INA ZT-9489 Engine Timing Belt Tensioner Hydraulic Assembly

Engine Timing Belt Tensioner for Toyota and Lexus

INA ZT-9489 is an engine timing belt tensioner hydraulic assembly for select Toyota and Lexus V8 applications. It supports stable timing drive operation by maintaining proper belt tension and gear ratio control in the valve train.

Key Features

• Engine timing belt tensioner hydraulic assembly for timing drive service
• Supports consistent power transmission in belt-driven valve train systems
• Built for select Lexus SC430, GX470, GS430, LS430, LS400, SC400, LX470 and Toyota 4Runner, Sequoia, Tundra, Land Cruiser applications
• INA part number ZT-9489 for direct reference during ordering and service lookup
• Cross-references part number 5330111100 for the same application

Detailed Description

INA ZT-9489 is a timing belt tensioner hydraulic assembly used in the engine valve train to help maintain correct belt tension and timing drive alignment. It is listed for 1990-2010 Lexus and Toyota models, including Lexus SC430, GX470, GS430, LS430, LS400, SC400, LX470 and Toyota 4Runner, Sequoia, Tundra, and Land Cruiser. For technicians servicing a Toyota Tundra timing belt tensioner hydraulic assembly or a Lexus LX470 timing drive repair, this part provides a direct replacement reference for the specified applications.

What It Helps Address

• Timing belt slack or inconsistent belt tension
• Noisy timing drive operation from a worn hydraulic tensioner
• Incorrect valve timing caused by tension loss
• Service replacement during timing belt maintenance
• Wear-related timing drive instability in high-mileage engines

Installation Notes and Tips

Replace the tensioner during timing belt service and verify all timing marks before engine start-up. Inspect related belt drive components, pulleys, and seals for wear while the system is open. Confirm application by year, make, and model before installation; this part is listed for multiple Lexus and Toyota V8 platforms, including Lexus GS430 and Toyota Land Cruiser applications. Part number ZT-9489 should be matched to the vehicle’s original timing drive specification.

Quality Assurance

INA supplies repair solutions for chain and belt drive components with an emphasis on correct gear ratios, reliable operation, and low maintenance requirements. ZT-9489 is built for timing drive service where stable hydraulic tension control is required.