KYB 339056 Suspension Strut - Front Left

KYB Excel-G Front Left Strut for Infiniti FX

Restore original ride control on your Infiniti FX with the KYB Excel-G suspension strut, part number 339056. This front left strut is built for 2003-2008 Infiniti FX35 and FX45 applications and is calibrated to return factory-style handling, stability, and steering response.

Key Features

• OE-style replacement choice for Asian SUVs and crossovers
• Fits 2003-2008 Infiniti FX35, front left
• Fits 2003-2008 Infiniti FX45, front left
• Nitrogen gas-charged twin-tube design
• Vehicle-specific, hand-assembled damping valves for controlled tire contact and body motion
• Triple-lip fluid seal helps reduce oil and gas leakage
• Strong strut body and bracket design helps maintain alignment under load
• Internal rebound spring and R-stop design included in the strut construction
• Made in USA

Product Details

The KYB Excel-G line is built on KYB OE assembly lines using OE-quality components and is calibrated to restore the vehicle’s original suspension behavior rather than change it. For Infiniti FX35 and Infiniti FX45 owners, KYB 339056 provides a direct-fit front left suspension strut solution that supports ride comfort, lane-change response, braking stability, and handling balance. This part cross-references Monroe Shocks & Struts (e.g., 72370) for the same application.

What It Helps Address

• Excessive front-end bounce or oscillation
• Reduced steering response during lane changes
• Uneven tire contact caused by worn damping
• Body movement that affects braking stability
• Suspension noise or fluid leakage from a worn strut

Installation Notes

Fits 2003-2008 Infiniti FX35, front left, and 2003-2008 Infiniti FX45, front left. Replace the suspension strut and coil spring assembly according to the manufacturer’s instructions. Verify alignment after installation, and inspect related suspension components before returning the vehicle to service. For added protection, KYB recommends a strut boot, part number SB105.

Quality Assurance

KYB is a major OE supplier, and the Excel-G line is built to OE standards on the same production lines used for original equipment applications. The design focuses on restoring factory-calibrated suspension performance for the Infiniti FX platform while supporting electronic safety systems that depend on proper suspension, brake, and tire operation.