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Emissions Testing in Kearns, UT

Salt Lake County emissions tests plus repair and retest in one shop, so Kearns drivers can renew registration without the runaround. Walk-ins welcome.

Or request an estimate

4.6 ★ · 719 Google reviews

4219 W 5415 S, Kearns, UT 84118 · Get Directions

Mon-Fri 7:30am-6:00pm | Sat 8:00am-4:00pm | Sun Closed ·

  • Waiting room
  • Free Wi-Fi
  • Open Saturdays
  • Walk-ins welcome
  • Online booking

12-month / 12,000-mile warranty* on parts & labor

Honored at every Master AutoTech location · Serving Utah and Idaho since 1963

*Exclusions apply. Ask your service advisor for full warranty terms.

Emissions Testing at Master AutoTech Kearns in Kearns, UT

  • ASE Certified Technicians
  • Best of State Utah
  • Top Workplaces
  • Family Owned Since 1963

Master AutoTech Kearns performs Salt Lake County emissions testing and emissions repairs so drivers across Kearns, Taylorsville and West Valley City can renew their registration on time. If your vehicle doesn’t pass, we diagnose why, fix it and retest it in the same shop.

Salt Lake County drivers need an emissions test to renew registration, and our shop makes it easy: we’re on 5400 South near the Kearns Library. Most tests take under half an hour.

Emissions Services We Offer

Emissions test

Salt Lake County emissions test for registration renewal. Most tests take about 15–30 minutes.

Certified testing station

Emissions repair & retest

If you fail, we find the cause, from oxygen sensors to catalytic converters, repair it and retest.

Pre-test check

Worried about failing? We scan for codes and readiness monitors before you test.

Why Choose Master AutoTech Kearns for Emissions

Test and repair in one place

No bouncing between a test-only station and a repair shop.

We fix the cause

Codes tell us where to look; testing tells us what actually failed.

Open Saturdays

Test on Saturday, 8:00am to 4:00pm, without missing work.

Warranty on repairs

Emissions repairs are covered by our 12-month / 12,000-mile warranty*.

Our Certifications

Every Kearns technician is required to earn ASE certification within 90 days of joining our team.

Current Offers

Featured offer

Buy 3 Tires, Get the 4th Free

On new tires installed at Master AutoTech, October 1 – December 31, 2026. Ends December 31, 2026. See offer details.

More coupons & specials

Browse every current Master AutoTech coupon, plus our ProCare, Certified and Master service packages.

View All Coupons & Specials

How Salt Lake County Emissions Testing Works

Salt Lake County requires an emissions test for most gasoline and diesel vehicles to renew registration. Your renewal notice tells you whether your vehicle needs one this year. Here’s what to expect:

  1. Bring your vehicle and registration renewal notice. The test is tied to your VIN and plate.
  2. We connect to your vehicle’s computer. On 1996 and newer vehicles, the test reads the on-board diagnostic (OBD-II) system and readiness monitors.
  3. Results are sent electronically. A pass is reported to the state so you can renew online.
  4. If it fails, we explain why. You’ll get the codes and our recommendation before any repair.

Common Reasons Vehicles Fail Emissions

These are the repairs we see most often after a failed test:

  • Check engine light on
  • Faulty oxygen sensors
  • Failing catalytic converter
  • Loose or damaged gas cap
  • EVAP system leaks
  • Engine misfires from plugs or coils
  • Readiness monitors not set after a battery change

Tip: if you recently replaced the battery or cleared codes, drive normally for a few days before testing so the monitors can reset.

How Much Does Emissions Testing Cost in Kearns?

Emissions test fees are set by the county, so the price depends on where your vehicle is registered. If your vehicle fails, repair cost depends on the cause: a gas cap or sensor is a small repair, while a catalytic converter is a bigger one. We always show you the codes and quote the repair before starting.

Need to spread out the cost? Master AutoTech offers several financing options, including the Goodyear Credit Card (6-month special financing on purchases of $250 or more), the Synchrony Car Care credit card, the 1stMILE Mastercard, Snap Finance, Acima, Surepay and RC Willey financing.

Emissions Repairs We Handle

  • Oxygen and air-fuel ratio sensors
  • Catalytic converters (see muffler & exhaust)
  • EVAP purge and vent valves, hoses and gas caps
  • Ignition coils, spark plugs and misfire repair
  • EGR valves and passages
  • Exhaust leaks ahead of the oxygen sensors

Environmental Responsibility

The Salt Lake Valley’s winter inversions trap pollution in the valley, and vehicle emissions are a big part of it. Keeping your vehicle in spec isn’t only a registration requirement; it helps keep Salt Lake County air cleaner and usually improves fuel economy too.

What Kearns Drivers Say

4.6 ★ · 719 Google reviews

“Riley did awesome work to my 05 Saturn Relay had an exhaust leak. Took care of my vehicle in less than 30 min and got me back on the road. I’ll be sure to return, for any other future services. Thank you!”

Juan Araujo

“Great place to go, reasonable prices and they take care of you quickly. I had my rims put on and shocks replaced. Wonderful people to do business with. Recommend them highly!”

Tania King

“***HIGHLY RECOMMEND*** “Amazing work on replacing my 2015 Ford Edge transfer case and drive shaft!! Big job, but these guys did it. So grateful for the whole process and commitment to get it done.”

Carmen Ramirez

About Master AutoTech Kearns

We’re a family-owned shop that treats every vehicle like it belongs to a neighbor. Master AutoTech started as Master Muffler in 1963 and grew into Utah’s largest auto repair franchise. Every technician here earns ASE certification within 90 days of joining the team. Meet our team.

You’ll find us on 5400 South near the Kearns Library, with I-215 a few minutes east. Pull into our lot right out front.

Wait in our waiting room with free Wi-Fi, or step out while we work: Loco Burger and Stan’s Market are right next door. We take care of drivers from Kearns, Taylorsville, West Valley City, Magna and West Jordan every day.

Free app · iPhone & Android

Download the Master AutoTech app and earn rewards

  • Rewards & offersOffers and rewards land right in the app, not in a drawer full of coupons.
  • Check-engine alertsSee the actual codes your car is throwing and message the shop about them.
  • Maintenance trackingKnow what’s due and what’s overdue, with a weekly report on your vehicle.
  • Glove BoxKeep registration, insurance and service records in one place.

How to get rewards: download the free app and your offers and rewards land right in it, ready to use at your next visit. Open the app before your visit to see what’s waiting for you. Book a Master Oil Change and get a free Master Link that connects your car to the app.

Download on the App StoreGet it on Google Play
Master AutoTech app home screen and vehicle profile

Areas We Serve

Drivers come to Master AutoTech Kearns for emissions testing from across Kearns, Taylorsville and West Valley City.

Book an AppointmentCall 801-657-5000

Mon-Fri 7:30am-6:00pm | Sat 8:00am-4:00pm | Sun Closed

Get Directions · 4219 W 5415 S, Kearns

✓ 12-month / 12,000-mile warranty* *Exclusions apply.

✓ Financing available · See options

✓ Free check engine light scan before you test

✓ Get rewards in the Master AutoTech app

Offer

Buy 3 Tires, Get the 4th Free

Buy 3 tires, get the 4th free, Oct 1 – Dec 31.

Ends December 31, 2026 · Details

Nearby Master AutoTech Locations

Master AutoTech West Valley

3.1 miles away

4118 W 3500 S
West Valley City, UT 84120

801-416-3972

Emissions Testing in West Valley

Master AutoTech Murray

5.4 miles away

6790 State St
Murray, UT 84107

801-305-3575

Emissions Testing in Murray

Master AutoTech Tooele

18.0 miles away

278 N Main St
Tooele, UT 84074

435-228-7288

Visit this store

Other Services at This Location

Muffler & Exhaust

Mufflers, pipes and custom exhaust

Engine Repair

Diagnosis, repairs and rebuilds

Tune-Ups

Plugs, filters and fluid service

Oil Changes

Synthetic, blend and high-mileage oil

Brake Repair

Pads, rotors and brake inspections

Tires

New tires, rotation and flat repair

Frequently Asked Questions

Yes. Master AutoTech Kearns is on 5400 South near the Kearns Library at 4219 W 5415 S, Kearns, and we handle emissions testing for drivers from Taylorsville and Magna every day. Book online or call 801-657-5000.

Just your vehicle and your registration or renewal notice. Most tests at our Kearns shop take under half an hour, and if your vehicle fails, we can diagnose it, repair it and retest.

Master AutoTech Kearns at 4219 W 5415 S, Kearns, UT 84118, tests vehicles for Salt Lake County registration renewal. We’re open Monday to Friday 7:30am to 6:00pm and Saturday 8:00am to 4:00pm.

Most emissions tests take about 15 to 30 minutes. If your vehicle needs repairs, we’ll explain the problem and give you an estimate before doing anything.

No. Walk-ins are welcome for emissions tests. You can also book online or call 801-657-5000 to reserve a time.

We’ll show you why it failed, recommend the repair and give you a price. After the repair, we retest the vehicle so you can finish your registration renewal.

Yes. Emissions repairs at Master AutoTech Kearns are covered by our 12-month / 12,000-mile warranty* on parts and labor.

Most vehicles in Salt Lake County need a test every one to two years, depending on the vehicle’s age. Your registration renewal notice tells you whether a test is due this year.

No. Whether you need one depends on your vehicle’s age, fuel type and registration. Call 801-657-5000 with your year and model and we’ll tell you if it’s required.

Yes. We’re a full-service shop, so you can pair your emissions test with an oil change, brake check or any repair in one visit.

In most cases, yes. An illuminated check engine light on a 1996 or newer vehicle is typically an automatic fail. We offer a free check engine light scan so you can fix the issue before testing.

Visit Master AutoTech Kearns

Master AutoTech Kearns
4219 W 5415 S
Kearns, UT 84118
Get Directions

Mon-Fri 7:30am-6:00pm
Sat 8:00am-4:00pm
Sun Closed

Getting here

  • From I-215: Take the 5400 South exit west; we’re on 5400 South near 4200 West, by the Kearns Library.
  • Parking: Pull into our new parking lot right out front on 5400 South.