $120 to $510 EVAP leak repair cost $140 to $740 EGR valve replacement cost $210 to $840 Purge valve replacement cost $110 to $460 Exhaust leak repair cost $150 to $690