Expert Diagnostic Services

Get to the Root of the Problem

We Get To The Bottom Of The Issue

Many auto parts stores offer free diagnostic scans for dash lights like the check engine light. While these scans reveal vehicle fault codes, they do not pinpoint which parts have failed. At Zarn Automotive, our diagnostic services go beyond just reading codes.

Check engine light

Common Issues

Automotive diagnostics is similar to visiting a doctor when you're sick. You describe your symptoms (fault codes), and then the doctor orders tests like blood work and x-rays (diagnostic testing) to pinpoint the issue. Our experienced team at Zarn Automotive uses specialty tools and testing equipment to accurately diagnose and repair your vehicle. Common check engine light issues might include:

  • Loose or damaged gas cap
  • Faulty oxygen sensor
  • Malfunctioning catalytic converter
  • Bad spark plugs or spark plug wires
  • Issues with the mass airflow sensor
  • Faulty ignition coil(s)
Internal components of a motor vehicle

Why trust Zarn Automotive with your car's diagnostics, maintenance, and repairs?

  • Expertise You Can Trust: With over 14 years of industry experience, Zarn Automotive boasts a team of expert technicians who are dedicated to delivering top-notch service and repair solutions for all vehicle makes and models.
  • Comprehensive Services: From routine maintenance to complex repairs, we offer a wide range of automotive services to meet all your vehicle's needs under one roof, saving you time and hassle.
  • Customer Satisfaction Guaranteed: At Zarn Automotive, we prioritize your satisfaction above all else. With transparent communication, fair pricing, and a commitment to quality workmanship, we strive to exceed your expectations with every visit.

Schedule a Diagnostic Service with Zarn Automotive Today to Get to the Bottom of Your Vehicle's Issues.

Don't ignore your check engine light. Our expert team is here to ensure your vehicle is running smoothly and safely.

Reviews

kody judkins

kody judkins

12/29/2025

I recently took my wife’s 2017 Mercedes GLS450 to Zarn Automotive, and while car issues are never fun - especially right before the holidays... the team there made the experience as smooth as possible. They were honest, transparent, and provided a clear plan for the necessary repairs. They fixed the coolant system issues and installed a new drive belt. Micah and Neil were incredibly professional and straightforward about everything that needed attention. We’ll be scheduling some follow‑up work, but I truly appreciate their honesty, hard work, and the fact that they got the car back to us before Christmas Day. Highly recommend this team.

Becky Moseman

Becky Moseman

12/15/2025

In the last 8 months I've used Zarn twice-- most recently to fix an electrical issue with sensors and previously to diagnose and eventually replace my transmission. Their customer service is stellar. I was in a time crunch this past weekend needing to know if my car was drivable out of town for a soccer tournament. They got me in quickly to diagnose the problem and managed to get my car repaired and ready to drive for the weekend. I know that isn't possible all the time but it really helped me out. Zarn communicates well and timely. Their prices are reasonable. Mostly, they are honest and not trying to upsell on anything. They are patient and take time to answer all my questions about car stuff I don't understand. This is why I'm a repeat customer.

Mike Freeman

Mike Freeman

10/24/2025

First time using Zarn, for transmission service on my Alfa Romeo Guilia. Called & spoke with Micah, who texted me a detailed estimate. Very friendly, courteous & professional. Seemed knowledgeable, got me in and out in a reasonable time, price matched the estimate. They do walk-in/same day on routine service. Will definitely be back & would recommend

Barbara Munter

Barbara Munter

11/25/2025

Neil and his team have taken care of my Porsche and Lexus for years, they are Excellent to work with!!! The maintence oil changes and regular maintence is WAY more cost effective than the dealership!!! Always quick to respond and top notch customer service!!! I Highly Recommend you give Neil and his team a try, you will not regret it!!!!

K Crook

K Crook

11/4/2025

I brought in my Infinity for a 2nd opinion on a repair that our dealership told us we needed. ZARN went above and beyond our expectations in figuring out what the exact problem was and what needed to be done to fix it! There inspection was much more thorough than the dealership and they were amazing at explaining to us exactly what was wrong and how that would effect my car in the long run!! All the employees there were knowledgeable about cars and would do anything to help us out. I can’t say enough about ZARN…..we will definitely use them now instead of the pricey dealership service departments!!

Contact Zarn Automotive

2010 N. Yellowood Ave, Broken Arrow OK 74012

zarnautomotivellc@gmail.com

MONDAY8AM - 5PMTUESDAY8AM - 5PMWEDNESDAY8AM - 5PMTHURSDAY8AM - 5PMFRIDAY8AM - 5PMSATURDAYCLOSEDSUNDAYCLOSED

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Need service sooner than ASAP? We understand. Give us a call! (918) 940-7800