Toyota Idler Pulley 16604-31020 4Runner Tacoma Camry Highlander Lexus OEM
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VERIFY COMPATIBILITY BEFORE PURCHASETo ensure this idler pulley fits your specific vehicle and avoid costly returns, please message us your VIN number before purchasing. Our technical team will verify exact fitment within 24 hours. Some engines use 2 idler pulleys - let us confirm the correct quantity for your vehicle! |
🔧 Product Overview
| Part Number: | 16604-31020 |
| Supersedes: | 16604-31010 |
| Replaced By: | 16604-0P011 (current revision - same application) |
| Condition: | Brand New - 100% Genuine Toyota OEM |
| Type: | Drive Belt Idler Pulley Sub-Assembly No.2 |
| Position: | Left Upper / Right Upper (engine dependent) |
| Quantity: | Sold Individually (some vehicles require 2 - verify before ordering) |
| Origin: | Genuine Toyota OEM - Factory Sealed |
✅ Vehicle Compatibility
| Year | Make | Model | Engine |
|---|---|---|---|
| 2003-2024 | Toyota | 4Runner | 4.0L V6 1GR-FE |
| 2005-2015 | Toyota | Tacoma | 2.7L I4 / 4.0L V6 |
| 2007-2014 | Toyota | FJ Cruiser | 4.0L V6 1GR-FE |
| 2005-2014 | Toyota | Tundra | 4.0L V6 1GR-FE |
| 2007-2017 | Toyota | Camry | 3.5L V6 2GR-FE |
| 2008-2017 | Toyota | Highlander | 3.5L V6 2GR-FE |
| 2006-2012 | Toyota | Avalon | 3.5L V6 2GR-FE |
| 2006-2012 | Toyota | RAV4 | 3.5L V6 2GR-FE |
| 2007-2017 | Toyota | Sienna | 3.5L V6 2GR-FE |
| 2009-2015 | Toyota | Venza | 3.5L V6 2GR-FE |
| 2007-2012 | Lexus | ES350 | 3.5L V6 2GR-FE |
| 2007-2015 | Lexus | RX350 | 3.5L V6 2GR-FE |
| 2006-2015 | Lexus | IS250 / IS350 | 2.5L V6 / 3.5L V6 |
| 2007-2011 | Lexus | GS350 / GS450h | 3.5L V6 2GR-FSE |
⚡ Note: Vehicles with the 4.0L 1GR-FE engine (4Runner, Tacoma, FJ Cruiser, Tundra) typically use 2 of this idler pulley. Vehicles with the 3.5L 2GR-FE engine use 1. Message us with your VIN to confirm the correct quantity for your vehicle.
Why Choose 100% Genuine Toyota OEM Parts?
✓ Precision Bearing QualityOEM idler pulleys feature sealed, application-specific bearings designed for the exact speed and load requirements of your engine's accessory drive system. Aftermarket pulleys often use generic bearings that fail prematurely. ✓ Eliminates Belt Noise & VibrationA worn idler pulley causes squealing, chirping, and belt vibration. The OEM replacement restores smooth, quiet operation exactly as Toyota engineered it from the factory. ✓ Protects Critical Engine SystemsThe idler pulley maintains proper tension on the serpentine belt that drives your alternator, A/C compressor, power steering pump, and water pump. A failed pulley can disable all these systems at once. |
✓ Exact OEM DimensionsManufactured to exact Toyota specifications for diameter, bore, and belt tracking. Aftermarket pulleys with even slight dimensional variations can cause belt misalignment, premature wear, and failure. ✓ Plug-and-Play InstallationDirect bolt-on replacement - no modifications or adapters needed. OEM pulleys include the correct dust shield configuration for your specific application, eliminating guesswork. ✓ Factory Warranty & SupportBacked by Toyota's 12-month warranty and our technical support team. We help verify compatibility and confirm the correct quantity for your specific vehicle before you buy. |
📋 Important Information
✓ 100% Genuine Toyota OEM Part
This is NOT an aftermarket reproduction. Identical to parts sold at Toyota and Lexus dealerships. Factory sealed packaging included.
⚙️ Replace Belt, Tensioner & Idler Pulleys Together
Toyota recommends replacing the serpentine belt, tensioner assembly, and all idler pulleys at the same time. These components share the same service life and replacing them together prevents repeat failures and labor costs.
🔍 Verify Quantity Needed
This listing is for ONE (1) idler pulley. Vehicles with the 4.0L 1GR-FE engine (4Runner, Tacoma, FJ Cruiser, Tundra) typically require 2 pulleys. Contact us with your VIN to confirm the correct quantity and related part numbers for your specific vehicle.
🏢 About ToyotAuto Parts
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Our mission is simple: provide authentic, factory-quality parts at competitive prices with technical support you won't find elsewhere. Every part we sell comes directly from Toyota's authorized supply chain - no knockoffs, no compromises.
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Questions? Need Fitment Verification?
Message us your VIN number and vehicle details - our technical team responds within 24 hours.
We're here to ensure you get the right part the first time!
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