JBS Auto Service
“The owner (Travis) and his mechanics are kind and knowledgeable and spent a lot of time explaining the issues with my car and my various options to get it fixed.”
Best Coolant & Radiator Flush in Simi Valley, CA
15 mechanics listed · 12 in Simi Valley · 4 open weekends · all 15 rated 4.5+ · 2 show a license
Data verified October 16, 2026
Bj's Automotive
“They always do a thorough job checking everything and getting the car back as soon as possible, as well as letting me know if any problems are covered by dealership warranties/ recalls.”
Schneider's Automotive
“They talk to me like a person, don't try to nickel and dime clients, and are great about communication and timeliness.”
Perry's Quality Auto Repair Shop & Mechanic
“Some of the friendliest and more knowledgeable auto mechanics you could ever meet!”
Bill's Quality Auto Care
“They have done such a great job for me with all my cars and usually have it done by end of day the day I drop it off”
Oil Changers
“From the Service Tech's to wonderful Customer service support people who helped me when I had an issue Great Co.”
Listed for drivers in and around Simi Valley, 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: Simi Valley, CA
12 of the 15 mechanics we list are based in Simi Valley; the other 3 serve Simi Valley from Thousand Oaks (9 mi) and Westlake Village (10 mi). The mechanics on this page are rated from 4.6 to 5.0 across 5,136 reviews; 14 have 50 or more reviews. When customers rate these mechanics on specific qualities, they most often praise quality (95%), professionalism (86%) and value (81%). The topics that come up most in reviews of the mechanics on this page are "diagnosis", "fair" and "communication". 4 are open on Saturdays and 2 on Sundays. The services the mechanics on this page list most often on their websites are brake repair (2), car wash (2), clutch repair (2), oil change & fluid services (2) and state inspections (2). 2 show a license on their websites; 3 list staff certifications (ASE) and 8 have a BBB rating of A or A+. Domain records put 13 websites of the mechanics on this page at ten or more years old; the oldest dates from 2002. 5 offer financing; 4 are family- or locally-owned and 9 list coupons or special offers. 1 has Spanish-speaking staff. 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 Simi Valley?
Online booking is offered by 5 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.
Oil Changers
“The guys topped off my oil and recommended a heavier weight oil than I had been using in order to help need less frequent topping off.”
The German Auto Doctor
“You want your car fix right, take it to German Auto.”
Simi Lube & Oil
“Don't even need to get out of the car for a full service oil change.”
A & D Automotive Inc
“I've been bringing my car in for service for over 20 years & have always been satisfied with their work.”
German Auto Specialist
“Had me in and out in ten minutes and I was just a walk in.”
Mike Willard Automotive
“Pat actually encourages you to get to know your car and work on it yourself if you can”
Westlake Independent Automotive
“This was my first ever car service experience in the US, I have found them through searching auto service centers around in the Google and to be honest, they definitely deserve this 5 star!”
Preferred Auto Centre
“Excellent, very fast and professional service.”
Gallardo's Automotive Service Inc
“Helpful, efficient, friendly, and competitively priced.”
Why these companies made our list
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