Your INFINITI engine relies on a variety of intricate, connected parts that support the signature INFINITI ride you know and love. Some parts are linked by a series of belts, and one of the most important belts is the Serpentine Belt.

Your INFINITIs Serpentine Belt is a strong, continuous belt that transfers power to the A/C compressor, power steering pump, alternator, and, sometimes, water pump. Sometimes the Serpentine Belt is called an accessory belt because it powers the peripheral devices in your INFINITI engine. But, dont underestimate its importance.

Serpentine Belts are generally made of tough-but-flexible rubber engineered to withstand the friction and heat involved in transporting power from one engine component to the other. However, like any other part, they are subject to wear and tear.

Serpentine Belts can tear or crack with age, or they can malfunction if they become soaked due to coolant or oil leaks. They can also lose alignment, slip, or lack tension, because of malfunctioning tensioning systems, which may necessitate Serpentine Belt and tensioner replacements, or re-adjusting the belt, depending on its condition. Common signs of Serpentine Belt issues include: engine rattling noises, lackluster A/C or power steering performance, engine sweltering, and visible cracks or wear on the belt.

In general, your INFINITI Serpentine Belt can last many thousands of miles, but its life can be cut short due to lack of maintenance, oil leaks, and other issues. Its a good idea to inspect your Serpentine Belt during every oil change, or get a professional inspection from an INFINITI service center in your area.

The Serpentine Belt replacement procedure is dependent on the tensioner mechanism in your INFINITI. Consult with an expert technician or your INFINITI manual before DIY-ing any services!

Without a doubt, youll need a Serpentine Belt thats designed-to-fit your model and year, and a belt tensioner tool. Note that if your INFINITI relies on a manual or hydraulic tensioner for the Serpentine Belt, visiting your nearest INFINITI service center is advisable.

When youre ready to get started, take pictures of the placement of your current Serpentine Belt and of how it intertwines with other engine components. Then, detach the tensioner using a ratchet and gently unwind the Serpentine Belt, taking care not to mess with any accessories.

Once youve undone the old belt, check it for signs of oil leaks, cracks, and damage to identify any other issues that may not be resolved by just replacing the belt! Re-wind the new Serpentine Belt in the old ones place and re-activate the tensioner, using a wrench to tighten it to the appropriate level. Lastly, crank the engine and allow it to idle while inspecting its operation to ensure it runs smoothly.

Whether you choose to replace the Serpentine Belt yourself or get professional replacement services at your local INFINITI service center, having the right INFINITI part is essential. Find genuine Serpentine Belt replacements for your INFINITI QX56 2004-2010. See the What This Fits tab for more details.

Fits QX56