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Description
xOverview
The uxcell Idler Pulley is designed to support a broad range of Lexus and Toyota belt drive systems from 2004 through 2021. It functions as a tensioning or idle pulley, helping to maintain belt alignment and smooth operation under a variety of driving conditions. The part family includes several bolt replacement options and the 16604-31020 variant aligns with many popular configurations.
Designed with durability in mind, this pulley balances a robust bearing with either steel or thermoplastic construction to withstand everyday engine speeds and belt loads. It is built to stand up to long-term use while offering straightforward service as a direct replacement for your original equipment.
In real-world driving, a well-functioning idler pulley supports consistent belt tension as the engine cycles. With a quality uxcell part, you may experience smoother idle, quieter belts, and improved belt tracking, especially when paired with a new belt and other drivetrain components.
Key benefits you might notice
- Durable bearing engineered for typical engine speeds and belt loads
- Steel or thermoplastic construction for long life and consistent performance
- Easy direct replacement with standard mounting points
- Includes one idler pulley that matches the old equipment pulley
- Broad compatibility across Lexus ES, GS, RX and Toyota models such as Camry, RAV4, Sienna, Highlander, and more
Compatibility and installation notes
- Fits many listed models from 2004–2021, including Lexus and Toyota passenger and light-truck lines
- Check part numbers and bolt patterns to confirm fit, particularly variants in the 16604-31020 family (166040P010, 166040P011, 1660431010, 1660431020, 1660431030)
For best results during belt maintenance, inspect the drive belt and adjacent pulleys for wear and replace as needed. When installed correctly, this idler pulley can support smoother belt operation and quieter performance without guaranteeing specific outcomes. Always consult your vehicle service manual for torque specs and service intervals.
FAQ
Q: Which vehicles is this uxcell idler pulley compatible with?
A: Compatible with Lexus ES350/GS/IS/RX models and Toyota 4Runner, Camry, RAV4, Sienna, Highlander, Tacoma, and more from 2004–2021. Verify fit with part number 16604-31020.
Q: Is this an easy direct replacement?
A: Yes, it is designed as a direct replacement with standard mounting points for straightforward installation.
Shipping & Return
xReturns Policy
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Shipping
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
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