OEM Lower Smooth Idler Pulley for the 2010-2024 Toyota 4Runner models equipped with the 4.0L V6 powertrain.
This idler pulley is located between the crankshaft pulley and the A/C Compressor, found directly below the belt tensioner on the V6. The Idler Pulley is responsible for guiding and maintaining tension with the drive belt. As the bearings in the pulley wear, you may begin to experience a high-pitched squeaking or squealing. Over time, this may result in complete bearing failure, causing the pulley to lock up and break the belt.
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