Your Subaru vehicle requires ignition in order to start. That only occurs thanks to the factory spark plugs, which provide the initial flash that ignites the mixture of air and fuel inside your vehicle's engine.

How Do Spark Plugs Work?

That flash is created when the spark plugs fire an arc of electricity across gaps between their leads. Those gaps are precisely calibrated to provide the ideal sparking required to kindle the mixture inside the combustion chamber.

If your model has a diesel engine, though, it uses glow plugs instead of spark plugs. These have a heating element in their tip, which ignites the fuel mist thatÕs sprayed into the engine cylinder.

How Do You Recognize Failing Spark Plugs?

Eventually, though, your spark plugs will weaken. Maybe they've become corroded. Perhaps the gaps have grown too far apart to produce an effective spark. Signs of trouble include:

Engine misfires
Trouble starting your vehicle
Rougher engine idle than normal
The "Check Engine" dash light comes on

Why Trust Genuine Subaru Spark Plugs?

If you aren't experiencing any of these symptoms, consult your owner's manual to see when you need to replace your spark plugs. Changing yours before they pass their mileage rating ensures consistent, even performance.

Subaru makes their spark plugs to meet your model's needs, delivering the kind of guaranteed compatibility that just can't be matched. Our online auto parts department has a great selection in stock and ready to ship, so buy now to save both time and money!