KYB SR4647 Suspension Strut and Coil Spring Assembly - Front Left

KYB Strut-Plus SR4647 Front Left Assembly

The KYB Strut-Plus SR4647 is a front left suspension strut and coil spring assembly for select INFINITI applications. It combines an OE-restoring KYB strut with a high carbon steel coil spring to help return ride height, handling response, and steering feel to factory specifications.

Built for the front left corner, this assembly is a direct replacement for vehicles that rely on the strut as a structural suspension component, steering pivot, and stability control point. It is a practical choice for drivers searching for a KYB SR4647 front left strut assembly for INFINITI G37, G25, G35, or Q40.

Key Features

• Part type: suspension strut and coil spring assembly
• Brand line: KYB Strut-Plus
• Front left position
• Boot included
• Internal rebound spring included
• Compressed length: 16.73 in.
• Extended length: 19.52 in.
• Stroke length: 2.79 in.
• High carbon steel coil spring developed around vehicle attributes and corner weights
• OE-restoring strut design for factory-style ride height and control

Product Details

KYB Strut-Plus is the brand’s assembled strut line for drivers who want a complete front suspension unit rather than replacing the strut and spring separately. The SR4647 uses KYB’s OE-focused strut design with a matched coil spring to help restore the original suspension geometry and ride height. For INFINITI G37, G25, G35, and Q40 front left applications, this assembly supports consistent handling characteristics and proper suspension positioning.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Vehicle Fitment

• Fits 2015 INFINITI Q40, front left. Recommended OEM replacement; new part number; available 1st quarter; Strut-Plus.
• Fits 2009-2013 INFINITI G37, front left. Recommended OEM replacement; new part number; available 1st quarter; Strut-Plus.
• Fits 2011-2012 INFINITI G25, front left. Recommended OEM replacement; new part number; available 1st quarter; Strut-Plus.
• Fits 2007-2008 INFINITI G35, front left. Recommended OEM replacement; w/o 4 Wheel Steering; new part number; available 1st quarter; Strut-Plus.

Common Issues This Assembly Can Address

• Front-end ride height that has dropped from worn spring or strut components
• Excessive bounce, harshness, or reduced damping control
• Loose or inconsistent steering response from a worn front left strut
• Noise or instability caused by aging suspension components
• Need for a complete OE-style replacement on the front left corner

Installation Notes and Tips

Verify the vehicle’s year, model, and front left suspension configuration before ordering. The 2007-2008 INFINITI G35 application is for vehicles without 4 Wheel Steering. Because this is a complete strut and spring assembly, it is suited to replacing the full corner unit during suspension service.

Quality Assurance

KYB is an original equipment supplier, and the Strut-Plus line is engineered to restore handling and control with OE-oriented components and spring specifications. The SR4647 is built to match the needs of the listed INFINITI applications and support factory-style suspension performance.