OEM VW spark plugs should be replaced as recommended in the owner’s manual of your vehicle. Since it can be hard to tell if your spark plugs have gone bad, regular service is important for the proper functioning of your vehicle’s engine. By using only OEM spark plugs for VW, you're guaranteed the perfect fit and tolerances for your engine, meaning the best performance possible.
The VW spark plugs in your , , or other VW model's engine are probably not something you think about too often as they’re small and seem so inconsequential. However, malfunctioning spark plugs can cause you some serious grief and trouble driving your car.