Description
Product Overview
The National Automatic Transmission Output Shaft Seal is engineered to meet OEM specifications for Toyota Sienna vehicles spanning model years 1999 through 2016. Constructed from high‑grade rubber and reinforced with a steel backing, the seal offers superior resistance to heat, pressure, and fluid leakage. Dimensions of 2.75 x 2.75 x 0.69 inches ensure a direct, bolt‑for‑bolt replacement, while the 0.96‑ounce weight reflects a lightweight yet robust design. Packaged in original National branding, the seal arrives with all necessary hardware for a hassle‑free installation.
![[Product front view showing all components]](https://www.riverstore.store/wp-content/uploads/2026/06/1454f4aebace4851a12829d2cf159bde.jpg)
Usage
Designed for both professional mechanics and DIY enthusiasts, this seal fits seamlessly into routine transmission service intervals or emergency leak repairs. Ideal for daily commuters, fleet vehicles, and long‑haul drivers, it restores proper oil pressure and prevents contamination of transmission internals. The seal performs reliably in diverse climates, from hot summer roads to cold winter conditions, making it a versatile choice for any Sienna owner.
Why Choose Us
National is a trusted name in automotive components, and this output shaft seal upholds that reputation with rigorous quality testing and strict adherence to OEM tolerances. Each unit is inspected for dimensional accuracy and material integrity, guaranteeing a leak‑free fit. Our commitment to genuine parts means you receive a component that matches the original equipment in performance and durability, backed by a responsive customer support team ready to assist with fitment questions.
Key Features
- Exact OEM dimensions ensure a perfect, hassle‑free installation.
- High‑grade rubber with steel reinforcement resists heat and pressure.
- Prevents transmission fluid leaks, protecting engine components.
- Lightweight design simplifies handling without sacrificing durability.
- Includes original packaging, hardware, and access to dedicated support.
FAQ
Will this seal fit my 2014 Toyota Sienna?
Yes, the seal is compatible with Toyota Sienna models from 1999 through 2016, including the 2014 year.
Do I need additional tools to install the seal?
The seal comes with the necessary hardware, and standard transmission tools are sufficient for installation.
Is this a genuine National part?
Absolutely. This is a genuine National OEM component, ensuring the same quality as the original equipment.
What is the warranty on this seal?
National offers a limited warranty covering manufacturing defects for a period of 12 months from the date of purchase.
Can I install the seal myself?
Yes, the seal is designed for both professional and DIY installation. Follow the included instructions and ensure proper torque specifications for optimal performance.
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