Subaru OEM Brake Booster Vacuum Hose (12-14 WRX) | 11861AA090

Overview

The Genuine Subaru OEM Brake Booster Vacuum Hose (Part #11861AA090) is the factory-original replacement hose designed to maintain proper vacuum pressure between your engine and brake booster. Built to exact Subaru specifications, this hose ensures your 2012–2014 Subaru WRX braking system performs with the same responsiveness and reliability it had from the factory. If your brake pedal feels spongy or your booster is not functioning correctly, a deteriorated vacuum hose is often the culprit — and only a genuine OEM replacement guarantees a perfect fit and lasting performance.

Key Features & Benefits

• Genuine Subaru OEM Quality — Manufactured to exact factory tolerances, ensuring the precise fit, function, and durability Subaru engineers intended.
• Exact-Fit Replacement — Designed specifically for the 2012–2014 Subaru WRX; no trimming, adapters, or modifications required.
• Maintains Proper Brake Booster Vacuum — Preserves the vacuum seal critical to full brake booster assist, keeping your stopping power strong and consistent.
• OEM-Grade Materials — Constructed from factory-spec rubber and materials engineered to resist heat, oil exposure, and under-hood degradation over time.
• Factory Warranty Coverage — Backed by Subaru's genuine parts warranty for peace of mind.
• Prevents Brake System Issues — A cracked or collapsed vacuum hose can cause a hard brake pedal, reduced braking performance, and check engine codes — replacing with OEM eliminates guesswork.

What's Included

• 1x Genuine Subaru Brake Booster Vacuum Hose — Part #11861AA090

Specifications

Fitment & Compatibility

This brake booster vacuum hose is a direct OEM replacement for the following Subaru vehicles:

Always verify your vehicle's VIN and existing part number against #11861AA090 before ordering to confirm fitment for your specific build date and configuration.

Installation

This is a straightforward bolt-on, clip-on OEM replacement that requires basic hand tools. The hose connects between the intake manifold vacuum port and the brake booster. Inspect the hose routing and any clamps or retaining clips during replacement. While many experienced DIYers can complete this repair at home, professional installation by a Subaru-certified technician is recommended if you are unfamiliar with brake system components. Always verify brake pedal feel and booster function after installation before returning the vehicle to normal operation.