* V6 engines: Typically have 6 spark plugs.
* V8 engines: Typically have 8 or 16 spark plugs (depending on whether it's a single or dual spark plug per cylinder design).
You'll find the engine details on your vehicle's identification plate (usually located in the driver's side doorjamb). Once you know the engine, you can find the exact number of spark plugs online or in a repair manual.