KYB 551609 Suspension Strut - Front

KYB Gas-a-Just Front Strut for Jaguar S-Type

The KYB Gas-a-Just 551609 is a front suspension strut for 2000-2002 Jaguar S-Type applications with the specified OE-style mounting configuration. It uses a monotube design with separate hydraulic and high-pressure gas chambers to deliver responsive damping, stable control, and consistent ride quality in daily driving.

Gas-a-Just Product Line

KYB Gas-a-Just struts are built as monotube OE replacement units for vehicles that carry heavier loads, tow, or run larger wheels and tires. For the Jaguar S-Type, this line is aimed at restoring the original handling balance while adding quicker response when suspension demand increases.

Key Features

• Monotube OE replacement strut for the front suspension
• Fits 2000-2002 Jaguar S-Type, front
• Part number 551609
• High-pressure monotube construction separates gas and oil for fade-resistant operation
• Air-free hydraulic piston and valve area improves responsiveness and control
• Floating piston and nitrogen gas chamber support a smoother ride during normal driving
• Triple chrome plated piston rod helps reduce seal wear from fluid leakage
• Quick gas pressure response improves steering feel
• Supports proper operation of electronic safety systems that rely on suspension performance

Detailed Description

KYB 551609 is engineered as a direct front strut replacement for the Jaguar S-Type, restoring the vehicle’s designed suspension behavior with a monotube layout. The unit measures 17.89 inches compressed, 21.65 inches extended, and 3.76 inches of stroke, with an E2(14.2x48) lower mount and 12x1.75 upper mount. This configuration is intended for the 2000-2002 Jaguar S-Type front position noted in the fitment data, including the recommended OEM replacement application to VIN M45254, excluding Adaptive Control Suspension.

This part cross-references Monroe Shocks & Struts (e.g., 71366) for the same application. The KYB Gas-a-Just design is a practical choice when the suspension needs firmer control, especially on vehicles with added load demands or larger wheel and tire setups. Part number 551609 is also listed alongside Jaguar XR8011178 and Gabriel G51769 interchange references.

Common Problems This Strut Can Address

• Excessive front-end bounce after bumps or dips
• Loose or delayed steering response
• Reduced control during braking and cornering
• Ride fade from worn hydraulic damping
• Noise or vibration related to worn front strut performance

Installation Notes and Tips

Compatible With 2000-2002 Jaguar S-Type, front. Verify the vehicle is not equipped with Adaptive Control Suspension and confirm the VIN note before ordering. KYB recommends replacing the strut mount, part number SM5449, to reduce the chance of noise and vibration after installation. The lower mount is an eye-ring style, so confirm the mounting points match the vehicle before installation.

Quality Assurance

KYB is an OE suspension supplier, and the Gas-a-Just line is built to OE-style specifications for controlled damping and consistent operation. The monotube design, high-pressure gas separation, and chrome piston rod construction are used to support long-term suspension performance on the Jaguar S-Type.