FCS Q4005 Air Suspension Spring - Rear

FCS Q4005 Rear Air Suspension Spring

The FCS Q4005 is a rear air suspension spring for select BMW GT models. It is built for direct-fit replacement service on vehicles equipped with rear air suspension, helping restore proper ride support and suspension height control.

Key Features

• Rear air suspension spring for BMW applications
• Direct-fit replacement for select 2010-2017 BMW 535i GT, 535i GT xDrive, 550i GT, and 550i GT xDrive models
• Fits rear suspension positions only
• FCS brand part number Q4005
• Cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application

Fitment Details

• Fits 2010-2017 BMW 535i GT, rear.
• Fits 2011-2017 BMW 535i GT xDrive, rear.
• Fits 2010-2015 BMW 550i GT, rear.
• Fits 2010-2017 BMW 550i GT xDrive, rear.

What It Helps Address

• Rear suspension sag
• Uneven ride height at the back of the vehicle
• Air spring leakage or loss of air support
• Ride quality issues caused by a worn rear air spring

Installation Notes

Verify the vehicle’s year, model, and rear suspension configuration before installation. This part is specified for rear placement only and should be matched to the original air suspension setup on the vehicle. For BMW 535i GT and BMW 550i GT applications, confirm fitment against the VIN when possible.

Quality Assurance

FCS suspension components are cataloged for direct replacement use in the listed BMW applications. Part number Q4005 is identified for rear air suspension service on the covered GT models.