FCS Q4006 Air Suspension Spring - Rear

Rear Air Suspension Spring for BMW xDrive

The FCS Q4006 is a rear air suspension spring for select BMW xDrive models with auto leveling. It is built for 2006-2010 BMW 530xi, 535xi, and 535i xDrive applications that use a rear air spring setup. Use FCS Q4006 when replacing a worn rear air suspension spring on the specified BMW fitments.

Key Features

• Rear air suspension spring for BMW applications with auto leveling
• Direct fitment for select 2006-2010 BMW 530xi, 535xi, and 535i xDrive models
• Supports rear suspension height control on equipped vehicles
• FCS brand line replacement part
• Part number Q4006 for catalog and fitment lookup

Detailed Description

FCS Q4006 is an air suspension spring made for the rear position on specific BMW xDrive vehicles equipped with auto leveling. Compatible applications include 2006-2007 BMW 530xi rear, 2008 BMW 535xi rear, and 2009-2010 BMW 535i xDrive rear. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application. If you are searching for a rear air suspension spring for BMW 535i xDrive with auto leveling or a rear air spring for BMW 530xi and 535xi models, Q4006 matches the listed fitment.

Common Replacement Reasons

• Rear suspension sits lower than normal
• Air spring leakage or loss of ride height control
• Uneven rear stance on auto-leveling BMW models
• Warning lights or suspension faults related to rear air support
• Ride quality changes from a worn rear air spring

Installation Notes and Tips

Verify the vehicle has rear auto leveling before ordering. Match the year, model, and rear position exactly to the listed fitment for 2006-2007 BMW 530xi, 2008 BMW 535xi, and 2009-2010 BMW 535i xDrive. Inspect related suspension components and confirm the air line and mounting points are in serviceable condition before installation. Part number Q4006 should be used as a direct catalog reference during replacement.

Quality Assurance

FCS Q4006 is cataloged as a suspension replacement part for the specified BMW rear air spring applications. The FCS brand line identifies this component for fitment-based ordering and application matching.