Spark plugs may look small, but they play a big role in engine performance. We see many drivers trade in or bring in vehicles with misfires or poor fuel economy. At Great Lakes Hyundai, we help owners protect their engines and avoid costly repairs by showing them when and how to address basic wear issues. If you're driving one of our new Hyundai models, staying ahead of spark plug wear helps you keep your vehicle in peak shape.
Replace Worn Hyundai Spark Plugs Before They Fail
Drivers often overlook spark plugs until symptoms appear. Misfires, rough idling, or slow acceleration can all signal spark plug wear. These plugs ignite the air and fuel mixture inside each cylinder. Worn plugs reduce ignition strength, which affects fuel efficiency and increases emissions. In some cases, delayed replacement can cause damage to ignition coils or the catalytic converter.
Copper spark plugs tend to wear faster, while iridium or platinum plugs last longer. Still, no plug lasts forever. Engine design, driving conditions, and maintenance habits all influence how long your spark plugs last. Following your factory maintenance schedule is the best way to avoid unexpected problems.
Symptoms That Signal It's Time
You might notice your vehicle takes longer to start or runs rough while idling. A drop in fuel economy can also point to worn spark plugs. In some cases, you might feel the engine hesitate when you press the gas pedal. If a spark plug fully fails, your check engine light will likely turn on. A diagnostic scan tool will often reveal a misfire code tied to one or more cylinders.
Carbon build-up on the plugs or fouling from oil or coolant leaks can also shorten their life. When this happens, performance drops quickly. You may also smell fuel near the exhaust if the mixture isn't igniting properly. These signs often appear slowly but should never be ignored.
Why Spark Plug Quality Matters
OEM spark plugs are specifically designed to match your engine's heat range and firing characteristics. Using the wrong type can lead to overheating or incomplete combustion. Aftermarket options might not match Hyundai's specifications and could wear out faster or cause performance issues. Always use plugs that meet or exceed the original specifications.
Some engines use coil-on-plug ignition systems that require precise spark control. Mismatched or old plugs can interfere with this timing. High-performance engines, like those found in N-Line or turbocharged models, put even more stress on plugs. Proper torque and gap also matter. Improper installation can lead to hot spots or cracking around the plug threads.
Regular Service Protects Engine Life
Following factory service intervals helps avoid wear-related issues. Most Hyundai models recommend spark plug inspection around 30,000 miles and replacement every 60,000 to 105,000 miles, depending on plug type. Your owner's manual will give the exact range for your model. These intervals are based on typical driving habits, but harsher conditions can shorten those timeframes.
City driving with frequent starts and stops can put more strain on your ignition system. If you notice any symptoms or pass your recommended mileage, it's time to have a technician check the plugs. Addressing these issues early can prevent damage to other engine components and keep your vehicle running reliably.
Let Us Handle Your Spark Plug Service
We don't recommend trying to replace worn Hyundai spark plugs on your own. Incorrect removal or installation can cause damage or breakage to the threads inside the cylinder head. Specialized tools and factory torque specs make a big difference in long-term reliability. Our certified technicians know what your vehicle needs and have the right equipment to get it done right.
At Great Lakes Hyundai, we make spark plug service quick and hassle-free. Book an appointment online, and our team will inspect and replace your plugs with OEM parts to protect your engine. Schedule a service today.
