Complete Auto Repair in Mesa, AZ 85210
Looking for a mechanic in Mesa you can trust? SHM Motorsports LLC — formerly Shell Happy Auto Accessories — is a family owned auto repair shop founded in 1984 and serving Mesa from the same Extension Road location since 1992. From oil changes, brakes and tune-ups to radiators, timing chains, fuel pumps, struts, engine and transmission repair — we do it all for cars, trucks, SUVs and 4x4s, under one roof. Hablamos Español.
Everything Your Car or Truck Needs
One shop for your whole vehicle — no driving to three different places. Here's what we service every day in Mesa:
Oil Changes & Maintenance
Oil changes with 100% new motor oil (never recycled), filters, tune-ups, spark plugs, fluid services, belts, hoses and scheduled maintenance.
Brakes
Brake inspections, pads, rotors, calipers, brake fluid and complete brake-system diagnosis — including ABS diagnostics and brake electronics.
Engine Repair
Engine diagnostics and repair, timing belts and timing chains, head gaskets, cylinder-head work, oil and coolant leaks, motor mounts, and engine replacement.
Radiators & Cooling System
Radiators, radiator flushes, coolant service, water pumps, thermostats, cooling fans, coolant leaks and overheating diagnosis.
Fuel System
Fuel pumps, fuel-system diagnosis and components, plus fuel-injection related diagnosis for drivability and no-start problems.
Suspension & Steering
Struts, shocks, control arms, ball joints, tie rods, power steering, suspension diagnosis and 3D computerized wheel alignment.
Transmission & Drivetrain
Transmission diagnosis, service, repair and replacement — plus CV axles, differentials, driveshafts, wheel bearings, transfer cases and 4x4 drivetrain repair.
A/C & Heating
A/C diagnostics, recharge, leak detection, compressors, condensers, evaporators, heater systems and heater-core replacement — Arizona heat ready.
Electrical & Diagnostics
Check-engine lights, computer and electrical diagnostics, no-start conditions, batteries, alternators, starters, ignition switches and ECU/ECM service.
Door & Window Hardware
Power window regulators and motors, door lock actuators, latches, handles and related electrical repairs.
Leaks, Noises & Warning Lights
Oil, coolant, transmission and exhaust leaks, vacuum leaks, rear main seals, valve covers — plus check engine lights and dashboard warning codes.
Safety & Airbag Systems
Airbag (SRS) lights and sensors, seatbelt sensors, collision sensors, traction and stability control — diagnosed and repaired.
The Complete List — 210+ Auto Repair Services
If it's related to auto repair, we do it. Here's the full list of services we handle for cars, trucks, SUVs and 4x4s:
Engine Repair & Rebuilding
- Engine diagnostics
- Engine repair
- Engine replacement
- Engine rebuilds
- Engine swaps
- Head gaskets
- Cylinder head repair
- Valve jobs
- Timing chains
- Timing belts
- Oil leak repair
- Coolant leak repair
- Motor mounts
- Main seals
- Rear main seal replacement
- Valve cover gaskets
- Valve cover replacement
- Oil pan repair
- Cam & crank seals
- Timing cover gaskets
Oil Changes & Routine Maintenance
- Oil changes with 100% new motor oil
- Oil filters
- Tune-ups
- Spark plugs
- Spark plug wires
- Ignition coils
- Coil pack replacement
- Engine air filters
- Cabin air filters
- Fuel filters
- Transmission fluid service
- Brake fluid flush
- Coolant flush
- Power steering fluid
- Differential fluid
- Scheduled factory maintenance
Belts & Hoses
- Serpentine belts
- Timing belt replacement
- V-belts
- Belt tensioners
- Idler pulleys
- Radiator hoses
- Heater hoses
- Vacuum hoses
- Hose replacement
- Belt squeal diagnosis
Brakes
- Brake pads
- Brake rotors
- Brake drums
- Calipers
- Master cylinders
- Brake lines
- Wheel cylinders
- Brake fluid service
- Emergency / parking brake
- ABS diagnostics
- Brake inspections
- Brake noise diagnosis
Steering & Suspension
- Struts
- Shocks
- Coil springs
- Leaf springs
- Control arms
- Ball joints
- Tie rods
- Sway bar links
- Bushings
- Steering racks
- Steering gearboxes
- Power steering pumps
- Steering column & shaft repair
- Wheel bearings
- Hub assemblies
- Suspension diagnosis
- 3D computerized wheel alignment
- Air suspension (air ride) repair
- Air suspension compressors & bags
Transmission & Clutch
- Transmission diagnosis
- Automatic transmission service
- Transmission repair
- Transmission replacement
- Transmission leak repair
- Transmission pan gaskets
- Clutch replacement
- Flywheel resurfacing
- CV axles
- Axle seals
- Driveshafts
- U-joints
- Differentials
- Differential repair & rebuild
- Differential leak repair
- Transfer cases
- 4x4 drivetrain repair
4x4, AWD & Drivetrain
- 4x4 system diagnosis & repair
- All-wheel drive (AWD) system repair
- Transfer case repair & rebuild
- Transfer case fluid service
- Differential rebuilds
- Locking hubs
- Driveshaft repair & balancing
- 4wd engagement problems
- Front axle & hub service
Radiators & Cooling System
- Radiator replacement
- Radiator repair
- Radiator flush
- Water pumps
- Thermostats
- Cooling fans
- Electric fan repair
- Fan clutches
- Coolant leaks
- Overheating diagnosis
- Overflow tanks & reservoirs
- Radiator cap & pressure testing
- Coolant temperature sensors
Fuel System & Fuel Injection
- Fuel pumps
- Fuel injector service
- Fuel filters
- Fuel lines
- Fuel tanks
- Fuel pressure testing
- Throttle body service
- Fuel-injection diagnosis
- Throttle position sensors
- Idle air control valves
- No-start fuel system diagnosis
A/C & Heating
- A/C diagnostics
- A/C recharge
- Compressor replacement
- Compressor clutch repair
- Condensers
- Evaporators
- Expansion valves
- A/C leak detection
- Blower motors
- Blend door actuators
- Heater cores
- Heater systems
- Defroster repair
Electrical & Charging
- Batteries
- Alternators
- Starters
- Ignition switches
- Wiring repair
- Wiring harness & ground repair
- Battery drain diagnosis
- Relays & fuses
- Power windows
- Power door locks
- Power seats
- Keyless entry & remotes
- Dashboard warning lights
- Headlights & taillights
- Trailer wiring
- ECU / ECM / PCM diagnostics
- Body control module (BCM) diagnostics
SRS & Safety Systems
- Airbag (SRS) light diagnosis
- Airbag sensor replacement
- Seatbelt sensor repair
- Collision sensor diagnosis
- Clock spring replacement
- Traction & stability control light repair
Diagnostics & Drivability
- Check engine light diagnosis
- OBD-II check engine code scanning
- Check engine code repair
- Sensor replacements (O2, MAF, MAP, cam & crank)
- No-start diagnosis
- Stalling diagnosis
- Rough idle
- Engine misfires
- Vacuum leak diagnosis & repair
- Poor gas mileage diagnosis
- Computer diagnostics
- Drivability troubleshooting
- Pre-purchase inspections
- Second opinions
- Intermittent problem diagnosis
Exhaust & Emissions
- Mufflers
- Exhaust pipes
- Resonators
- Catalytic converter replacement
- Catalytic converter problems
- O2 sensors
- Exhaust manifolds
- Exhaust manifold gaskets
- Exhaust leak repair
- Flex pipe replacement
- Heat shield repair
- Y-pipes
- EGR valves
- EVAP system diagnosis
- EVAP leak repair
- Emissions & smog failure repair
Tires, Wheels & Alignment
- Tire mounting
- Computerized balancing
- Flat tire repair
- Tire rotation
- TPMS sensors
- Wheel alignment
- Lug stud replacement
- Tire pressure checks
Wipers, Glass, Sunroofs & Hardware
- Wiper blades
- Wiper motors
- Windshield washer pumps
- Horn repair
- Door handles & latches
- Bulb replacement
- 12V power outlets
- Window regulators
- Door lock actuators
- Sunroof repair
- Sunroof motors & tracks
- Sunroof leak repair
Why Mesa Drivers Choose SHM
Family Owned Since 1984
Over 40 years in business, at the same Mesa location since 1992. Formerly Shell Happy Auto Accessories — same family, same shop.
All Makes & Models
Cars, trucks, SUVs and 4x4s — domestic and import. We work with extended warranty companies and install customer-supplied parts where applicable.
Complete Diagnostics
Computer, electrical and mechanical troubleshooting — check-engine lights, drivability problems and hard-to-find issues.
Financing Available on Auto Repairs
Car trouble can't wait? Shop Now, Pay Later — All Credit Types Welcome Here! Lease-to-own financing is available for up to 100% of qualifying repair costs, subject to approval — all credit types welcome. Apply online with any of our partners:
Common Questions
What auto repair services do you offer?
Complete auto repair for cars, trucks, SUVs and 4x4s: engine repair and rebuilding, timing chains, head gaskets, oil leaks, transmission repair, differentials, transfer cases, 4x4 and all-wheel-drive repair, brakes, struts and shocks, radiators and cooling systems, fuel pumps and fuel injection, A/C and heating, electrical work, airbag and safety systems, exhaust and catalytic converters, emissions repair, sunroofs, and full computer and check-engine-light diagnostics. If it's related to auto repair, we do it.
Do you offer financing on auto repairs?
Yes. SHM Motorsports works with Acima Finance, American First Finance, Koalafi Finance, Progressive Finance, Easy Pay Finance — lease-to-own financing is available for up to 100% of qualifying repair costs, subject to approval. Apply online or contact us for details.
Do you work with extended warranty companies?
Yes. SHM Motorsports works with extended-warranty companies for covered auto repairs. Have an extended warranty? Contact us and we'll help you with the repair process.
Can I bring my own parts?
Yes. Bring your own parts and our team can handle the installation on qualifying repair and installation services.
Do you work on trucks, SUVs and 4x4s?
Yes. We provide complete auto care for cars, trucks, SUVs and 4x4s — from routine maintenance and diagnostics to major mechanical repairs, including 4x4 drivetrain repair and transfer cases.
Visit the Shop
452 South Extension Road, Suites 2 & 3
Mesa, AZ 85210
- Monday – Friday: 9:00 AM – 6:00 PM
- Saturday – Sunday: Closed
Shop Now, Pay Later — All Credit Types Welcome Here!
Lease-to-Own Financing!