Our Auto Maintenance and Repair Services
At Stonum Automotive, we provide comprehensive auto maintenance and repair services to keep your vehicle running smoothly. As a trusted auto repair shop in Longmont, CO, we offer everything from routine vehicle servicing and maintenance to complex repairs. Whether you need an oil change, brake service, or engine diagnostics, our expert mechanics are here to help. Explore our full range of services below.
Auto Repair Services
Our skilled technicians diagnose and repair mechanical issues for all makes and models. From minor fixes to major repairs, we ensure your vehicle stays road-ready. Our services include engine diagnostics, exhaust system repairs, suspension fixes, transmission overhauls, and electrical system troubleshooting.
Auto Maintenance Services
Regular auto maintenance services help extend your vehicle’s lifespan. We provide oil changes, tire rotations, brake inspections, fluid checks, timing belt replacements, and coolant system maintenance to keep your car in peak condition. Routine maintenance ensures better fuel efficiency, prevents costly repairs, and improves overall vehicle safety.
Auto AC Heating Service & Repair
Stay comfortable year-round with our AC and heating repair services. Whether your air conditioner isn’t cooling, your heater isn’t warming, or you notice unusual noises, our team diagnoses and repairs the issue. We handle compressor replacements, refrigerant refills, heater core repairs, and vent diagnostics.
Wheel Alignment Service
Proper wheel alignment improves handling, extends tire life, and enhances fuel efficiency. We provide precision alignments to ensure smooth and safe driving. Misaligned wheels can cause uneven tire wear and poor vehicle stability, so regular alignment checks are essential.
Filter Replacement
Filters keep your vehicle’s engine and air systems clean. We replace all types of filters, including:
- Engine Air Filter
- Cabin Air Filter
- Transmission Filter
- Fuel Filter
- Oil Filter
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EV, Electric, Hybrid Repair and Service
As electric and hybrid vehicles become more common on the road, finding qualified service you can trust is essential. At Stonum Automotive, we specialize in EV maintenance and hybrid car repair in Longmont, Colorado. Our certified technicians are trained in the latest technology to ensure your vehicle receives the expert care it deserves—keeping you powered up, efficient, and safely on the road.
Battery Replacement
A failing battery can leave you stranded. We test and replace batteries to keep your car starting reliably. Our battery services include charging system checks, corrosion cleaning, terminal replacements, and voltage testing.
Tire Repair
If you have a flat tire or a slow leak, our team can inspect, patch, or replace your tires as needed. Safe tires mean better traction and fuel efficiency.
Brake Repair & Replacement
Brakes are one of the most critical safety components in your vehicle. We offer brake inspections, repairs, and full replacements, including brake pad changes, rotor resurfacing, fluid replacements, and anti-lock braking system (ABS) diagnostics to ensure optimal stopping power.
Auto Electrical Services
We diagnose and fix electrical system issues, including battery problems, alternator failures, starter malfunctions, dashboard warning lights, and wiring repairs to keep your vehicle operating efficiently.
Auto Electronic Service
Modern vehicles rely on electronic systems for performance and safety. Our technicians troubleshoot and repair dashboard electronics, engine control modules, parking sensors, infotainment systems, and power windows.
Oil Change
We use high-quality oil and filters to maintain optimal performance, extend engine life, and reduce wear and tear on vital components.
Undercar Services
We inspect and service components like axles, differentials, and exhaust systems to maintain structural integrity and performance.
Distributorless Ignition Repair
Our mechanics repair distributorless ignition systems, ensuring your engine starts and runs efficiently. This includes coil pack replacements, ignition control module diagnostics, and spark output testing.
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Ignition System Repair
From faulty ignitions to worn-out components, we diagnose and repair ignition system issues. Our services include ignition coil replacements, key programming, and ignition switch diagnostics.
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Ignition Wires & Cables Repair
We replace worn components for reliable engine operation, ensuring smooth acceleration and efficient combustion.
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Spark Plug Change
New spark plugs improve fuel efficiency, reduce emissions, and enhance engine performance. Our team replaces spark plugs to maintain consistent engine performance and better fuel economy.
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Fuel Injection Maintenance
We clean and maintain fuel injectors to optimize fuel delivery, ensuring better performance and fuel economy.
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Fuel Pump Replacement
If your fuel pump is failing, we offer fuel pump replacement to restore proper fuel flow to your engine. This service includes fuel line inspections and pressure regulator checks.
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Radiator Repairs
A failing radiator can lead to engine overheating. We repair and replace radiators, coolant hoses, water pumps, and thermostats to keep your engine at the right temperature.
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Steering Suspension Repairs
We diagnose and repair steering and suspension issues, improving handling, ride comfort, and overall vehicle stability. This includes shock absorbers, control arms, tie rods, and power steering systems.
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Wiper Blades
Clear visibility is essential for safety. We inspect and replace wiper blades to ensure your windshield stays streak-free in all weather conditions.
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Engine and Transmission Services
From engine maintenance and repair to transmission rebuilds and timing belt replacements, we handle all aspects of engine and transmission care. Our services include cylinder head repairs, clutch adjustments, and drivetrain diagnostics.
Miscellaneous Auto Services
We offer specialized services, including:
- Trailer hitches, wiring, and tires
- Fleet vehicle services
Find Our Longmont Auto Repair Shop & Maintenance Center
Conveniently located at 1812 Sunset Place, Longmont, CO 80501, Stonum Automotive is your trusted car repair center. Whether you need routine vehicle servicing and maintenance or emergency repairs, we’re here to help.
Hours: Monday – Friday: 8:00 AM – 5:00 PM
Schedule an Appointment
Don’t wait until a small problem becomes a major repair. Call 303-485-9303 or schedule an appointment online today with Stonum Automotive, your go-to auto repair shop in Longmont, CO!