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Star Smog
“It's hard to find a place who can test a classic vehicle and there were a few hiccups (on my end) but Rudy went above and beyond to help identify the issues so the car would pass.”
Best Car Inspection & Emissions Testing in Walnut Creek, CA
15 stations listed · 13 in Walnut Creek · 7 open weekends · 13 rated 4.5+ · 2 show a license
Data verified October 16, 2026
Roesbery Car Care
“Both headlights went out and Roesbery Care diagnosed the problem and got me back on the road the next day.”
Central Automotive Service Center
“Great service with detailed explanations of services to be provided and explanations of results afterward.”
Gordon's Smog Test & Lube Center
“I called first and was in and out in less than 20 minutes.”
Alignment Services
“My car ended up not having an alignment issue which they shared and did not charge me.”
M Service
“Best car repair option in the region, and worth a drive to get to them if you need a complex problem resolved that no one else can.”
Listed for drivers in and around Walnut Creek, CA, these 15 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.
Area overview: Walnut Creek, CA
Of the 15 stations we list here, 13 are in Walnut Creek itself and 2 come from Concord (5 mi). The stations on this page are rated from 4.3 to 5.0 across 2,530 reviews; 12 have 50 or more reviews and 13 are rated 4.5 or higher. The topics that come up most in reviews of the stations on this page are "price", "communication" and "diagnosis". 7 are open on Saturdays and 2 on Sundays. 2 show a license on their websites; 5 list staff certifications (ASE) and 6 have a BBB rating of A or A+. 13 have ten or more years of experience, the longest 74 years. 1 offers financing; 3 are family- or locally-owned and 9 list coupons or special offers. We have a website on file for 13 of the stations on this page; 9 publish a contact page; 1 lists a public email and 3 take bookings online. 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.
Which shops listed for Walnut Creek test on Saturdays or Sundays?
Weekend testing is on offer at 7 of the 15 shops. Bear in mind that a failure on a Saturday usually waits for parts on Monday, which is an argument for testing midweek if you can.
Oakmont Auto Care
“Customer service is amazing, they actually care about their customers, give am a try, you wont be disappointed”
Auto Diagnostics Repair and Services
“Always keeping me informed of status & they also went above & beyond to also give me the overall report of my vehicle.”
Smog Star Express Walnut Creek
“This might just be the most efficient and well-run business in all of Walnut Creek.”
Walnut Creek Smog
“He not only diagnosed all the mechanical problems the dealership missed, but honestly advised which ones made sense to repair and which didnt!”
Lafayette Auto Repair
“We came in to have our spare tire fixed and they had us out the door in 20min.”
German Autotech
“He was able to find rare parts for my porsche 930.”
Rod's Automotive
“Plus he's a super-nice guy and in my opinion, the last honest mechanic!”
Auto Electric and Fuel LLC
“Michelle was nice and thorough about everything”
Acme Auto Repair
“Great customer service and prices are reasonable, acurate and very fair.”
Why these companies made our list
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