4A Auto Diagnostics and Repair
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24 stations listed · 4 in Johns Creek · 9 open weekends · 21 rated 4.5+ · 1 shows a license
Data verified October 16, 2026
Listed for drivers in and around Johns Creek, GA, 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, 4 are in Johns Creek itself and 20 come from towns including Alpharetta (4, 5 mi), Roswell (3, 9 mi) and Lawrenceville (3, 13 mi). The stations on this page are rated from 4.0 to 5.0 across 6,029 reviews; 23 have 50 or more reviews and 21 are rated 4.5 or higher. When customers rate these stations on specific qualities, they most often praise professionalism (90%), quality (76%) and value (68%). 9 are open on Saturdays and 1 on Sundays. The services the stations on this page list most often on their websites are brake repair (4), oil change (4), air conditioning (3), auto repair (3) and check engine light (3). 1 shows a license on its website; 3 list staff certifications (ASE) and 10 have a BBB rating of A or A+. Domain records put 13 websites of the stations on this page at ten or more years old; the oldest dates from 2002. 4 offer financing; 2 give free estimates; 5 are family- or locally-owned and 10 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.
5 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.