The Idler Pulley (part number 31258136) is an essential component of the serpentine belt system in vehicles. Located in the front engine compartment, this pulley plays a crucial role in maintaining proper tension on the serpentine belt, which drives various auxiliary components such as the alternator, power steering pump, and air conditioning compressor. By ensuring the belt is tightly aligned and operating smoothly, the idler pulley contributes to the overall efficiency and longevity of the vehicle’s engine.

Key Features:

1. Durable Construction:
   This idler pulley is built from high-quality materials designed to withstand the harsh conditions of the engine compartment, including high temperatures and heavy loads, ensuring long-lasting performance.

2. Optimal Tensioning:
   The idler pulley maintains the appropriate tension on the serpentine belt, ensuring that engine accessories like the alternator, power steering, and air conditioning systems function properly.

3. Friction Reduction:
   Equipped with high-performance bearings, the pulley reduces friction between the belt and pulley surface, which minimizes wear and enhances the efficiency of the entire belt system.

4. Easy Installation:
   The idler pulley is designed for quick and easy installation, fitting perfectly into the vehicle's serpentine belt system without the need for additional modifications.

5. Noise Reduction:
   This part is engineered to reduce noise during operation, offering a smoother and quieter engine performance compared to other pulleys on the market.

6. High-Quality Materials:
   The pulley is made from durable, heat-resistant materials that can endure temperature fluctuations, wear, and corrosion, ensuring a longer lifespan and reliable performance.

Installation Location:

The Idler Pulley is located in the front section of the engine bay, typically near the serpentine belt tensioner. It works alongside the tensioner to keep the belt properly aligned and taut.

Compatible Models:

• S60 (2008-2016)
• V60 (2012-2016)
• XC60 (2008-2016)
• S80 (2008-2016)
• V70 (2008-2016)
• XC70 (2008-2016)
• XC90 (2008-2016)

This idler pulley is a perfect replacement for worn-out or damaged pulleys, helping to maintain the proper functioning of the engine’s accessory drive systems. It ensures smooth operation of critical engine components while reducing wear on the serpentine belt system.