Spark plugs are small components you rarely think about when they work properly. But they perform a crucial function for your Subaru’s internal combustion engine. Without spark plugs, your vehicle won’t move. They ignite the gas-air mixture in the combustion chamber to create the tiny explosions that move the pistons down. As the pistons move, they send power to the transmission to move your Subaru forward. In short — spark plugs provide the spark that drives your car across South Salt Lake, Salt Lake City, Millcreek, Murray, Holladay, and West Valley City every day.

Do you wonder how often to change the spark plugs in your Subaru? Experts generally recommend replacing spark plugs every 30,000 miles for the best performance. If one of your Subaru spark plugs wears out, it can cause reduced gas mileage and engine problems later on. Suddenly, you’ll notice a malfunctioning spark plug when you’re filling up at the gas station in Salt Lake County more often.

How often you change spark plugs may vary depending on your Subaru’s year and model. Check your owner’s manual for specific recommendations. Your driver information screen may also alert you when it’s time. We highly recommend using OEM Subaru parts for spark plug replacement because they’re engineered to perform with your vehicle.

Find out how often to change spark plugs and when to get new Subaru spark plugs with our guide. Then, contact the Mark Miller Subaru Midtown service center in South Salt Lake if you need spark plug service or other Subaru maintenance. Our certified Subaru technicians are here to help!

How Spark Plugs Work to Power Your Subaru

Your Subaru spark plugs transfer high-voltage current from the ignition coil to ignite the combustion chamber when you start your vehicle. Here’s how it works:

• Fuel injectors atomize gasoline into a fine mist inside the chamber.
• Air is added to the mix to provide oxygen for ignition.
• Spark plugs ignite the gas by releasing a spark at the precise moment the air and gasoline mix.
• Each small explosion pushes the pistons downward, powering the transmission and wheels.

This process happens hundreds of times per minute, even while idling in Salt Lake City traffic. Over 30,000 miles, spark plugs perform millions of ignitions, which is why routine replacement is essential.

When Should I Replace Subaru Spark Plugs?

If spark plugs aren’t functioning properly, your Subaru’s performance will suffer. Replace them before they cause larger engine issues. Signs you may need new spark plugs include:

• Slow or no start
• Engine misfires
• Rough idling
• Poor acceleration
• High fuel consumption
• Lower fuel efficiency

Spark plugs degrade over time, often collecting soot on the ignition tip, which weakens the spark. Faulty ignition coils can also cause failure. Our team at Mark Miller Subaru Midtown can inspect and replace your spark plugs quickly to keep your Subaru running smoothly in South Salt Lake and surrounding areas.

Benefits of Replacing Subaru Spark Plugs

Replacing spark plugs during routine Subaru maintenance ensures your engine stays in top shape. Benefits include:

• Improved fuel economy – Worn plugs can lower fuel efficiency by up to 30%. Replacing them helps restore gas mileage across Salt Lake County.
• Consistent combustion – Fresh plugs maintain proper combustion for smoother performance.
• Reliable starting – Your Subaru starts effortlessly when spark plugs are in good condition.
• Lower emissions – Better combustion means reduced emissions and fewer stops at the gas station in Millcreek or Holladay.
• Peace of mind – Drive with confidence knowing your Subaru is performing its best.

Get New Spark Plugs at Mark Miller Subaru Midtown

Now you know how often to replace spark plugs in your Subaru. Schedule a service appointment online or call us at 385-420-0017 to bring your vehicle in for spark plug replacement. This is a quick service that our team performs regularly for drivers in South Salt Lake, Salt Lake City, Murray, Millcreek, Holladay, and West Valley City.

Schedule Subaru spark plug service today, or contact us with any questions. The trusted Subaru service team at Mark Miller Subaru Midtown is here to keep your vehicle running at its best.