KYB 551131 Suspension Strut - Front Left

Overview of KYB Gas-a-just Suspension Strut 551131

The KYB Gas-a-just suspension strut 551131 is engineered for Lexus IS200t, IS250, and IS350 models, providing reliable damping performance. Designed to restore original handling and ride quality, this strut is a direct replacement part tailored to specific vehicle requirements.

• Compressed length: 17.34 inches
• Extended length: 20.78 inches
• Stroke length: 3.44 inches
• Lower mount type: E2 (14.2x42)
• Upper mount type: 12x1.25
• Internal rebound spring included
• Right stop (R-stop) included, no B-stop
• Dust cover not included

Details on KYB Gas-a-just Product Line

The Gas-a-just line from KYB focuses on gas-charged struts designed to provide consistent damping and improved vehicle control. This product line incorporates an internal rebound spring to enhance ride stability and responsiveness. The 551131 strut is part of this line, offering a balance of performance and durability for Lexus IS series vehicles.

Technical Description and Fitment

This suspension strut features a compressed length of 17.34 inches and an extended length of 20.78 inches, with a stroke length of 3.44 inches, ensuring precise fitment and function. The lower mount uses an E2 type with dimensions 14.2x42, while the upper mount is sized 12x1.25, matching factory specifications for Lexus IS200t, IS250, and IS350 models. The inclusion of an internal rebound spring and R-stop enhances damping control during suspension travel. Note that this strut does not include a dust cover or B-stop.

Common Applications and Problem Solving

• Restores proper suspension travel and damping on Lexus IS200t, IS250, and IS350
• Addresses issues with worn or leaking struts causing poor ride quality
• Improves vehicle stability and handling during cornering and braking
• Replaces damaged or corroded suspension components
• Eliminates excessive body roll and uneven tire wear

Installation Notes and Tips

• Verify compatibility with Lexus IS200t, IS250, or IS350 before installation
• Use appropriate tools to handle the E2 lower mount and 12x1.25 upper mount fittings
• Inspect related suspension components for wear during replacement
• Ensure proper torque specifications are followed for mounting hardware
• Alignment check is recommended after installation

Quality Assurance and Warranty

KYB Gas-a-just struts are manufactured to meet OEM standards for fit and function. The internal rebound spring and R-stop features contribute to consistent performance over time. While specific warranty details are not provided here, KYB products typically come with a limited warranty covering defects in materials and workmanship.