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24 technicians listed · 20 in Ontario · 11 open weekends · 18 rated 4.5+ · 1 shows a license
Of the 24 technicians we list here, 20 are in Ontario itself and 4 come from towns including Upland (1, 6 mi), Fontana (1, 9 mi) and Riverside (1, 14 mi). 23 of the technicians on this page have a rating, from 4.1 to 5.0 across 2,251 reviews; 11 have 50 or more reviews and 18 are rated 4.5 or higher. When customers rate these technicians on specific qualities, they most often praise professionalism (86%), quality (86%) and punctuality (68%). The topics that come up most in reviews of the technicians on this page are "price", "honest" and "warranty". 11 are open on Saturdays and 1 on Sundays. 1 shows a license on its website; 1 lists staff certifications (ASE) and 10 have a BBB rating of A or A+. Domain records put 9 websites of the technicians on this page at ten or more years old; the oldest dates from 2000. 1 offers financing; 4 give free estimates; 1 is family- or locally-owned and 5 list coupons or special offers. 1 has Spanish-speaking staff. 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.
Data verified October 9, 2026
Listed for drivers in and around Ontario, CA, these 24 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.
20 of the 24 shops are in Ontario itself and the rest come from other towns within 20 mi, shown with their own city. An engine job means leaving the car for days, so the drive happens once at each end rather than every morning.
