
General Repair
Engine diagnostics, belts, hoses, cooling systems, exhaust, suspension, and everything in between. We work on most makes and models. If we cannot do it here, we will tell you before you drop it off.
Same-day appointments · Honest pricing · ASE-certified mechanics
Independent shop · No upsells · We explain everything
Cornerstone Auto is an independent shop in Southeast Portland. We have been fixing cars since 2003 and we still do it the same way: tell you what is wrong, tell you what it costs, then wait for you to say yes before we start. No surprises on your bill.
We service
What we work on

Engine diagnostics, belts, hoses, cooling systems, exhaust, suspension, and everything in between. We work on most makes and models. If we cannot do it here, we will tell you before you drop it off.

Pad and rotor replacement, brake fluid flush, caliper service, shocks, struts, and wheel bearings. We inspect the whole system and show you the worn parts. You decide what to do.

Oil changes, filter replacements, fluid top-offs, tire rotations, and manufacturer-schedule maintenance. We follow your vehicle's actual schedule, not the old three-thousand-mile rule.

Refrigerant recharge, compressor diagnosis, heater core and blower motor service. We pressure-test before we recharge so you are not back in six months with the same problem.

Check-engine lights, warning lights, drivability issues, and pre-purchase inspections. We read the code, then we find the actual cause. A code points to a system, not necessarily the part.

Family-owned since 2003
Ray and Linda Okafor opened Cornerstone in 2003 with two lifts and a four-car lot. Ray came up through dealerships and spent fifteen years watching customers get charged for work they never agreed to. He wanted to run something different.
The rule from day one: every estimate goes out in writing before a wrench turns. If the job changes once we are inside, we stop and call you. You decide. We do not proceed and apologize later.
Today we have four full bays, seven ASE-certified technicians, and a waiting area that is not embarrassing. Ray still takes road test calls himself on weekday mornings. Linda still reviews every invoice. The rule has not changed in twenty years and we are not planning to change it.
We charge what we quote. We call before we go further. That is the whole business.
Inside the shop






Certified & Backed
From our regulars
“I brought in a car three other shops wanted to replace the transmission on. Cornerstone found a bad sensor. Four hundred dollars and it has been fine for two years. These are the only people I trust with my cars.”
Common questions
Yes, always. We inspect the vehicle, write up what we found, and call you with the total before any work begins. If the job turns out to be different once we are inside, we call you again. We do not proceed without your approval.
We use quality aftermarket parts for most repairs and OEM when the vehicle or repair specifically calls for it. We tell you which we are using and why. If you want OEM, ask us. We can source it.
Parts and labor are warranted for 24 months or 24,000 miles, whichever comes first. Bring it back and we will make it right at no charge.
Most makes and models, yes. We do not do collision repair or major transmission rebuilds in-house, but we will tell you upfront if your vehicle or repair is outside what we handle well.
Absolutely. A pre-purchase inspection takes about an hour. We go over the entire vehicle and give you a written report you can take to the negotiating table. It costs less than one surprise repair.
Cash, check, all major credit and debit cards. We do not charge a card-processing fee. For repairs over $800, we also offer short-term financing through our lending partner. Ask at the front desk.
Ready to come in
We pick up the phone during shop hours. If you need a same-day slot, call us directly. We keep a few open every day for urgent work.
Contact
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