Description
Product Overview
The X AUTOHAUX serpentine belt idler pulley is engineered to replace noisy or worn factory pulleys on a range of Infiniti and Nissan models. Constructed from solid thermoplastic reinforced with metal inserts, the pulley offers excellent wear resistance, rust protection, and a lightweight design that reduces rotating mass. It measures 6.89 x 4.61 x 3.9 inches, weighs 1.21 pounds, and carries the OEM part numbers 11925-31U0C, 11929-31U03, 11947-31U05, among others, ensuring a perfect fit for VQ35DE 3.5L engines found in 2002‑2006 Altima SE, Murano, and Quest series. The included bolt and nut set (a23030800ux0787) simplifies installation, while the adjustable tensioner design maintains proper belt alignment and damping for long‑term reliability.
Usage
Designed for front‑engine, front‑wheel‑drive vehicles, this idler pulley is ideal for daily commuters, performance enthusiasts, and fleet operators who demand consistent belt performance. Install it during routine maintenance or when you notice squealing, belt wear, or reduced engine efficiency. The pulley’s robust construction tolerates the high‑temperature environment of the engine bay, making it suitable for both city driving and highway cruising. 
Why Choose Us
X AUTOHAUX combines decades of automotive expertise with rigorous quality control. Each pulley undergoes dimensional testing and material analysis to meet or exceed OEM specifications. Our thermoplastic formulation resists cracking and corrosion, extending service intervals compared with standard metal pulleys. Backed by a 4.4‑star rating from 61 verified customers and a best‑seller rank in the automotive replacement idler pulley category, you can trust the durability and performance of this component.
Key Features
- High‑grade thermoplastic core with metal reinforcement for superior wear and rust resistance.
- Exact OEM fit for Infiniti I30/I35 (1996‑2004) and Nissan VQ35DE 3.5L models (2002‑2007).
- Adjustable tensioner design maintains optimal belt tension and alignment.
- Reduces belt‑related noise and vibration for a smoother driving experience.
- Includes all necessary hardware – bolt, nut, and installation guide – for quick, hassle‑free replacement.
FAQ
Is this pulley compatible with my 2005 Nissan Altima?
Yes, the pulley fits Nissan Altima SE, SE‑R, and SL models equipped with the VQ35DE 3.5L engine, covering model years 2002‑2006.
Do I need special tools to install the idler pulley?
Standard hand tools such as a socket set and torque wrench are sufficient. The package includes a detailed installation guide to assist you.
How does the thermoplastic material improve durability?
Thermoplastic resists corrosion and maintains structural integrity under high engine bay temperatures, reducing the risk of cracking or deformation over time.
Can I replace the pulley myself?
Yes, the design is DIY‑friendly. Ensure the engine is cool, remove the old pulley, and install the new unit using the supplied hardware and torque specifications.
What warranty does X AUTOHAUX provide?
The pulley comes with a limited one‑year warranty covering manufacturing defects, giving you peace of mind on your purchase.
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