OEM Jaguar Spark Plugs

Your Jaguar car or SUV won't start without ignition. Ignition wouldn’t take place without your spark plugs, though. That's because they're responsible for producing the initial flash that kindles the mixture of air and fuel inside your engine.

How Spark Plugs Work

First, you need to either turn your key in the ignition cylinder or, if you have a newer model, press the "Start" button. That causes the battery, ignition coil, starter motor, and starter solenoid to produce a small electric charge. That charge is captured by the spark plugs' leads and used to kick off the combustion process and get your motor running.

If your Jaguar has a diesel engine, though, it features glow plugs instead of spark plugs. Those have a heating element in their tips, which ignites the diesel mist sprayed into your engine cylinders.

How to Spot Failing Spark Plugs

However, no spark plug lasts forever. They can become corroded or the gaps between the leads can grow too wide to produce effective sparking. If that happens, your engine won't respond in the manner to which you're accustomed. Signs of trouble include:

• The engine begins to misfire
• Problems starting your Jaguar
• Your engine idle is rougher than usual
• The "Check Engine" light comes on

Buy Genuine OEM Spark Plugs Online

If you aren’t experiencing any of these symptoms, consult your owner's manual to determine when you need to replace your spark plugs. You're best off not pushing yours past their recommended mileage if you want to maintain peak engine performance. When you do need to replace yours, choose the ones Jaguar designed and made specifically for your model. That ensures the compatibility you need. Find them right here in our online auto parts catalog, in stock and ready to ship. Buy now to save both time and money!