The Best Toyota Spark Plugs

What Do Spark Plugs Do?

They ignite the mix of fuel and oxygen in your engine. The ignition process is called "spark ignition."

How Does Spark Ignition Work?

Turn your key in your vehicle's ignition lock cylinder, and you'll see. First, your ignition switch activates. Then, your car battery, a starter motor, a starter solenoid, and an ignition coil begin working. Together, they produce a small electrical charge -- a "spark," for short. The plugs' leads capture it, ignition occurs, your engine pistons pump, and your crankshaft turns.

When Do Spark Plugs Need to be Replaced?

They don't last indefinitely, unfortunately. Sometimes, their leads rust or widen. It makes them less able to capture sparks as well. Also, if your engine starts misfiring or it fails, it's often because of bad spark plugs. Broken spark plugs, however, are worse: they can seriously damage your engine cylinders.

In any such cases, inspect your spark plugs to determine what's happening, and if necessary, replace them. Those your OEM makes for your vehicle are tough enough to last for millions of ignitions, often for as many as 100,000 miles. Just don't allow them to surpass the mileage limits recommended in your owner's manual.

Buy the Best Spark Plugs for Your Toyota or Scion Vehicle Online

Whatever model you drive, its spark plugs should be genuine. After all, Toyota & Scion design them compatible with their vehicles right from the start. You can order all you need right here on the Web. Just be sure to browse our catalog by your make, model, and model year to ensure you're getting the proper fit. Buy now, and we'll deliver them to your door ASAP.