Spark Plug.

• Helps your engine convert fuel into useable energy
• Engine misfires, poor fuel efficiency, difficulty accelerating, and random shut offs are signs of a worn spark plug
• Replacement is best done by a professional technician

The spark plugs within your INFINITI are located in a line on the side or top of your vehicle's engine. At first glance, a Spark Plug looks somewhat like a long, oddly-shaped screw. However, it plays a vital role in your vehicle's overall function. If any Spark Plug is neglected for so long that it ceases operating properly, your INFINITI may no longer run.

The spark plugs in your INFINITI work with your engine to turn standard fuel into actionable energy so that you're able to drive your INFINITI. During this process, your Spark Plug triggers an electrical spark, igniting the extremely combustible combination of air and fuel in your INFINITI's combustion chamber. This process creates enough energy to get your car moving down the road. Without a properly functioning Spark Plug, the amount of power needed to ignite the fuel and turn it into actionable energy decreases, which can cause significant issues.

Spark plugs require regular inspection and servicing, much like filters and tires on your vehicle. If they not cared for regularly, you may begin to notice a few issues. Possible signs of an old or worn Spark Plug include misfiring of the engine and knocking reduced gas mileage, difficulty starting your INFINITI, random shut-offs, and difficulty accelerating. Each of these troubles can stop your vehicle from starting and driving efficiently. An old Spark Plug can also cause potential issues with many other engine components.

When installing a new Spark Plug, it's best to consult your INFINITI owner's manual for recommended replacement periods. Most Spark Plug service periods are advised at 30,000 miles.

Doing a Spark Plug replacement at home can be done but can be a little difficult as you may need to disassemble ignition cables, coils, wire plugs, and other vital INFINITI components. In effect, it's best to leave this work to professional technicians. But if you do choose to do the repairs yourself, refer to your owner's manual, confirm that your car is parked on a smooth surface, and disengage the battery before starting this process.

Each vehicle demands a specific Spark Plug made from proper material(s). Provide your engine with the care it deserves by replacing an old or broken Spark Plug with genuine OEM components from INFINITI Parts.

This Spark Plug, part 224011W616, is compatible with INFINITI QX4. Click on the What This Fits tab for additional fitment info.