KYB 553385 Shock Absorber - Rear

KYB Gas-a-Just Rear Shock for Volvo

The KYB Gas-a-Just 553385 is a rear suspension shock absorber built as an OE-style monotube replacement for select Volvo applications. It is engineered to restore original ride control while adding quicker response for vehicles that carry extra load, tow, or run larger wheels and tires.

Gas-a-Just Product Line

KYB Gas-a-Just shocks use a high-pressure monotube design with separate gas and oil chambers. That layout supports fade-resistant operation, responsive damping, and more consistent control than many original twin-tube designs, especially in demanding rear suspension use.

Key Features

• Adds up to 25% more damping performance over original equipment shocks
• Monotube construction separates gas and oil for consistent response
• High gas pressure improves steering response and suspension control
• Triple chrome plated piston rod helps reduce seal wear and fluid leakage
• Designed specifically for Volvo applications
• Dust cover included
• Rear shock absorber, part number 553385

Detailed Description

KYB 553385 is a rear suspension shock absorber for 1999-2009 Volvo S60, V70, and S80 applications listed below. It is a recommended OE replacement for the rear suspension on Volvo S60, Volvo V70, and Volvo S80 models, with valving tuned for the platform and the demands of daily driving. The monotube design uses an air-free hydraulic working area and a separate high-pressure nitrogen chamber to deliver controlled damping and immediate reaction when the suspension is loaded. This part cross-references Monroe Shocks & Struts (e.g., 39040) for the same application.

Common Problems This Part Can Address

• Excessive rear bounce after bumps or dips
• Reduced stability when carrying cargo or towing
• Slow suspension response during lane changes and braking
• Fluid leakage from worn shock seals
• Loss of control feel on Volvo S60, V70, or S80 rear suspension systems

Installation Notes and Tips

• Fits 2001-2009 Volvo S60, rear, excluding electronic adjustable suspension
• Fits 2001-2007 Volvo V70, rear, without electronic suspension
• Fits 1999-2006 Volvo S80, rear, excluding Nivomat rear suspension
• Compressed length: 11.81 in; extended length: 17.91 in; stroke length: 6.10 in
• Lower mount type: E2(12X74); upper mount type: S1(12MM)
• KYB recommends new strut mounts, part number SM5493, to reduce noise and vibration

Quality Assurance

KYB designs Gas-a-Just shocks as OE monotube replacements with application-specific valving for Volvo rear suspension systems. The high-pressure design and chrome piston rod construction are intended to support consistent damping performance and reduced seal wear over time.