32+ years of Blue Seal diagnostic experience

Expert Auto Repair & Diagnostics in Columbus, OH

32+ years of master diagnostic experience. Get honest, root-cause answers and upfront pricing before any work begins

$99 + tax diagnostic fee credited toward qualifying same-day repairs

  • Columbus, OH
  • Reynoldsburg, OH
  • Whitehall, OH
  • Bexley, OH
  • Gahanna, OH
  • Groveport, OH
  • Pickerington, OH
  • Upper Arlington, OH
  • Worthington, OH
  • Columbus, OH
  • Reynoldsburg, OH
  • Whitehall, OH
  • Bexley, OH
  • Gahanna, OH
  • Groveport, OH
  • Pickerington, OH
  • Upper Arlington, OH
  • Worthington, OH

Start with a conversation

Request an automotive consultation

Give Derrick a little context first. He can review your concern, explain the next step, and arrange a focused Google Meet consultation when it is useful.

  1. 01

    Describe the symptoms

    Tell us what the vehicle is doing, when it started, and which warning lights are on.

  2. 02

    Share vehicle details

    Include the year, make, model, and optional VIN so Derrick can prepare for the conversation.

  3. 03

    Meet with context

    Request a consultation first, then use Google Meet when you and Derrick are ready to talk.

Owner-operated since 2015

An automotive doctor, not a parts swapper

Derrick M., owner of Speedy Underhood Service and Blue Seal master mechanic

Derrick M. is a Blue Seal master mechanic with 32+ years of hands-on diagnostic experience. He reads live sensor data, tests circuits, and proves the root cause before recommending a single repair.

You get a written estimate first, flat-rate labor, and a plain-English explanation of what your vehicle actually needs.

What we repair

Diagnostic & mechanical services

Precision repair for every underhood system — in-shop or mobile.

Handheld OBD-II diagnostic scan tool plugged into a car's under-dash diagnostic port during a check engine light diagnosis in Columbus, Ohio

Automotive Diagnostics & General Auto Repair

Our primary service — the diagnostic checkout that every accurate repair starts with.

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Torque wrench tightening a brake caliper bolt beside a new vented brake rotor during a brake pad and rotor replacement on a vehicle lift

Brakes & Traction Control

Stopping power, pedal feel, and ABS traction systems restored to factory specification.

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Mechanic holding a digital multimeter in one hand and a red test probe in the other while checking an automotive electrical connector in an engine bay

Diagnostics

Root-cause testing for check engine lights, no-starts, leaks, and electrical gremlins.

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Cooling system pressure tester gauge attached to a radiator filler neck to locate a coolant leak during engine cooling system service

Engine, Cooling & Exhaust

Underhood mechanical work from cooling and charging systems to full engine and transmission swaps.

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Cup-style oil filter wrench removing an engine oil filter from underneath a vehicle during a routine oil change service

Preventive Maintenance

The inexpensive services that prevent expensive roadside failures.

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Fuel pressure test gauge connected to an engine fuel rail test port while measuring fuel pump pressure during fuel system testing

Fuel System

Pressure, volume, and injector testing that fixes rough running instead of guessing at it.

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How it works

Our process

Four clear steps from your first call to a repair you approved in writing.

  1. Driver's hands holding a smartphone showing an auto repair booking screen inside a car

    Step 1

    Consultation & Booking

    Reach out online or by phone to share your vehicle's symptoms and schedule a convenient appointment.

  2. Technician connecting a digital diagnostic scanner to an open engine bay in a clean modern workshop

    Step 2

    Diagnostic Testing

    Using advanced diagnostic equipment, Derrick M. evaluates the symptoms to pinpoint the precise root cause of the issue.

  3. Tablet displaying an itemized car repair estimate on a service counter beside a set of car keys

    Step 3

    Upfront Estimate & Approval

    Receive a transparent, plain-English explanation of the necessary repairs and a price quote before any work starts.

  4. Mechanic's hands using a wrench to secure an engine component under dramatic shop lighting

    Step 4

    Precision Repair

    Once approved, expert maintenance or component replacement is carried out using high-grade parts and proven techniques.

Why drivers trust us

Protections you can count on

Diagnosis first, written pricing second, repairs backed by the owner who performed them.

Our guarantee

Backed by our 100% customer satisfaction commitment, transparent written estimates before work, and flat-rate labor guarantees.

Master mechanic's hands holding a chrome combination wrench over an open car engine bay

Blue Seal master mechanic

32+ years of certified diagnostic and mechanical experience on every job.

Mechanic holding a handheld OBD-II diagnostic scan tool plugged in under a car dashboard

Diagnostics before parts

Live sensor data and circuit testing isolate the real root cause first.

Mechanic writing a repair estimate on a clipboard in front of a car raised on a garage lift

Written estimates first

You approve a detailed written estimate before any work begins.

Gloved mechanic torquing a wheel hub with a torque wrench beside a brake rotor

Flat-rate labor

Standardized labor pricing — no unpredictable hourly clock.

Mobile mechanic at a service van parked beside a car with its hood open on a residential street

Mobile service radius

Mobile repair within 5 miles of April Lane ($50–$99 plus labor and tax).

Owner-operator mechanic standing with arms crossed in front of an open car hood in his garage

Owner-operated accountability

Derrick personally performs and tests every repair.

Google reviews

What Columbus drivers say

4.2 average from 21 Google reviews

Derrick was great to work with. He was extremely responsive and got back to me quickly with a quote. His price was fair and the service was good. My car was done on time as promised. I will be using him again in the future the next time I need some work done.
Elliot MilmeisterSteering & suspension repair
View on Google
Derrick was very friendly, honest, and transparent. He walked me through all the repairs my car needed. My car may get another 60 to 80 thousand miles after working with him. I highly recommend.
Alijah's Father
View on Google
The mechanic was very informative and upfront. I recommend him for your car repair needs, he even spoke with me after hours to get an idea of what my car needed and then got it fixed the very next day. Oh not to mention he gave me a ride to work.
Elijah Inyang
View on Google
After two other mobile mechanics looked at my car giving me a diagnostic that wasn't the issue, I was frustrated and ready to give up. Contacted Derrick who could hear the frustration in my voice, calmed me down and assured he can figure the issue out. Took my car the same day, Derrick hooked my car up giving me the real diagnosis and the next day I had it back. Very patient, professional, and very EFFICIENT!!! He is definitely worth it!!
Keyonna ColquittA/C installation & repair
View on Google
I can't thank Derrick enough for his help in getting my vehicle back on the road. The car needed a new turbocharger. Derrick got me in the same day and did it for considerably less than other repair shops had quoted. If you're looking for a dependable mechanic that treats his customer right, give Derrick a call!!
Don Oates
View on Google
I had a great conversation with the owner. This man knows cars and more importantly he uses high tech equipment. What really stood out for me was the amount of research he does before even agreeing to take a job. Who passes up a job right? Clearly someone who cares about their work.
Maxx's Mama
View on Google
Thank you so much Mr Derrick! I was able to speak with him about my alternator going out and he got me in quickly, gave me my quote and also gave me other recommendations without being forceful! I will be a returning customer.
Dimesha Walker
View on Google
Great guy, great service! The value of his auto repair expertise is more than what I can pay, yet the prices are very reasonable. If you're looking for a trustworthy, great repairman, I recommend using this service.
Quaysean Shepherd
View on Google
Very personable with great customer service! Walked through the whole process about my car starter from problem, price, to resolution. Will definitely recommend!
Erik Kelley
View on Google
Went above and behind to help me out. Derrick helped start my car after my alternator went out and replaced it the same day. Fair prices as well.
Devin Lambert
View on Google
Mr. Derrick was great, professional and very knowledgeable of his work! I highly recommend him for services!
Beverly Stapleton
View on Google
I had a great experience with Derrick! He quickly diagnosed the issue with my car and had it repaired within 24 hours. He took the time to explain exactly what was wrong, what needed to be fixed, and made sure I understood everything. He also worked with my budget, which meant a lot. As a woman, it can sometimes be intimidating taking your car to a mechanic, but I felt completely respected and trusted him throughout the entire process.
Kandy B
View on Google
Derrick was great to work with. He was extremely responsive and got back to me quickly with a quote. His price was fair and the service was good. My car was done on time as promised. I will be using him again in the future the next time I need some work done.
Elliot MilmeisterSteering & suspension repair
View on Google
Derrick was very friendly, honest, and transparent. He walked me through all the repairs my car needed. My car may get another 60 to 80 thousand miles after working with him. I highly recommend.
Alijah's Father
View on Google
The mechanic was very informative and upfront. I recommend him for your car repair needs, he even spoke with me after hours to get an idea of what my car needed and then got it fixed the very next day. Oh not to mention he gave me a ride to work.
Elijah Inyang
View on Google
After two other mobile mechanics looked at my car giving me a diagnostic that wasn't the issue, I was frustrated and ready to give up. Contacted Derrick who could hear the frustration in my voice, calmed me down and assured he can figure the issue out. Took my car the same day, Derrick hooked my car up giving me the real diagnosis and the next day I had it back. Very patient, professional, and very EFFICIENT!!! He is definitely worth it!!
Keyonna ColquittA/C installation & repair
View on Google
I can't thank Derrick enough for his help in getting my vehicle back on the road. The car needed a new turbocharger. Derrick got me in the same day and did it for considerably less than other repair shops had quoted. If you're looking for a dependable mechanic that treats his customer right, give Derrick a call!!
Don Oates
View on Google
I had a great conversation with the owner. This man knows cars and more importantly he uses high tech equipment. What really stood out for me was the amount of research he does before even agreeing to take a job. Who passes up a job right? Clearly someone who cares about their work.
Maxx's Mama
View on Google
Thank you so much Mr Derrick! I was able to speak with him about my alternator going out and he got me in quickly, gave me my quote and also gave me other recommendations without being forceful! I will be a returning customer.
Dimesha Walker
View on Google
Great guy, great service! The value of his auto repair expertise is more than what I can pay, yet the prices are very reasonable. If you're looking for a trustworthy, great repairman, I recommend using this service.
Quaysean Shepherd
View on Google
Very personable with great customer service! Walked through the whole process about my car starter from problem, price, to resolution. Will definitely recommend!
Erik Kelley
View on Google
Went above and behind to help me out. Derrick helped start my car after my alternator went out and replaced it the same day. Fair prices as well.
Devin Lambert
View on Google
Mr. Derrick was great, professional and very knowledgeable of his work! I highly recommend him for services!
Beverly Stapleton
View on Google
I had a great experience with Derrick! He quickly diagnosed the issue with my car and had it repaired within 24 hours. He took the time to explain exactly what was wrong, what needed to be fixed, and made sure I understood everything. He also worked with my budget, which meant a lot. As a woman, it can sometimes be intimidating taking your car to a mechanic, but I felt completely respected and trusted him throughout the entire process.
Kandy B
View on Google

Where we work

Areas we serve

In-shop on April Lane, plus mobile repair within roughly 5 miles.

  • Columbus, OH

    43227 · 43232 · 43213 · 43206

  • Reynoldsburg, OH

    43068

  • Whitehall, OH

    43213

  • Bexley, OH

    43209

  • Gahanna, OH

    43230

  • Groveport, OH

    43125

  • Pickerington, OH

    43147

  • Upper Arlington, OH

    43221

  • Worthington, OH

    43085

Mobile service within ~5 miles of 3765 April Ln, Columbus, OH 43227

Dimly lit auto repair garage bay with tool chests and a closed roll-up door at Speedy Underhood Service in Columbus, Ohio

Written estimates

Ready For A Precise Diagnosis?

Request a consultation with Derrick M. about diagnostics, brakes, engine, A/C or mobile repair anywhere within 5 miles of our Columbus shop.