The spark plugs in your Toyota vehicle are responsible for firing the air-and-fuel mix inside your engine. The process begins when you either turn your key in the ignition cylinder or press the start button on your dash. That activates the ignition switch, which tell your car battery, ignition coil, starter motor, and starter solenoid to get to work in producing an electric charge. The spark plugs capture that charge and use it to begin the combustion process.

How Spark Plugs Work

That electric charge is sent across the gap between two leads in the spark plug head. That gap is precisely calibrated to produce the sparking needed to ignite that air/fuel mixture. Once that happens, the pistons start to pump, and the crankshaft begins turning.

When to Replace Your Spark Plugs

Spark plugs don't last forever, but you can expect to get up to 100,000 miles of service from your factory-installed plugs before replacing them. Check your owner's manual for the recommended maintenance schedule, though. You don't want yours to go past that rated mileage, or you may begin to experience problems. Those include:

Your engine misfires
You notice your vehicle idling is unsteady
You have problems starting your Toyota
Your "Check Engine" dash light comes on

Buy Your Genuine Toyota Spark Plugs Online

Don't risk driving with failing spark plugs, because that can lead to serious engine damage. When it's time to replace your old set, choose the spark plugs that work best for your model. Those are the real-deal spark plugs that are guaranteed by Toyota to be compatible with your vehicle. Order yours from our online auto parts catalog today and we'll ship straight to your door!