KYB 339209 Suspension Strut - Rear Left

KYB Excel-G Rear Left Strut for Lexus RX

KYB Excel-G part number 339209 is a rear left suspension strut built to restore original ride control, stability, and steering response. It is a direct OE-style replacement for select Lexus RX applications, including Lexus RX350 and RX400h models.

The Excel-G line is KYB’s OE-focused product range, assembled on the same production lines used for original equipment and calibrated to return the vehicle to its designed handling characteristics. For Lexus RX owners looking for a rear left strut replacement that matches factory performance targets, 339209 is a precise application-specific option.

Key Features

• Nitrogen gas-charged, twin-tube suspension strut design
• Vehicle-specific damping valves for controlled tire contact and body motion
• Triple-lip fluid seal to reduce oil and gas leakage
• Strong strut body and bracket construction to help maintain alignment
• OEA classification for original equipment aftermarket replacement
• Rear left position for confirmed Lexus RX fitments

Product Details

KYB Excel-G 339209 is engineered to restore the designed ride and handling balance of the Lexus RX platform rather than alter it. The valving, seal design, and structural construction are selected to support consistent suspension response, while the OE-style build helps preserve the vehicle’s original control characteristics. This part cross-references Monroe Shocks & Struts (e.g., 72764) for the same application.

Common Problems This Strut Can Address

• Excessive rear suspension bounce or oscillation
• Reduced stability during lane changes and cornering
• Uneven tire contact caused by worn damping performance
• Noisy or loose-feeling rear suspension response
• Loss of factory-like ride control on Lexus RX models

Installation Notes

Fits 2008-2009 Lexus RX350, rear left, recommended OEM replacement; exc. air suspension. Fits 2008 Lexus RX400h, rear left, replace suspension strut and coil spring assembly according to manufacturer’s instructions. Fits 2007 Lexus RX400h, rear left, recommended OEM replacement; from 5/2007. Verify the upper mount thread specification of 14X1.50 and confirm all suspension components are inspected before installation. KYB recommends protecting new struts from road debris with strut boot SB104.

Quality Assurance

KYB is a major OE supplier, and the Excel-G line is produced on the same KYB OE assembly lines using OE-quality components. The part is built to restore original designed performance for Lexus RX applications and to support proper operation of suspension-related vehicle systems.