Spark Plugs

Your Toyota vehicle needs ignition in order to start, and that doesn't happen without the spark plugs. They're what provides the initial flash of electricity that ignites the mixture of oxygen and fuel inside the engine's combustion chamber.

The ignition switch activates when you turn the ignition key or press the "Start" button. Then the battery, starter motor, ignition coil, and starter solenoid work together to produce an electric charge. The spark plugs capture that and send it across a gap between two leads to initiate combustion.

How to Recognize Spark Plug Issues

Your spark plugs can last up to 100,000 miles before they need to be replaced, but you should always check your owner's manual for the recommended mileage rating. You want to change yours before they reach that limit, or you may experience problems such as:

• Misfiring engine
• Uneven idling
• Trouble starting
• "Check Engine" dash light comes on

Buy Genuine OEM Spark Plugs Online

It's natural to assume that your alternator is at fault when you begin to experience engine misfires and shutdowns, but check your spark plugs first. If they've grown corroded or the gaps have widened too far, replace them with a new set. Authentic Toyota spark plugs are guaranteed to be compatible with your model's engine. Our online auto parts store has yours in stock and ready to ship, so buy now!