GMB 470-8540 Engine Timing Idler

Engine Timing Idler for Toyota and Lexus Applications

The GMB 470-8540 engine timing idler is manufactured to meet or exceed OEM specifications for dependable belt routing and timing system support. It is a direct-fit replacement for a wide range of Toyota and Lexus models, including Camry, Avalon, Sienna, Highlander, Solara, ES300, RX300, RX330, ES330, RX400h, and ES250 applications.

Built with a metal pulley and a serpentine & V-belt pulley design, this timing idler is made for consistent operation in engine timing and accessory drive systems. If you are replacing a worn idler on a Toyota Camry or Lexus RX330, GMB 470-8540 provides an OE-style service part for the correct application.

Key Features

• GMB 470-8540 engine timing idler for OE-style replacement
• Manufactured to meet or exceed OEM specifications
• Metal pulley construction for durability
• Serpentine & V-belt pulley type
• Single-groove pulley design
• Direct fit for many Toyota and Lexus engine applications

Detailed Product Overview

This timing idler is used in engine valve train and belt drive systems where stable pulley alignment is important. The metal pulley construction and single-groove profile support consistent belt tracking in applications that call for a timing idler with OE-level dimensions. Part number 470-8540 is listed across multiple Toyota and Lexus platforms, making it a practical replacement choice for service work on high-mileage vehicles.

This part cross-references Gates T42030 for the same application.

Common Problems This Part May Address

• Worn or noisy timing idler pulley
• Belt tracking issues caused by pulley wear
• Rough operation from a damaged metal pulley surface
• Service replacement for aging timing system components
• Restoration of proper belt routing in Toyota and Lexus engines

Installation Notes and Tips

• Verify engine application by year, make, and model before ordering.
• Inspect the belt path and surrounding components for wear during replacement.
• Confirm pulley alignment and smooth rotation before returning the vehicle to service.
• Use the vehicle service manual for torque and timing procedure details.
• Fits 2001-2010 Toyota Highlander, N/A.
• Fits 2006-2008 Lexus RX400h, N/A.
• Fits 1999-2008 Toyota Solara, N/A.
• Fits 2004-2006 Lexus ES330, N/A.
• Fits 2004-2006 Lexus RX330, N/A.
• Fits 1988-2006 Toyota Camry, N/A.
• Fits 1998-2006 Toyota Sienna, N/A.
• Fits 1995-2004 Toyota Avalon, N/A.
• Fits 1992-2003 Lexus ES300, N/A.
• Fits 1999-2003 Lexus RX300, N/A.
• Fits 1990-1991 Lexus ES250, N/A.

Quality Assurance

GMB manufactures this timing idler to meet or exceed OEM specifications, supporting consistent fit and function for Toyota and Lexus engine service. Part number 470-8540 is also listed as an interchange for 135030A010 and 4708540.