Subaru OEM Reserve Tank Cap Subaru WRX / STI / BRZ / Baja / Crosstrek / Forester / Impreza / Legacy / Outback | 45153AA000

Overview

The Genuine Subaru OEM Reserve Tank Cap (Part #45153AA000) is the factory-original coolant reservoir cap designed for Subaru models listed in Fitment & Compatibility below, including Baja, BRZ, Crosstrek, Forester, Impreza, Legacy, Outback, STI, Tribeca and WRX. This exact-fit OEM replacement ensures a proper seal on the coolant overflow/reserve tank, maintaining correct system pressure and preventing coolant loss. Choosing a genuine Subaru part guarantees the same quality, materials, and fit as the cap that came on your Subaru from the factory.

Key Features & Benefits

• Genuine Subaru OEM Quality – Manufactured to factory specifications, ensuring a perfect fit and reliable seal every time.
• Exact-Fit Design – Engineered specifically for Subaru reserve tanks across the models listed in Fitment & Compatibility below; no modifications or adapters required.
• Proper Pressure Retention – Maintains correct coolant system pressure to protect your engine from overheating and coolant loss.
• Durable Construction – Made from OEM-grade materials that resist heat, pressure, and coolant degradation for long service life.
• Factory Warranty Coverage – Backed by Subaru's genuine parts warranty for peace of mind.
• Direct OEM Replacement – Replaces worn, cracked, or missing reserve tank caps with the exact factory part.

What's Included

• 1x Genuine Subaru Reserve Tank Cap (Part #45153AA000)

Specifications

Fitment & Compatibility

This Genuine Subaru Reserve Tank Cap (45153AA000) is compatible with the following vehicles:

Always verify your vehicle's specific build date and VIN if you are unsure of compatibility. The reserve tank cap part number is consistent across many Subaru models, but confirm your vehicle uses this cap before ordering.

Installation

This is a simple, tool-free replacement. Remove the old or damaged reserve tank cap by turning it counterclockwise, then install the new cap by aligning it with the tank opening and turning clockwise until it locks into place. Ensure the cap is fully seated for a proper seal.