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24 professionals listed · 4 in Diamond Bar · 11 open weekends · 22 rated 4.5+ · 3 show a license
Data verified October 16, 2026
Listed for drivers in and around Diamond Bar, CA, these 24 shops handle general repair work. What each one says about parts, warranties, financing and fleet accounts comes from its own website; ratings and quotes come from public reviews.
Of the 24 professionals we list here, 4 are in Diamond Bar itself and 20 come from towns including Corona (4, 17 mi), Anaheim (3, 11 mi) and Chino (2, 9 mi). The professionals on this page are rated from 4.4 to 5.0 across 4,923 reviews; 22 have 50 or more reviews and 22 are rated 4.5 or higher. When customers rate these professionals on specific qualities, they most often praise professionalism (93%), quality (78%) and value (78%). The topics that come up most in reviews of the professionals on this page are "honest", "communication" and "fair". 11 are open on Saturdays. The services the professionals on this page list most often on their websites are brake repair (3), diagnostics (3), alignments (2), engine repairs (2) and tires (2). 3 show a license on their websites; 5 list staff certifications (ASE) and 20 have a BBB rating of A or A+. Domain records put 14 websites of the professionals on this page at ten or more years old; the oldest dates from 2002. 3 offer financing; 5 give free estimates; 13 are family- or locally-owned and 12 list coupons or special offers. We count these figures across the professionals on this page; distances are straight-line, and hours and prices change, so confirm the details with the professional before you visit.
22 of the 24 shops show ten or more years in business. Longevity is not a guarantee of anything, but a repair shop that keeps the same sign over the same door for that long has generally been settling arguments rather than walking away from them.
- “They were nice enough to inform or recommend I go thru the warranty covered by the dealer, knowing they can lose business but was looking out for what’s best for me and my car.” — customer of Bash Autoworx Porsche
- “Highly recommend! Great communication, actively helped me in being the liaison between me and the car warranty company, great service overall.” — customer of Main Auto Care
- “Their quality of work is professional. They back up the work and parts with a two year warranty.” — customer of Karta Motorwerks
- “Engine rebuilds can be a finicky task and when there were issues, Glendora Import honored their warranty at no cost to me whatsoever, replacing the oil seal and getting me back on the road in no time.” — customer of Glendora Import Specialists
Excerpts from public reviews of the professionals listed on this page.
Brake Pad Replacement Cost: Do You Really Need Rotors?
Can a Mechanic Charge More Than the Estimate? State Rules
Can I Bring My Own Parts to a Mechanic? What It Saves
Car Diagnostic Test Cost 2026: What the Fee Really Buys
Do Mechanics Have to Warranty Their Work? (2026)
Does a Different Mechanic Void Your Car Warranty? (2026)
