TAKING AUTO REPAIR TO THE NEXT LEVEL

Service and vehicle repair all in one!

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SQUEAKING OR SQUEALING?

Our expert mechanics can help you change your brakes

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YOUR TRUSTED SOURCE FOR AUTO REPAIR

Visit us and see why we are the best choice!

SERVICES OFFERED

MAKING SURE YOUR ENGINE RUNS SMOOTH

Vehicle repair from the experts!

ENGINE SERVICES

MAKING SURE YOU DRIVE STRAIT

Maintenance when you need it!

ALIGNMENT

YOUR SOURCE FOR TIRES

We can help you find the perfect match!

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BIG OR SMALL, WE DO IT ALL

Fleet vehicle repair from the experts!

FLEET SERVICES

Tiernan's Service Center, Granger's Best Auto Repair Services

Since 2011, Tiernan's Service Center has provided the Granger area with five-star auto repair. Our goal is to offer top-notch auto repair services available at affordable prices. Call today to schedule an appointment at 515-577-5643 or come by the shop at 2200 Kennedy St.

Convenient and Fast

We know your time is important. That's why we are conveniently located near you in Granger, IA. Most truck or car maintenance services can be performed while you wait. Many repairs can be completed the same day. Difficult or easy, our mechanics will get your auto repairs done quickly and get you back on the road in a jiffy. Call today to schedule an appointment at 515-577-5643.

How Much Will It Cost?

We will provide you with a straight-forward estimate before beginning any repairs. Ask us about options to keep auto repair cost low or discuss upgrades with one of our mechanics to keep your car running at peak performance. We stand behind all of our work with a guarantee you can take to the bank.

We Can Handle It

We provide the Granger area with reliable, affordable automotive maintenance and repair services. You'll be hard-pressed to find the same level of professionalism and service that our auto mechanics provide! Our certified technicians and highly trained auto repair specialists provide the best service in Granger on domestic and import cars and trucks of all types.

Call today to schedule an appointment at 515-577-5643 or email us.

Discover What We Do!

Car & Truck Care, Electronic Services, Electrical Services, General Services, Heating and Cooling Services, Engine & Transmission, Miscellaneous Services, Towing, Transmission Services, and Undercar Services

    Confidence Plus North American Warranty

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    Areas We Serve

    Vehicle Tips

    According to recent studies, 5 percent of all motor vehicle fatalities are clearly caused by automobile maintenance neglect.

    The cooling system should be completely flushed and refilled about every 24 months. The level, condition, and concentration of coolant should be checked. (A 50/50 mix of anti-freeze and water is usually recommended.)

    Never remove the radiator cap until the engine has thoroughly cooled. The tightness and condition of drive belts, clamps and hoses should be checked by a pro.

    Change your oil and oil filter as specified in your manual, or more often (every 3,000 miles) if you make frequent short jaunts, extended trips with lots of luggage or tow a trailer.

    Replace other filters (air, fuel, PCV, etc.) as recommended, or more often in dusty conditions. Get engine drivability problems (hard stops, rough idling, stalling, diminished power, etc.) corrected at a good shop.

    A dirty windshield causes eye fatigue and can pose a safety hazard. Replace worn blades and get plenty of windshield washer solvent.

    Have your tires rotated about every 5,000 miles. Check tire pressures once a month; let the tires cool down first. Don't forget your spare and be sure your jack is in good condition.

    Check your owner's manual to find out what fuel octane rating your car's engine needs then buy it.

    Keep your tires inflated to the proper levels. Under-inflated tires make it harder for your car to move down the road, which means your engine uses more fuel to maintain speed.

    Lighten the load. Heavier vehicles use more fuel, so clean out unnecessary weight in the passenger compartment or trunk before you hit the road.

    Use the A/C sparingly. The air conditioner puts extra load on the engine forcing more fuel to be used.

    Keep your windows closed. Wide-open windows, especially at highway speeds, increase aerodynamic drag and the result is up to a 10% decrease in fuel economy.

    Avoid long idling. If you anticipate being stopped for more than one minute, shut off the car. Contrary to popular belief, restarting the car uses less fuel than letting it idle.

    Stay within posted speed limits. The faster you drive, the more fuel you use. For example, driving at 65 miles per hour (mph) rather than 55 mph, increases fuel consumption by 20 percent.

    Use cruise control. Using cruise control on highway trips can help you maintain a constant speed and, in most cases, reduce your fuel consumption.

    Keep your engine tuned. A fouled spark plug or plugged/restricted fuel injector can reduce fuel efficiency as much as 30 percent.

    Inspect the engine's belts regularly. Look for cracks or missing sections or segments. Worn belts will affect the engine performance.

    Have the fuel filter changed every 10,000 miles to prevent rust, dirt and other impurities from entering the fuel system.

    Change the transmission fluid and filter every 15,000 to 18,000 miles. This will protect the precision-crafted components of the transmission/transaxle.

    Inspect the suspension system regularly. This will extend the life of the vehicle's tires.

    What Our Customers Are Saying

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    The best service one could ask for!! Mark helped me and my daughter get back on the road as we were traveling through town! He was willing to go above and beyond to Make sure everything was good to go!! Couldn't have asked for anything better!
    , 04/12/2021
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    I've never experienced better customer service in my life.
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    Best service ever!
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    Good service. Ask for mark
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    Great place.
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    Mark is great to work with.
    ACDelco
    ASE (Automotive Service Excellence)
    IDENTIFIX
    BBB Accredited Business
    NFIB (National Federation of Independent Business)
    Interstate Batteries
    Car Care Aware