FCS Q4018 Air Suspension Spring - Rear

Rear Air Suspension Spring for Cadillac XTS

Restore rear ride support with the FCS Q4018 air suspension spring for select Cadillac XTS models. This rear air spring is built for 2013-2019 Cadillac XTS applications and is a direct-fit suspension replacement for the rear position.

Key Features

• Rear air suspension spring for Cadillac XTS
• Fits 2013-2019 Cadillac XTS, rear
• FCS Q4018 replacement part number
• Designed for suspension service on air-sprung rear applications
• Direct replacement for the listed vehicle fitment

Detailed Description

The FCS Q4018 is an air suspension spring for the rear suspension of the 2013-2019 Cadillac XTS. It is intended for vehicles equipped with rear air spring suspension and supports the vehicle’s rear ride height and load-carrying function. If you are searching for a rear air suspension spring for Cadillac XTS 2013-2019, Q4018 provides a fitment-specific replacement option.

FCS is the brand line identified for this part, and Q4018 is the catalog number used to match the correct rear application. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What It Helps Address

• Rear suspension sag on a Cadillac XTS
• Uneven rear ride height
• Air spring leakage at the rear suspension
• Loss of rear load support
• Ride quality issues tied to worn rear air suspension components

Installation Notes and Tips

Verify the vehicle is a 2013-2019 Cadillac XTS with rear air suspension before ordering. Confirm the rear position and compare the original part number, including Q4018, to the removed component. After installation, inspect the system for leaks and check ride height operation according to the vehicle service procedure.

Quality Assurance

FCS Q4018 is cataloged as a fitment-specific suspension replacement for the listed Cadillac XTS rear application. Use the vehicle’s suspension configuration and part number match to confirm correct selection before installation.