Free Appointment

  1. Free Diagnosis & Brake Checks
  2. Message with your vehicle issue
  3. Expect call from us
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Working time

WEEK DAYS:  7:30 – 5:00


Portsmouth, NH
20 Mirona Road

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Why us?

Welcome to Portsmouth Car Clinic!

Thanks for stopping by our website. We hope you will stop by our shop or make an appointment so we can wow you with our knowledge, technical skill, and outstanding customer service. We appreciate our community and take pride in treating our amazing customers like family. Come see why our customers come back again and again.

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  • Decades of combined experience
  • Free Diagnosis & Brake Checks
  • Stop by or make an appointment
  • Upfront review of tech recommendation
  • Always top quality tools and parts
  • Serving the NH Seacoast for over 20 years
  • Craig White
    Congratulations Brian Hamilton. Brian knows cars and always strives to do what is right for the customer. He takes the time to explain technical issues. Portsmouth Car Clinic is your honest car mechanic in Portsmouth. That means a lot. Write down his number! 603-431-0555
  • Elizabeth Brown
    Would not take my car to any other mechanic, it's so hard to find a good honest mechanic sometimes. Excellent work at Portsmouth Car Clinic!
  • Wilson Richardmarci
    Brian is the best! Honest and reasonable. Been maintaining my RAV4 since I moved to Portsmouth!!!!
  • Katherine Rae
    The expert and the nice guy, Brian Hamilton @ Portsmouth Car Clinic !
  • Rusty Bridle
    Porthsouth Car Clinic (Formally DynaTune Portsmouth) is under new ownership starting 1/1/16 Congratulations to Brian Hamilton for completing a life long dream of owning his own shop. Same great Staff Brian, Steve, Chris & Holly are there to give you that same great service you have come to known. Please like there FB Page stop by and see them



Serving the Seacoast area with NH State Inspections

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Stop by or make an appointment to get your vehicle inspected.


High tech tools to diagnose any vehicle problem.

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We give an honest and upfront assessment of any vehicle issues and work with you to ensure your vehicle is safe and your budget is met.


Looking to make some performance or comfort upgrades?

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From basic replacement to performance upgrades we can make your car run optimally from Kia to BMW.


We can handle all scheduled maintenance needs from oil changes to timing belts.
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Engine Work

Complicated engine work? Not a problem for our skilled technicians.
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Fleet Vehicles

fleet vehicle service

Let us manage all of the maintenance for your fleet vehicles.
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Upgrade your vehicle with new parts; performance, comfort or style.
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All season, sport, or snow… we match your car with the right tire for every situation.
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Get free appointment