• Part of your vehicle's intricate engine belt system
• Helps keep belt components properly aligned and coordinated for optimal performance
• Comes with an INFINITI-backed 12,000 mile/12 month limited warranty

You always want your INFINITI to run like a well-oiled machine. Sure, you like using all the latest technology and features that make your driving experience fun and effortless. But under the hood, your INFINITI still runs thanks to simple machines, like pulley and belt systems.

Your INFINITI Accessory Drive Belt Idler Pulley is vital for efficient engine operation, and should be removed and replaced immediately if it is cracked, old, or absent. While this tucked-away part may not seem important, a worn out Accessory Drive Belt Idler Pulley could cause further damage to the engine’s bracket mountings or drive belts. If your INFINITI has exhibited signs of diminished engine performance in recent days, visit your local INFINITI-authorized service center to find out if a component of your engine’s belt system, whether it’s the Accessory Drive Belt Idler Pulley or something else, could be causing a problem.

At INFINITI Genuine Parts, we think there is opportunity for innovative thinking in even the smallest parts of your car, and that’s why we always work to offer you the best replacement parts for every nook and cranny of your car. When you purchase a new Accessory Drive Belt Idler Pulley (part number 11925JK21A) with INFINITI directly, you can be assured that you’re purchasing the best-fitting part for your INFINITI. This part will fit the INFINITI GT-R 2009-2022. And, don’t forget: parts and accessories from INFINITI Genuine Parts come with a 12-month/12,000-mile (whatever happens first) limited warranty (if installed by dealer at the time of purchase).

For more information about vehicle fitment for the Accessory Drive Belt Idler Pulley on this page, consult the What This Fits section.