Your Toyota Avalon engine must burn fuel to create the power your sedan uses to run. However, other auto parts must spark that gas to start the combustion process. They're your original Toyota Avalon spark plugs. Without them, your car wouldn't be able to start at all; its ignition system would be effectively dead. How spark plugs work is simple. They spark a current of electricity between leads. This breaks the chemical bonds between your engine's air and gas molecules. The fuel burns, making power. A pump of your engine pistons, a turn of your crankshaft, and the right moving parts get your sedan going. Over time, though, even top-quality Toyota Avalon spark plugs go bad; plug leads oxidize or simply widen, making smaller and weaker sparks. When spark plugs fail, engine misfires happen. Your engine, then, either won't work as well or it'll fail completely. Broken spark plugs make bad go to worse; they usually seriously damage an engine cylinder. Luckily, today's spark plugs are made for extended life. Their high-durability construction withstands ignitions in the millions, for up to 100,000 miles. Just change any spark plug before it goes over its recommended mileage. The spark plugs you need for that are genuine Toyota. They fit the best, and our auto parts department has what you need. Get your ignition working again order your Toyota Avalon spark plugs online today!