Subaru OEM CVT Cooler Hose (15-19 Legacy - 25B) | 99078AB521

Overview

The Genuine Subaru OEM CVT Cooler Hose (Part #99078AB521) is an exact-replacement transmission cooling hose designed specifically for 2015–2019 Subaru Legacy models equipped with the CVT (Continuously Variable Transmission). This factory-original hose ensures proper coolant flow to your CVT, maintaining optimal transmission temperatures and protecting long-term drivetrain reliability. If your CVT cooler hose is cracked, leaking, or aging, replacing it with a genuine OEM part guarantees a perfect fit and factory-level performance.

Key Features & Benefits

• Genuine Subaru OEM Quality — Manufactured to Subaru's exact factory specifications, ensuring perfect fitment and reliable performance with no modifications required.
• Exact-Fit Replacement — Engineered specifically for 2015–2019 Subaru Legacy CVT applications, eliminating guesswork and compatibility issues common with aftermarket parts.
• CVT Transmission Protection — Maintains proper coolant circulation through the CVT cooler circuit, preventing overheating and protecting your transmission from premature wear.
• Durable OEM-Grade Materials — Constructed from the same heat- and pressure-resistant materials used on the original assembly line, built to withstand the demands of daily driving.
• Factory Warranty Coverage — As a genuine Subaru part, this hose qualifies for Subaru's OEM parts warranty for added peace of mind.
• Direct OEM Cross-Reference — Part number 99078AB521 matches Subaru's official parts catalog for the 25B specification designation on applicable Legacy trims.

What's Included

• 1x Genuine Subaru CVT Cooler Hose — Part #99078AB521

Specifications

Fitment & Compatibility

This CVT cooler hose is confirmed to fit the following Subaru vehicles. Always verify your VIN and trim level before ordering to ensure correct application.

Note: Fitment applies to CVT-equipped Legacy trims only. Confirm applicability using your vehicle's VIN or consult a Subaru dealer parts department if unsure.

Installation

This CVT cooler hose is a direct OEM replacement designed for straightforward installation. However, because the job involves the CVT cooling circuit, it may require draining coolant or transmission fluid depending on the specific hose routing. Professional installation by a certified Subaru technician is recommended to avoid introducing air into the cooling system or damaging adjacent CVT components. Always follow Subaru factory service procedures when working on CVT-related components.