• 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

Your INFINITI spark plugs can be found in a straight line on the side or top of your vehicle's engine. Initially, a Spark Plug looks somewhat like a long, oddly-shaped screw. In reality, this essential component plays a significant role in your car's ability to function. If your Spark Plug becomes so damaged that it stops working correctly, your INFINITI probably won't run.

Spark plugs work with your engine to convert fuel into actionable energy so that you're able to enjoy a smooth start and journey in your INFINITI. So how does this happen? Your Spark Plug generates an electrical spark that ignites the extremely combustible mixture of fuel and air in your INFINITI's combustion chamber, generating the energy needed to power your INFINITI as it drives down the road. Without a properly functioning Spark Plug, the power your vehicle needs to ignite your fuel and turn it into actionable energy decreases, which can lead to significant concerns.

A Spark Plug needs periodic inspection and servicing, just like motor oil and tires on your vehicle. If your Spark Plugs are neglected for too long, you may start to experience several issues. Potential signs of an old or worn Spark Plug are misfiring of the engine and knocking lower gas mileage, difficulty starting your INFINITI, spontaneous shut-offs, and acceleration issues. Each of these issues can stop your vehicle from starting and driving efficiently. An old Spark Plug can also cause potential issues with many other engine parts.

When it comes to replacing your Spark Plug, we recommend that you read over your owner's manual for scheduled replacement recommendations. Most Spark Plug service guidelines are suggested at 30,000 miles.

Replacing a Spark Plug at home can be done but can prove a bit complicated since it may be required that you disassemble your INFINITI's ignition cables, plug wires, coils and other vital INFINITI components. In effect, it's best to leave this job to INFINITI experienced professionals. Should you prefer to do the Spark Plug replacement yourself, read over your owner's manual, make sure that your vehicle is in Park on a steady, flat surface, and disengage your battery before beginning the installation.

Each vehicle requires a specific Spark Plug designed with the appropriate materials. Provide your engine with what's needed by replacing a worn out Spark Plug with authentic OEM parts from INFINITI Parts.

This Spark Plug 224015M015 fits INFINITI FX35 2003-2008, INFINITI FX45 2003-2008, INFINITI G35 2003-2007, INFINITI I35 2002-2004, INFINITI M35 2006-2010, INFINITI M45 2003-2010, INFINITI Q45 2002-2006, INFINITI QX4 2001-2003, or INFINITI QX56 2004-2006. Consult the What This Fits tab for additional fitment info.

Fits FX35, FX45, G35, I30, I35, M35, M45, Q45, QX4, QX56