Dealer-level expertise.
A mechanic you actually know,
at a price you'll actually like.

Independent automotive service and repair honoring the legacy of Der Wagen Haus and continuing to serve its valued customers. Cornerstone Garage specializes in Honda and Acura vehicles while also servicing Japanese and other select import makes and models. Work is performed by an ASE Certified technician with nearly 20 years of experience specializing in Honda and Acura vehicles.

ASE Certified Automotive Technician

ASE Certified
Honda & Acura Specialist
Owner-Operated
1904 Spring Garden St.
About Justin

Back where it all started.

Justin Schlossberg, owner of Cornerstone Garage Service and Repair
Justin SchlossbergOwner & ASE Certified Technician

I'm Justin Schlossberg, and my career in automotive repair began in 2005 when I enrolled in the Automotive Systems Technology program at Guilford Technical Community College. While working toward my associate degree, I began working as a young technician at Der Wagen Haus, gaining hands-on experience in the trade while completing my education.

After earning my degree, I spent nearly 20 years at an independent Honda and Acura repair facility in Greensboro, eventually serving as Shop Manager and gaining experience in nearly every area of the business.

Now, I'm honored to return to Der Wagen Haus and build on what Alan started more than 40 years ago. There's something pretty special about coming back to the same shop where my career began — this time as the owner.

My wife, Ashley, and I have been blessed with two boys, Camden and Nolan, and we're proud to call the Greensboro area home. When I'm not at the shop, you'll usually find me spending time with my family, serving at our church, coaching baseball, or lifting weights.

For me, automotive repair has always been about more than fixing cars. It's about taking care of people. I want my customers to have a mechanic they know, trust, and feel comfortable calling when something goes wrong.

"My goal is simple: do quality work, treat people fairly, and build relationships that last."
Justin Schlossberg
Justin with his wife Ashley and sons Camden and Nolan
The Schlossberg family — Justin, Ashley, Camden & Nolan

ASE Certified

Nationally certified technician with the training to back every repair.

Honda & Acura Specialist

Nearly 20 years focused on these vehicles, from Civic to MDX.

Honest Estimates

Clear pricing and straight answers before any work begins.

Talk to the Owner

The person who works on your car answers the phone.

What We Do

Complete Automotive Service & Repair

Honda and Acura are our specialty, but they're not all we work on. Cornerstone Garage proudly continues the tradition of quality service established by Der Wagen Haus while welcoming its existing customer base and new customers alike. We will also service Japanese and other select import makes and models.

Factory-Scheduled Maintenance

Mileage-based services, fluid maintenance, filters, spark plugs, valve adjustments, timing belt services and more.

Oil & Filter Services

Conventional or full synthetic as applicable, with maintenance reset and a general vehicle inspection.

Advanced Diagnostics

Check-engine lights, warning lights, drivability concerns, misfires, starting and charging issues and difficult-to-diagnose problems.

Electrical Diagnostics & Repair

Batteries, alternators, starters, wiring, parasitic draws, switches, sensors and electrical accessories.

Brake Service & Repair

Pads, rotors, calipers, hydraulic repairs, brake-fluid service and ABS/VSA diagnosis.

Steering & Suspension

Struts, shocks, control arms, ball joints, tie rods, wheel bearings and related repairs.

Heating & Air Conditioning

A/C diagnosis and repair, refrigerant service, compressors, condensers, evaporators, blower motors and heating concerns.

Cooling System Service & Repair

Radiators, water pumps, thermostats, hoses, cooling fans and coolant service.

Engine Repair

Oil leaks, valve-cover gaskets, mounts, timing components, cylinder-head related repairs and other mechanical engine repairs.

Transmission & Drivetrain

Transmission fluid service, CVT/DCT service where applicable, differentials, transfer cases, axles and related drivetrain repairs.

Fuel & Ignition Systems

Fuel injectors, pumps, ignition coils, spark plugs and fuel-system diagnosis.

Timing Belt & Water Pump

Complete timing belt and water pump service — especially Honda and Acura V6 applications.

Tire Service

Balancing, rotations, TPMS diagnosis and repair, and flat repair.

NC Safety & Emissions Inspections

State inspections coming soon — available once our inspection station setup is active.

Pre-Purchase & General Inspections

Overall mechanical and safety-condition assessments before you buy, or whenever you want a clear picture of your vehicle.

Request Service

Request an Appointment

Tell us about your vehicle and what it needs. Justin will follow up to confirm a time.

Takes about a minute — opens a quick request form. Prefer to talk? Call (336) 274-7800 or text (336) 974-8157.