Brake Professional
“We all dread going to the auto repair shop but at least going to Brake Professionals they make your experience as pleasant as possible”
Best Engine Repair & Rebuild in Rancho Cucamonga, CA
15 technicians listed · 9 in Rancho Cucamonga · 2 open 24/7 · 7 open weekends · 13 rated 4.5+
Data verified October 16, 2026
Mobile Mechanic Pros Rancho Cucamonga
“I was pleasantly surprised to discover that they didn't overcharge that customer.”
The Car Guys RC Asian
“Danny, Mohammed the team did timing chain repairs on my GMC Terrain.”
Swap Shop Racing
“There super responsive to there emails provide quality items even some parts for my prelude you can't source.”
Mad Tech Diesel Workz
“Trenton took his time to give me advice on my 2006 F250 with the infamous 6 litre powerstroke.”
The Autoshop
“Al Does a thorough check of the car and writes thorough notes, letting us know how our battery is, tires, tops off fluids and checks how the brakes are doing.”
Listed for drivers in and around Rancho Cucamonga, CA, these 15 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: Rancho Cucamonga, CA
9 of the 15 technicians we list are based in Rancho Cucamonga; the other 6 serve Rancho Cucamonga from Ontario (6 mi), Upland (5 mi) and Fontana (6 mi). The technicians on this page are rated from 3.9 to 5.0 across 2,278 reviews; 9 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", "fair" and "communication". 2 are open around the clock; 7 are open on Saturdays and 2 on Sundays. The services the technicians on this page list most often on their websites are brake repair (3), battery (2), car inspection (2), car maintenance (2) and diagnostics (2). 1 shows a license on its website; 4 list staff certifications (ASE) and 3 have a BBB rating of A or A+. Domain records put 7 websites of the technicians on this page at ten or more years old; the oldest dates from 2002. 2 offer emergency or roadside call-outs; 2 offer financing; 3 are family- or locally-owned and 6 list coupons or special offers. We count these figures across the technicians on this page; distances are straight-line, and hours and prices change, so confirm the details with the technician before you visit.
Why do some listings show another city?
9 of the 15 shops are in Rancho Cucamonga itself and the rest come from other towns within 10 mi. An engine job means leaving the car for days, so the drive happens once at each end rather than every morning.
Green Air Diesel Solutions
“Straight to the point with great customer service.”
Submission Engines
“Carlos does not cut corners but will also help with other solutions when your "pockets aren't deep".”
Rancho Engine Machine
“Had a cast iron exhaust manifold resurfaced here and they did the job promptly and reasonably.”
Mobile Mechanic Pros Ontario
“Needed a detailed Pre-Purchase-Inspection from a reputable mechanic with Mercedes expertise.”
Alonso's Auto Repair
“They diagnosed and repaired a sever oil leak an save me a lot of money.”
Lupe's Auto
“I had a air condition problem and the shop did a great job and getting it up and working again highly recommend it”
Padilla Tire & Auto Repair
“Very friendly fast service honest prices for the things needed for your cars maintance.”
Save On Auto Care
“They were professional and explained clearly the repairs that were needed.”
Rapid Diesel Repair
“They keep you informed on your status of repair and always friendly!”
Why these companies made our list
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