Aisin BTT-504 Engine Timing Belt Tensioner Hydraulic Assembly

Aisin BTT-504 Hydraulic Timing Belt Tensioner

The Aisin BTT-504 is an engine timing belt tensioner hydraulic assembly for select Toyota and Lexus applications. It is OE manufactured to maintain consistent pressure across the RPM range, helping support stable timing belt operation in the vehicles listed below.

Key Features

• Hydraulic timing belt tensioner assembly for engine valve train service
• OE-manufactured construction for pressure control across the RPM range
• Direct-fit application for select Toyota Highlander and Lexus RX400h models
• Part number BTT-504 for easy identification and ordering
• Cross-reference: this part matches SKF TBT71004 for the same application

Detailed Description

Built for the engine timing system, the Aisin BTT-504 hydraulic tensioner helps maintain proper belt tension as engine speed changes. That matters on the 2006-2010 Toyota Highlander and 2006-2008 Lexus RX400h, where consistent timing belt control is critical to valve train operation. This part cross-references SKF TBT71004 for the same application. Search terms such as Toyota Highlander timing belt tensioner hydraulic assembly BTT-504 and Lexus RX400h engine timing belt tensioner BTT-504 align with this OE-style replacement.

What It Helps Address

• Timing belt slack caused by a worn hydraulic tensioner
• Irregular belt tension during engine speed changes
• Noise from a weakened timing belt tensioning system
• Service replacement for a leaking or fatigued tensioner assembly
• Restoration of proper timing belt control during valve train maintenance

Installation Notes and Tips

Verify engine fitment by year and model before installation. Fits 2007-2010 Toyota Highlander, N/A. Fits 2006 Toyota Highlander, N/A, from 06/2005. Fits 2007-2008 Lexus RX400h, N/A. Fits 2006 Lexus RX400h, N/A, from 06/2005. Replace the timing belt system components according to the vehicle service procedure and confirm correct belt routing and tension after installation.

Quality Assurance

Aisin supplies OE-manufactured components engineered for consistent performance in the timing system. Part number BTT-504 is built to meet the demands of the listed Toyota Highlander and Lexus RX400h applications.