OEM VW and Saab Spark Plugs

Spark plugs are little metal rods in a ceramic housing that provides the spark your vehicle needs to ignite the fuel to your engine that makes it run. Without that spark, your vehicle would not go anywhere. Your spark plugs are one of the most durable parts of your engine. They typically need to be replaced every 20,000 to 30,000 miles.  If your vehicle starts running rough or if the tips of the spark plugs are burned or broken you should replace them as soon as possible.