Details

• Brand:

  

  

• SKU:

  AL8Z-8678-AA

• Positions: Lower, Rear
• Other Names:

  Serpentine Idler Pulley, Idler Pulley, ys356

• Description:

  This genuine Ford idler pulley is the accessory drive belt idler for the 2009-2012 Ford Escape and Ford Fusion and their Mercury Mariner and Mercury Milan counterparts, cataloged by Ford under the Pulley base and also referenced as Motorcraft YS-356. The idler is a smooth, flanged pulley riding on a sealed bearing that routes and guides the serpentine accessory drive belt around the front of the engine, keeping the belt properly aligned and tensioned as it drives the alternator, water pump, power steering, and air conditioning compressor. Because it spins continuously whenever the engine runs, the sealed bearing eventually dries out, and the pulley develops noise, roughness, or wobble. A buyer searching for this part is typically hearing a chirp, squeal, grinding, or rumbling noise from the front of the engine that changes with engine speed, has found a seized or wobbling pulley, or is doing preventive maintenance along with a belt replacement. Fitting this correct factory idler restores quiet, true belt tracking and reliable accessory drive so the belt does not slip or throw. Inspect the drive belt, tensioner, and the other pulleys while the belt is off, since a worn bearing on one component often accompanies wear elsewhere in the accessory drive. Confirm the accessory belt routing and engine application for your Escape, Fusion, Mariner, or Milan before installation so the idler and its mounting match your setup.

• Replaces:

  9l8z8678a, al8z8678a

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