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Your Trusted Auto Repair Partner in Portsmouth, NH
At Dow's Automotive Service, we have dedicated ourselves to providing exceptional auto repair solutions for residents of Portsmouth and surrounding areas. Our team of certified mechanics specializes in handling both domestic and import vehicles, offering comprehensive services ranging from routine maintenance to complex repairs. With a focus on efficiency, we complete most services while you wait, ensuring minimal disruption to your schedule.

We prioritize transparency by providing clear, upfront estimates and stand behind our work with a guarantee customers can trust. For over 18 years, our commitment to quality and affordability has made us a trusted choice for vehicle maintenance and repair needs.
Services
AC Repair Brake Service Transmission Flushes Engine Maintenance Tires Electrical Services Electronic Services Suspension Checks Oil Changes Fuel Filter Replacement
Highlights and features
  • Certified mechanics with expertise in all vehicle makes and models
  • Most repairs completed while you wait for convenience
  • Clear, upfront estimates with no hidden costs
  • Specialized services for both domestic and import vehicles
  • 18-year reputation for reliable, affordable auto care
What people say
Excellent work Inexpensive as possible Recommended by friends
Services
AC Repair
Our AC repair service restores optimal climate control in your vehicle. Technicians diagnose refrigerant levels, compressor function, and system integrity. We ensure efficient cooling performance for passenger comfort during hot weather conditions.
Brake Service
Comprehensive brake inspections and repairs maintain stopping power and safety. We replace pads, resurface rotors, and check hydraulic components to ensure reliable braking performance for all vehicle types.
Transmission Flushes
Transmission fluid exchanges extend gearbox longevity. Our process removes contaminants while replacing old fluid with manufacturer-approved lubricants. This service maintains smooth shifting and prevents premature component wear.
Engine Maintenance
Preventive engine maintenance optimizes performance and fuel efficiency. Services include oil changes, filter replacements, and belt inspections. Regular maintenance prevents breakdowns and extends vehicle lifespan.
Tires
Tire rotation, pressure checks, and alignment services maximize tread life. We offer seasonal tire changes and flat repairs while ensuring proper inflation for safety and fuel economy.
Questions
What auto repair services do you offer?
We provide AC repair, brake service, transmission work, engine maintenance, tire services, and electrical system diagnostics for domestic and import vehicles.
Are your mechanics certified?
Yes, our team consists of certified technicians with expertise in all vehicle makes and models for both routine and complex repairs.
Do you offer same-day service?
Most maintenance services complete while you wait. Many repairs like brake work and AC service finish the same day of appointment.
How are repair costs determined?
We provide detailed estimates before work begins. Costs depend on required parts, labor complexity, and vehicle specifications discussed during inspection.
What areas do you service?
We serve Portsmouth, New Castle, Greenland, Stratham, North Hampton, Hampton, Dover, and Newington residents for all auto repair needs.