KYB 5510012 Suspension Strut - Front Left

KYB Gas-a-just Front Left Strut for Lexus IS

The KYB Gas-a-just 5510012 is a monotube suspension strut built as an OE-style replacement for the front left corner. It is engineered to restore the original control and handling characteristics of the Lexus IS sedan while delivering quick response under load.

Gas-a-just Product Line

KYB Gas-a-just struts use a monotube design with separate hydraulic and high-pressure nitrogen gas chambers. That layout supports consistent damping, fade-resistant operation, and faster steering response, especially on vehicles that carry extra load, tow, or run larger wheels and tires.

Key Features

• Part number 5510012
• Monotube OE replacement for the front left suspension position
• High-pressure gas and oil separation for responsive damping
• Triple chrome-plated piston rod helps reduce seal wear
• Built to restore control and handling on Lexus IS sedan applications
• Suitable for vehicles that work, tow, or use heavier tires and wheels
• Supports proper operation of electronic safety systems by maintaining suspension behavior as designed

Detailed Description

KYB 5510012 is a Gas-a-just suspension strut designed for direct replacement use on select Lexus IS models. The monotube construction uses an air-free hydraulic working area for control and a separate high-pressure nitrogen chamber for immediate response. This design helps maintain consistent damping during normal driving and under more demanding conditions. The ultra-smooth triple chrome-plated piston rod is used to reduce seal wear and help limit fluid leakage-related failure. This part cross-references Lexus 4852059775 for the same application.

What It Helps Address

• Excessive front-end bounce or poor damping control
• Loose steering feel or delayed response
• Reduced stability after suspension wear
• Ride fade during heavier-duty driving conditions
• Handling changes caused by worn OE strut performance

Installation Notes

Compatible With 2016-2018 Lexus IS300, front left; 2014-2018 Lexus IS350, front left; and 2014-2015 Lexus IS250, front left. Replace the suspension strut and coil spring assembly according to the manufacturer’s instructions. Verify all mounting points, torque specifications, and alignment settings before returning the vehicle to service.

Quality Assurance

KYB is an OE supplier known for suspension components engineered to match factory-style performance targets. The Gas-a-just design is built to restore original handling characteristics while maintaining consistent damping response in everyday driving.