KYB 340021 Suspension Strut - Front Left

KYB Excel-G Front Left Strut for Infiniti

The KYB Excel-G suspension strut is built to restore original ride control, stability, braking response, and steering feel on select Infiniti applications. This KYB Excel-G 340021 front left strut is an OE-style replacement for drivers who want factory-correct handling without changing the vehicle’s designed suspension behavior.

Key Features

• OE replacement choice for Asian performance vehicles
• Restores designed control and handling on Infiniti models
• Nitrogen gas-charged, twin-tube suspension strut design
• Triple-lip fluid seal helps reduce oil and gas leakage
• Vehicle-specific, hand-assembled damping valves manage tire contact, steering response, and body movement
• Internal anti-rollover spring for consistent operation
• Strong strut body and bracket construction helps minimize flex and maintain alignment
• Part number 340021

Product Details

KYB Excel-G is part of KYB’s OEA-focused Excel-G line, which is calibrated to restore original suspension performance rather than alter it. Built on KYB OE assembly lines with OE-quality components, this strut is designed for the front left position on 2007-2008 Infiniti G35, 2009-2010 Infiniti G37 without 4 Wheel Steering, 2011-2012 Infiniti G25, 2011-2013 Infiniti G37, and 2015 Infiniti Q40. The 340021 strut supports proper tire contact and body control, which matters for braking, lane changes, and electronic safety system performance. This part cross-references Monroe Shocks & Struts 71117 for the same application.

What It Helps Address

• Excessive bounce or float after bumps
• Loose steering feel or delayed response
• Nose dive during braking
• Uneven tire contact from worn suspension damping
• Reduced stability in lane changes and cornering

Installation Notes

Install on the front left position only. Replace the suspension strut and coil spring assembly according to the manufacturer’s instructions where specified. Verify fitment by year, model, and configuration before installation, especially on 2009-2010 Infiniti G37 applications that require w/o 4 Wheel Steering. The compressed length is 16.73 in., extended length is 19.52 in., and stroke length is 2.79 in. Upper mount type is 12x1.25 and lower mount type is E2(14x40).

Quality Assurance

KYB is a major OE supplier, and the Excel-G line is manufactured using the same OE-quality components and OE assembly-line standards used for original equipment production. The strut body and bracket design are engineered to reduce flex and help maintain correct alignment under normal driving conditions.