AISIN Timing Belt Kit TKT-021 with Water Pump for Lexus/Toyota V8 — Complete OE-Quality Service Kit

AISIN TKT-021 is a complete engine timing belt service kit that bundles an OE-quality water pump, timing belt, tensioner, pulleys, gaskets, and seals so you can replace all critical timing components in one job.

When you access the timing cover on many Lexus and Toyota V8 engines, replacing only a single worn part often means repeating the same labor later. The AISIN TKT-021 kit collects factory-equivalent components from recognized suppliers into a single box so you can complete the job once and avoid premature follow-up repairs. Each kit is assembled to match original equipment specifications and includes installation instructions to help ensure proper assembly.

How does this kit reduce future repair time and cost?

Replacing all timing-related components together eliminates duplicated labor and decreases the chance that a remaining old part will fail shortly after service. AISIN packages the water pump with a new belt, tensioner, and pulleys so all wear items are renewed at the same interval.

• Includes water pump, timing belt, tensioner, pulleys, gaskets, and seals in one kit
• OE-matched parts from trusted manufacturers reduce fitment surprises
• Single-service replacement prevents repeated labor for separate failures

What components are inside and are they OE equivalent?

The TKT-021 kit contains an AISIN water pump built with a diecast aluminum housing and durable internal components plus a timing belt and associated tensioning hardware. All parts are matched to original equipment specifications rather than generic substitutes.

• AISIN water pump with carbon ceramic-style sealing surfaces for improved wear life
• Mitsuboshi/Toyo/NTN and other OEM-grade belts and bearings included
• Seals, gaskets, and instructions provided for a complete install

Which Lexus and Toyota models does TKT-021 fit?

TKT-021 is compatible with a range of Lexus and Toyota models from late 1990s through the 2000s, but fitment depends on engine code and year. Always confirm compatibility with your vehicle’s engine and VIN using the fitment checker before purchase to ensure proper application.

• Lexus examples: GS400 (1998–2000), GS430 (2001–2007), GX470 (2003–2009)
• Also covers LS400, LS430, LX470, SC400, SC430 model years listed by manufacturer
• Toyota examples: 4Runner (2003–2009), Land Cruiser (1998–2007), Sequoia (2001–2009), Tundra (2000–2009)

Will the included water pump deliver long service life?

AISIN is a leading original equipment pump manufacturer and designs these pumps to meet the same dimensional and durability requirements as the factory unit. The pump uses a robust housing and premium seal materials intended to provide consistent coolant circulation when installed correctly.

• Diecast aluminum housing resists corrosion and warping under heat cycles
• Premium internal bearings and sealing surfaces help reduce leakage risk
• Packaged with new gaskets and seals to ensure a reliable seal at installation

Who is this for: The AISIN TKT-021 kit is aimed at owners and mechanics servicing select Lexus and Toyota V8 engines who want an OE-equivalent, all-in-one timing system refresh. It’s a practical option if you are performing a scheduled timing service, replacing a failed water pump, or preparing a high-mileage vehicle for long-term reliability. Verify exact engine fitment before ordering to ensure compatibility with your vehicle.