KYB 339855 Suspension Strut - Front Left

KYB Excel-G Front Left Strut for Fiat 500

The KYB Excel-G 339855 is a front left suspension strut for the 2012-2017 Fiat 500. It is built to restore original ride control, steering response, and body stability without changing the vehicle’s intended suspension behavior.

As part of KYB’s Excel-G line, this strut is calibrated for OE-style performance and assembled on KYB production lines using OE-quality components. For Fiat 500 owners looking for a direct replacement front left strut, 339855 is a practical choice for maintaining factory handling characteristics.

Key Features

• KYB recommended OEM replacement strut
• Restores designed control and handling for the Fiat 500
• Nitrogen gas-charged, twin-tube construction
• Triple-lip fluid seal helps reduce oil and gas leakage
• Vehicle-specific, hand-assembled damping valves manage tire contact, steering response, and body movement
• Strong strut body and bracket design helps minimize flex and maintain alignment
• Includes B-stop and R-stop design features

Detailed Description

KYB Excel-G part number 339855 is engineered as an OE-style suspension strut for the front left position on the Fiat 500. It is designed to restore the vehicle’s original ride control, lane-change response, stopping stability, and handling balance. The Excel-G line is built to match factory suspension behavior, making it a strong fit for drivers who want the suspension to perform as the manufacturer intended.

This strut measures 14.2 inches compressed length, 21.22 inches extended length, and 7.02 inches of stroke. It uses a 12X1.25 upper mount type and does not include a dust cover or internal rebound spring. KYB’s in-house damping calibration helps maintain proper tire contact and body control, which is important for the 2012-2017 Fiat 500 front suspension.

This part cross-references Fiat 4670557AC and 4670559AC for the same application.

What It Helps Address

• Excessive bouncing or poor damping response
• Loose steering feel or delayed turn-in
• Nose dive during braking
• Uneven tire contact caused by worn suspension control
• Reduced stability during lane changes and cornering

Installation Notes and Tips

Fits 2012-2017 Fiat 500, front left. Replace the suspension strut and coil spring assembly according to the manufacturer’s instructions. KYB recommends new strut mounts, part number SM5685, to reduce noise and vibration. A KYB strut boot, part number SB101, helps protect the new strut from dirt, debris, and salt.

Verify upper mount thread size and suspension configuration before installation. Proper alignment should be checked after replacement to help maintain correct handling and tire wear.

Quality Assurance

KYB is a major OE supplier of shocks and struts, and the Excel-G line is produced on the same KYB OE assembly lines using OE-quality components. The design focus is restoring original suspension performance for the Fiat 500 rather than altering it.