ADT39655 Blue Print Idler Pulley

This pulley is pretty straightforward. It's basically a wheel that the serpentine belt wraps around. Its job is to guide the belt and maintain tension as it goes around all the different components – your alternator, power steering pump, air conditioning compressor, and so on. It doesn’t drive anything itself, it just makes sure the belt stays on the right path and with the right amount of pull. It has a screw built in, so you don’t have to worry about sourcing that separately. Think of your serpentine belt as the power delivery system for a lot of important engine functions. The idler pulley is part of that system. It’s positioned strategically to help the belt route around everything smoothly. It helps prevent the belt from flapping or getting misaligned, which could lead to noise or worse. If this pulley goes bad, you’ll notice it. A failing idler pulley will often make a whining or chirping sound, especially when you first start the car or when you put a load on the engine—like turning on the AC. It can also cause the belt to wear out faster. A seized pulley can actually snap the serpentine belt completely, and that’ll leave you stranded, because your battery won’t charge, you’ll lose power steering, and your AC will stop working. It's a relatively inexpensive part, and replacing it is a good way to prevent bigger problems down the road. We carry a lot of these at Fixparts Online, and they’re generally pretty easy to swap out if you’re comfortable doing a little DIY work. We’ve got your back: Idler Pulley for Serpentine Belt with Screw (MPN ADT39655) is covered for 12 months!

About Blue Print

Blue Print is a leading provider of precision replacement parts from Germany, ensuring quality and exact fit for various vehicles. Based in Germany, Blue Print emphasizes innovation and superior craftsmanship.

Why Choose Blue Print?

• We offer a huge range of parts for European cars – everything from AdBlue tanks to wheel bearings. • Blue Print parts are made to the same standards as original equipment, so you know they’ll fit and work well. • We’re trusted by garages and car owners across the country for quality and reliability. • You get great value for your money – top quality parts at a competitive price. Blue Print – trusted quality, available at FixParts Online!