Subaru OEM Water Pump Pulley | 21151AA100

Overview

The Genuine Subaru OEM Water Pump Pulley (Part #21151AA100) is the factory-original replacement pulley designed for the Subaru models listed in the Fitment & Compatibility section below. As a direct OEM component, it ensures a precise fit and reliable performance within the engine's cooling system, maintaining proper belt tension and coolant circulation to protect your engine from overheating.

Key Features & Benefits

• Genuine OEM Quality – Manufactured to Subaru's exact factory specifications, ensuring a perfect fit and long-term durability with no modifications required.
• Exact-Fit Replacement – Engineered specifically for the Subaru models listed in the Fitment & Compatibility section below, eliminating guesswork and compatibility concerns.
• Factory Warranty Coverage – Backed by Subaru's OEM parts warranty, providing peace of mind with every purchase.
• Proper Belt Alignment – Maintains correct serpentine belt tension and alignment to protect the water pump and surrounding components from premature wear.
• Cooling System Integrity – Works in harmony with the OEM water pump to ensure consistent coolant flow and engine temperature regulation.
• Corrosion-Resistant Construction – Built with factory-grade materials to withstand the thermal and mechanical stresses of daily and performance driving.

What's Included

• 1x Genuine Subaru OEM Water Pump Pulley (Part #21151AA100)

Specifications

Fitment & Compatibility

This Genuine Subaru OEM Water Pump Pulley is confirmed to fit the following vehicles:

2013-2020 Subaru BRZ

2013-2017 Subaru Crosstrek

2011-2018 Subaru Forester

2012-2016 Subaru Impreza

2013-2019 Subaru Legacy

2013-2019 Subaru Outback

Always verify your vehicle's part number in your owner's manual or with a Subaru parts diagram to confirm fitment before ordering.

Installation

The Subaru OEM Water Pump Pulley (21151AA100) is designed as a direct bolt-on replacement for the factory unit. Installation typically involves removing the serpentine belt and unbolting the existing pulley from the water pump hub. While a mechanically experienced DIYer may be able to complete this job at home, professional installation by a certified Subaru technician is recommended to ensure proper belt tension and torque specifications are met.