KYB 5510027 Suspension Strut - Front Left

KYB Gas-a-Just Front Left Strut for Lexus

The KYB Gas-a-Just 5510027 is a monotube suspension strut built as an OE-style replacement for select Lexus applications. It is engineered to restore original steering response, ride control, and suspension feel on front-left positions for GS and RC models.

Gas-a-Just Product Line

KYB Gas-a-Just struts use a high-pressure monotube design with separate gas and oil chambers. That layout supports quick response during normal driving while providing firmer control when suspension demand increases, making it a practical choice for drivers replacing a worn front-left strut on a Lexus GS350, GS300, GS200t, RC350, or RC200t.

Key Features

• Monotube OEM replacement strut for the correct front-left application
• Helps restore designed handling and steering control on Lexus suspension systems
• High-pressure gas and oil separation supports fade-resistant operation and fast response
• Triple chrome-plated piston rod helps reduce seal wear from fluid leakage
• Higher gas pressure improves steering response
• Supports proper operation of electronic safety systems that rely on suspension performance
• KYB recommends new strut mounts, part number SM5664, to reduce noise and vibration

Detailed Description

KYB part number 5510027 is a front left suspension strut for 2013-2020 Lexus GS350, 2018-2019 Lexus GS300, 2015-2018 Lexus RC350, 2017 Lexus GS200t, 2017 Lexus RC200t, 2016 Lexus GS200t, and 2016 Lexus RC200t. It is a direct-fit, monotube replacement designed to match the original suspension architecture used on these vehicles, excluding adaptive control suspension on the GS350 application. This part cross-references OE numbers 4852080284 and 4852080374 for the same application.

Common Issues This Part Can Address

• Excessive front-end bounce or reduced damping control
• Loose or delayed steering response
• Uneven ride quality from a worn front-left strut
• Fluid leakage from a failing strut assembly
• Noisy suspension operation caused by worn upper mounts or related components

Installation Notes and Tips

Install this strut on the front-left position only for the listed Lexus applications. For GS300 and RC350 applications, replace the suspension strut and coil spring assembly according to the manufacturer’s instructions. For GS350 models, verify the vehicle is not equipped with adaptive control suspension before ordering. KYB recommends replacing the strut mount at the same time to help reduce noise and vibration.

Quality Assurance

KYB manufactures Gas-a-Just as an OE monotube replacement line intended to restore factory-style suspension performance. The design uses a high-pressure monotube layout and a chrome piston rod to support consistent operation and reduced seal wear.