Seattle's Most Trusted Name in Auto Repair


We're down to earth, no nonsense technicians with a passion for quality automobile care. We'll take the time needed to communicate our service recommendations for your car in words everyone can understand. Our 60 years of experience means no one knows better the keys to maintaining the peak performance and longevity of your car.

ASE Certified Technicians

  • Cadillac
  • Honda
  • Subaru
  • Mazda
  • Lexus
  • Dodge
  • Mercedes-Benz
  • Toyota
  • Acura
  • Nissan
  • Volvo
  • Buick
  • Fiat
  • GMC
  • Mitsubishi
  • Hyundai
  • BMW
  • Infiniti
  • Suzuki
  • Jaguar
  • Kia
  • Land Rover
  • Mini
  • Chevrolet
  • Ford
  • Jeep
  • Chrysler
  • Volkswagen
  • Audi

Technology in modern vehicles is changing in leaps and bounds. Our technicians maintain their ASE Certification to provide your ride with optimum service at any age. We use our state-of-the-art equipment to precisely diagnose the status of your car. We're authorized to perform extended warranty repair for all major auto manufacturers.

ASE CertifiedAAA Approved Auto Repair

Duramax and Powerstroke Diesel Repair


We specialize diesel repair services for Chevy Duramax Diesel, Ford PowerStrokes, and Dodge Cummins. All diesel repairs and maintenance services are performed by highly trained, certified technicians.

Duramax DieselFord Powerstroke Diesel

Your Electric and Hybrid Vehicle Headquarters


We are trained and qualified in safety, diagnostics, testing and maintenance of hybrid and electric vehicles. We'd be happy to provide battery testing, balancing, reconditioning or replacement to increase the life of your vehicle.

Family owned and operated since 1956


Our technicians are family, and so are our customers. Maddy's Automotive was founded in 1956 by Howard and Betty Maddy in the Shoreline neighborhood of Seattle. Their vision for providing the Pacific NW with the highest quality auto care has been passed down through three generations of the Maddy family. They've continued to own and operate our service center for over 60 years.

Schedule your Appointment Today!


Call now! We'd love to help you with your car concerns. There's no better time than the present to get the most out of your vehicle by keeping it in tip-top shape. You'll be pleasantly surprised how easy it is to get your car fixed with us. We're conveniently located right on Highway 99 in the heart of the north Seattle auto area.
Make an Appointment now  

Check Engine Light?

Let us put your mind at ease! We'll get to the bottom of that blinking light or funny noise in a flash. We use the very latest technology with our 60 years of experience to diagnose all your auto service needs.

Warranty Service

We're authorized to perform factory scheduled maintenance for all major auto brands. We'll make sure your car performs at it's best through 30, 60, 90 and 120k mile services. We're also certified to perform DMV and State Emission inspections & repairs.

Standard Maintenance

  • Check Engine Light Diagnostics
  • 30/60/90/120 Mile Services
  • Oil Changes
  • Tune Ups
  • Filter Replacements
  • Factory Scheduled Maintenance
  • State Emission Inspections and Repair

Braking and Handling

  • Brake Repair
  • Antilock Braking System (ABS) Repair
  • Shocks & Struts
  • Suspension Repair
  • Power Steering Service & Repair


  • Transmission Service & Repair
  • Transmission Replacement
  • Clutch Repair
  • Differential Service & Repair
  • Transmission Flush
  • Axle Repair

Engine Services

  • Engine Service & Repair
  • Engine Replacement
  • Radiator Repair & Replacement
  • Water Pump Repair & Replacement
  • Ignition System Service & Repair
  • Fuel System Service & Repair

Heating & Air Conditioning

  • Air Conditioning Service & Repair
  • Heating Service & Repair
  • Belt Replacement
  • Refrigerant Service
  • Compressor & Evaporator Repair


  • Electrical System Diagnostics & Repair
  • Starter Repair & Replacement
  • Power Lock Repair
  • Alternator Service & Repair
  • Power Window Repair
  • Light Repair & Replacement

Exhaust System

  • Exhaust Testing & Repair
  • Muffler Repair & Replacement
  • Catalytic Converter Repair
  • Exhaust Manifold Repair

Hybrid Services

  • Battery Health Testing & Conditioning
  • High Voltage Cable Inspection & Repair
  • Regenerative Braking Service
  • Factory Scheduled Maintenance

... and many more!

Request Service

Use this form to contact us for service. Please tell us about your vehicle's symptoms or services needed.

Contact Details

Please fill out a good time to drop off your vehicle and how we can get in touch with you about your appointment. We'll be happy to diagnose and service your vehicle right away.

Sending Request
Success! Thanks for contacting Maddy's Automotive

Service Hours

9:00AM - 5:30PM
9:00AM - 5:30PM
9:00AM - 5:30PM
9:00AM - 5:30PM
9:00AM - 5:30PM

Closed Saturday and Sunday

Maddy's Automotive
15205 Aurora Ave N.
Shoreline, WA 98133

Call us now 206-364-3347
Maddy's Automotive
Phone: 206-364-3347
cash, credit card
15205 Aurora Ave N.
Shoreline, WA 98133