If you own a hybrid, you may be wondering how often you need to change the spark plugs. The answer isn't as simple as it is for a traditional gasoline engine, but we'll try to give you some guidelines.
First, it's important to know that there are two types of spark plugs in a hybrid: the high voltage ones that ignite the fuel-air mixture in the cylinders, and the low voltage ones that preheat the catalytic converter. Both types are designed to last for the life of the vehicle and don't need to be changed regularly.
However, if your hybrid is experiencing any kind of performance issues, it's a good idea to take a look at the spark plugs. It's possible that one or more of them could be fouled or damaged and needs to be replaced.
If you're not sure whether or not your spark plugs need to be changed, consult your owner's manual or take it to a qualified mechanic for an inspection.