Subaru OEM Water Pump Legacy / Outback 2010-2019 | 21110AA511

Overview

The Genuine Subaru OEM Water Pump (Part #21110AA511) is the factory-original cooling system component designed for 2010–2019 Subaru Outback and Legacy models equipped with the 2.5L SOHC naturally aspirated engine. Engineered to Subaru's exact specifications, this OEM water pump ensures proper coolant circulation, optimal engine temperature regulation, and long-term reliability — making it the ideal choice for owners who demand a perfect, no-compromise fit and factory-level performance.

Key Features & Benefits

• Genuine Subaru OEM Quality — Manufactured to the same factory standards as the original pump, ensuring exact fit and reliable performance every time.
• Exact-Fit Replacement — Engineered specifically for 2010–2019 Subaru Outback and Legacy 2.5L SOHC applications; no modifications or adapters required.
• Optimal Coolant Flow — Maintains consistent coolant circulation to prevent overheating and protect your engine under all driving conditions.
• OEM-Grade Seal & Impeller — Factory seals and impeller design minimize the risk of leaks and cavitation for a longer service life compared to aftermarket alternatives.
• Factory Warranty Coverage — Backed by Subaru's genuine parts warranty, giving you peace of mind with every installation.
• Direct OEM Cross-Reference — Replaces part number 21110AA510; cross-reference your current pump before ordering to confirm fitment.

What's Included

• 1x Genuine Subaru OEM Water Pump (Part #21110AA511)

Specifications

Fitment & Compatibility

This Genuine Subaru OEM Water Pump is compatible with the following vehicles. Verify your engine code and trim before ordering.

2010-2019 Subaru Legacy

2010-2019 Subaru Outback

Note: This part is intended for naturally aspirated 2.5L engines. It does not fit turbocharged (WRX/STI) variants. Always confirm your VIN or engine designation before purchase.

Installation

Water pump replacement on the 2010–2019 Subaru Outback and Legacy typically involves draining the cooling system, removing the timing belt cover, and replacing the pump in conjunction with the timing belt service — a job commonly recommended at the same interval (typically 105,000 miles). Professional installation is strongly recommended. Consult your Subaru factory service manual or a certified Subaru technician for torque specifications and proper coolant refill procedures.