FCS Q4012 Air Suspension Spring - Rear

Rear Air Suspension Spring for Hummer H2

FCS Q4012 is a rear air suspension spring for select Hummer H2 applications. It is built for 2003-2009 Hummer H2 models with rear air spring fitment, making it a direct-match replacement for the original suspension component.

Key Features

• Rear air suspension spring for the Hummer H2
• Fits 2003-2009 Hummer H2, rear
• FCS Q4012 replacement part number
• Supports air-suspension ride height and load control
• OE-style fitment for the listed application

Detailed Description

FCS Q4012 is an air suspension spring designed for the rear position on 2003-2009 Hummer H2 vehicles. If you are replacing a worn or leaking rear air spring, this part provides the correct fitment for the listed application and helps restore the vehicle’s suspension function. Search terms such as rear air suspension spring for Hummer H2, FCS Q4012 rear air spring, and 2003-2009 Hummer H2 rear suspension replacement all point to this exact application.

FCS is the brand line identified for this part, and Q4012 is the catalog reference to use when matching the rear air spring for the Hummer H2. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What It Helps Fix

• Rear end sag from a worn air spring
• Air leaks that reduce suspension support
• Uneven ride height at the rear of the vehicle
• Harsh or unstable rear suspension response
• Loss of load-leveling performance

Installation Notes and Tips

Fits 2003-2009 Hummer H2, rear. Confirm the vehicle’s rear air suspension configuration before ordering and compare the original part number, mounting points, and air line connection style to the removed component. After installation, inspect the system for leaks and verify proper ride height operation.

Quality Assurance

FCS Q4012 is cataloged for the specified rear Hummer H2 application and should be matched to the vehicle’s year, make, model, and position before installation.