KYB 5510015 Suspension Strut - Front Left

KYB Gas-a-just Front Left Strut for Lexus IS350

The KYB Gas-a-just 5510015 is a monotube suspension strut built as an OE-style replacement for the front left position. It is designed to restore the original control and handling characteristics of the Lexus IS sedan while delivering quicker response under demanding driving conditions.

For drivers searching for a front left strut for 2014-2016 Lexus IS350 or 2014-2015 Lexus IS250, this KYB Gas-a-just unit combines hydraulic responsiveness with high-pressure nitrogen gas support for consistent damping. The 5510015 is also a direct fitment-focused option for vehicles with larger wheels, heavier tires, towing loads, or frequent work-duty use.

Key Features

• Monotube OE replacement design for the correct suspension strut application
• Separate gas and oil chambers for fade-resistant operation and immediate response
• High gas pressure improves steering response and control
• Triple chrome plated piston rod helps reduce seal wear from fluid leakage
• Internal rebound spring included for suspension control
• Built for vehicles that work, tow, or run heavier wheel and tire setups
• Supports proper operation of electronic safety systems by maintaining intended suspension behavior

Product Details

KYB Gas-a-just struts use a monotube layout with an air-free hydraulic working area and a separate high-pressure nitrogen gas chamber. That design helps maintain consistent damping during normal driving and adds firmer response when the suspension is loaded harder. On the Lexus IS350 and Lexus IS250, the 5510015 helps restore front-end control, steering feel, and ride stability without changing the vehicle’s original suspension architecture.

This part cross-references Monroe Shocks & Struts (e.g., 39132) for the same application. The KYB Gas-a-just line is positioned as an OE monotube replacement series for drivers who want factory-style fitment with quicker response characteristics.

Common Problems This Strut Can Address

• Excessive front-end bounce or oscillation
• Reduced steering response during lane changes or cornering
• Uneven ride control after suspension wear
• Loss of damping performance under heavier loads
• Noise or instability caused by a worn front left strut

Installation Notes

Fits 2014-2016 Lexus IS350, Front Left. Fits 2014-2015 Lexus IS250, Front Left. Replace the suspension strut and coil spring assembly according to the manufacturer’s instructions. Verify mount style, compressed length, extended length, and stroke length before installation. This part uses lower mount type E2(14.2X42) and upper mount type 12X1.25.

Quality Assurance

KYB is known for OE suspension engineering, and the Gas-a-just design follows that approach with a monotube construction intended to restore original vehicle control characteristics. Part number 5510015 is built to match the specified front left application for the listed Lexus models.