Details

• Brand:

  

• SKU:

  4891720AA

• Other Names:

  04891720aa, Pulley

• Description:

  Smooth. Backside idler.

  The Silent Partner in Your Engine’s Performance
  Your accessory drive system relies on perfect tension and alignment to power your alternator, water pump, and AC compressor. When an idler pulley begins to fail, it creates more than just an annoying squeal—it threatens to strand you with a snapped belt. The Genuine Mopar Idler Pulley (4891720AA)
   is an enhanced, professional-grade solution designed to replace older, failure-prone flat designs with superior stability and silent rotation.
  Why Professionals Choose the Enhanced Mopar Idler:

  • Advanced Bearing Protection: Engineered with premium L435 grease and a Gen 2 ACM triple-lip, non-vented seal, this pulley is built to lock out moisture and road salt. This high-level shielding prevents the "white etching" and internal pitting that cause premature bearing failure in budget aftermarket versions.
  • Whisper-Quiet Operation: Featuring a precision-machined smooth surface, this backside idler is designed to reduce harmonic vibration. It eliminates the "hoot" and grinding noises common in lower-quality parts, restoring the original refinement of your vehicle’s engine bay.
  • High-Impact Nylon Construction: Crafted from 70mm premium nylon, this pulley is engineered for extreme thermal stability. It resists warping and melting under high-load conditions that can cause generic plastic pulleys to crack or shed their belts.
  • Zero-Modification Fitment: This is a direct OEM replacement that utilizes your existing factory hardware. Because it is built to the exact millimeter-perfect dimensions of your original equipment, there is no guesswork, no rattling, and no need for "universal" spacers.

  The Professional Difference
  We provide factory-sealed, brand-new Mopar components that are rigorously tested to meet Stellantis' highest quality standards. By choosing the Genuine 4891720AA, you are investing in a part designed to significantly reduce warranty issues and engine noise while extending the life of your serpentine belt.
  Maintain your vehicle’s rhythm with the only pulley engineered for the long haul.

  
  

• Condition: New
• Notes: Engines: 3.8l v6 smpi engine. All 5.7L 8Cyl Gas Engines. 3.5l v6 high output 24v mpi engine. 3.3l v6 ohv engine. 3.8l v6 ohv engine. 4.0l v6 sohc engine. 5.7l v8 hemi cng engine. 5.7l v8 hemi vvt engine. 6.4l heavy duty v8 hemi with mds. 5.7l hemi vct engine. 5.7l v8 hemi mds vct engine. 5.7l v8 hemi mds vvt engine. 6.1l v8 srt hemi engine. 5.7l hemi vct engine. 5.7l v8 hemi mds vct engine. 6.4l srt hemi smpi v8 engine. 6.4l v8 srt hemi engine. 5.7l v8 hemi mds vvt engine. 5.7l v8 hemi vvt engine. 6.2l supercharged hemi v8 srt engine. 6.2l v8 supercharged ho engine. 6.4l v8 srt hemi engine. 6.4l v8 srt hemi mds engine.
• Applications: R/T. Max AWD. Plus AWD. Night 4x4. Road & Track. Summit 4x2. Summit 4x4. Alpine 4x4. Yellow Jacket. Red Vapor 4x4. 392 Hemi Shaker. X 70th Anniversary 4x2. X 70th Anniversary 4x4. 25th Anniversary Edition. 100th Anniversary Edition. 7-Passenger. 7-Passenger AWD. 2-Door 4x4. 4-Door 4x2. 4-Door 4x4. 4-Door 4x2. 4-Door 4x4. 4-Door 4x4 RHD. 42 4-Door. 44 2-Door. 44 2-Door RHD. 44 4-Door. 5-Passenger 4x2. 5-Passenger 4x4. 7-Passenger 4x2. 7-Passenger 4x4. 4x2. 4x4. 75th Anniversary Edition 4x2. 75th Anniversary Edition 4x4.
• Replaces:

  68061368aa

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