Alonso's Auto Repair
“The service was great and they did great work on my car I will definitely come back here.”
Best Engine Repair & Rebuild in Upland, CA
18 technicians listed · all 18 in Upland · 6 open weekends · 13 rated 4.5+ · 1 shows a license
Data verified October 16, 2026
Save On Auto Care
“They had the best priced smog coupon, honored it, and were professional and courteous.”
Aamco Transmissions & Total Car Care
“Real smart, helpful and willing to go out of his way for you.”
Accurate Automotive
“Not only was everything reasonably priced, communication was excellent and the quality of work was great.”
G-Tech Automotive
“G-tech always take care of my car they are honest people and good people”
VOW Automotive
“Everyone here took excellent care of my F350 and me.”
Listed for drivers in and around Upland, CA, these 18 shops repair, rebuild and replace engines. What each one says about machine work, warranty terms and the engines it supplies comes from its own website; ratings and quotes come from public reviews.
Area overview: Upland, CA
All 18 technicians we list here are in Upland itself. We have 19 technicians in Upland on file; this page shows the highest-rated 18. The technicians on this page are rated from 4.2 to 5.0 across 1,022 reviews; 6 have 50 or more reviews and 13 are rated 4.5 or higher. The topics that come up most in reviews of the technicians on this page are "price" and "fair". 6 are open on Saturdays and 1 on Sundays. 1 shows a license on its website; 2 list staff certifications (ASE) and 3 have a BBB rating of A or A+. 13 have ten or more years of experience, the longest 47 years. 1 offers financing; 5 are family- or locally-owned and 3 list coupons or special offers. 1 has Spanish-speaking staff. We have a website on file for 11 of the technicians on this page; 7 publish a contact page; 5 list a public email and 3 take bookings online. We count these figures across the technicians on this page; hours and prices change, so confirm the details with the technician before you visit.
Kerber Automotive Repair & Services
“I have been going to him for 15 years and wouldn't take my car to anybody else”
German and Japanese Auto Repair
“They helped me remove some lca bushings and replace with poly in under an hour and thirty minutes.”
Newman Motorsports
“Not only did they address the main issue, but they also took the time to attend to the little extras, ensuring every aspect was in top-notch condition.”
Superior Auto Repair & SEI Smog Testing Specialist
“They are have fast repairs and friendly service”
Whitfield MFG
“I will gladly be going back for more work when I have the money and time and can certainly recommend him to anyone looking to seriously build up their car”
Goodyear
“I went to have the vehicle checked for a leaking head gasket and similar criteria relating to gaskets relating to intake as well .”
GDA Enterprises
“We have had several older cars that Glenn has maintained for us since new and when we finally sold them, we got way over Bluebook for the cars due to the thorough maintenance history Glenn provided.”
J&N Automotive
“Brought my truck in, he knew exactly what was wrong with it immediately and did a diagnostic just to confirm.”
Check Engine Pros
“Check Engine Pros is a fitting name for this company.”
R.G. Engine Performance and Auto Care
“Great service and I was taken care of very well.”
Benri Motor
“Best mechanics I have ever been to and that's saying a lot.”
One Stop Motors
“He's a nice guy who's passionate about his work.”
Why these companies made our list
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