Best Smog Station and Auto Repair
“Very Friendly quick and easy would highly recommend bought on groupon for half price”
Best Coolant & Radiator Flush in National City, CA
15 mechanics listed · 7 in National City · 6 open weekends · 12 rated 4.5+
Data verified October 16, 2026
MCI Auto Repair
“Nate was great and thorough with communication about the parts and prices!”
Total Care Transmissions & Classic Restoration
“I initially contacted them through a form on their site, but I also texted them from my phone and they were very quick to respond.”
Superior Tire Inc.
“Fernando did a great job at figuring out the issue with my car.”
Cool Way Radiator & Air Conditioning
“Radiator flush, swap the fan clutch, and dial in my AC, fair price, honest work.”
Highland Service
“Customer service is great people are friendly feels good pay it forward NATIONAL city san Diego county.”
Listed for drivers in and around National City, CA, these 15 shops list coolant flushes and antifreeze service. What each one says about the coolant types it stocks, machine flushes and warranties comes from its own website; ratings and quotes come from public reviews.
Area overview: National City, CA
7 of the 15 mechanics we list are based in National City; the other 8 serve National City from San Diego (12 mi), Chula Vista (6 mi) and La Mesa (9 mi). The mechanics on this page are rated from 4.3 to 5.0 across 3,769 reviews; 11 have 50 or more reviews and 12 are rated 4.5 or higher. The topics that come up most in reviews of the mechanics on this page are "price", "diagnosis" and "fair". 6 are open on Saturdays and 1 on Sundays. 3 list staff certifications (ASE) and 9 have a BBB rating of A or A+. Domain records put 6 websites of the mechanics on this page at ten or more years old; the oldest dates from 2000. 1 offers financing; 2 give free estimates; 6 are family- or locally-owned and 2 list coupons or special offers. We have a website on file for 11 of the mechanics on this page; 10 publish a contact page; 4 list a public email and 3 take bookings online. We count these figures across the mechanics on this page; distances are straight-line, and hours and prices change, so confirm the details with the mechanic before you visit.
Can I book a coolant change online with shops listed for National City?
Online booking is offered by 3 of the 15 shops. Put your engine and the coolant specification in the notes when you book, since the shop needs the right fluid on the shelf before you arrive rather than a universal jug under the counter.
Advanced Auto Body Group
“The best place to paint cars”
Highland Mobile Auto Service
“All my oil changes are done here”
On Broadway Auto Care Inc.
“On broadway auto care place to go fast honest Maggie an crew helped out alot good info an sevice”
Euro Auto Tech & Smog
“This shop is the best excellent quality of service marvelous customer service.”
Smitty's Service
“I appreciate that they sent me a checklist to review and approve; we spoke at length over the phone before they proceeded.”
Morena Automotive
“They diagnosed the problem and ran tests for several hours to ensure we were weren't putting senior citizens on the road in a dangerous situation.”
Minsky Mercedes
“Jeremy helped me with my Nissan fleet vehicle for 30k maintenance and exceeded all expectations.”
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John's Automotive Care
“Shoutout to Dave for working with me and being super kind and helping me work everything out with my car”
Suspension Plus Automotive Repair
“Jose took care of my alignment on the spot and completed the job without delay.”
Why these companies made our list
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