KYB SR4387 Suspension Strut and Coil Spring Assembly - Front Left

KYB Strut-Plus SR4387 Front Left Assembly

The KYB Strut-Plus SR4387 is a front left suspension strut and coil spring assembly for select Nissan Pathfinder and INFINITI SUV applications. Built to restore ride height, steering response, and stability, it combines an OE-restoring KYB strut with a high carbon steel coil spring matched to vehicle attributes and corner weights.

Key Features

• Part number SR4387 for front left suspension service
• Complete strut and coil spring assembly
• OE-restoring KYB strut construction
• High carbon steel coil spring engineered to restore ride height within OE specifications
• Boot included
• Internal rebound spring included
• Compressed length: 16.86 in.
• Extended length: 21.45 in.
• Stroke length: 4.59 in.

Product Details

KYB Strut-Plus SR4387 is engineered for vehicles where the strut assembly carries vehicle weight, sets ride height, serves as the steering pivot, and contributes to overall stability. For 2013-2016 Nissan Pathfinder front left applications, as well as 2014-2015 INFINITI QX60 front left and 2013 INFINITI JX35 front left, this assembly provides a direct replacement format that simplifies suspension service while restoring original ride characteristics. KYB’s OE supplier background is reflected in the spring and strut pairing, which is built around the vehicle’s original suspension geometry and load requirements. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Common Issues This Part Addresses

• Front-end sag or reduced ride height
• Excessive bounce or poor damping control
• Loose or unstable steering feel
• Uneven suspension response on the front left corner
• Wear-related loss of ride comfort and handling precision

Installation Notes and Tips

Fits 2013-2016 Nissan Pathfinder, front left; fits 2014-2015 INFINITI QX60, front left; fits 2013 INFINITI JX35, front left. Confirm the vehicle’s suspension configuration before ordering and compare the original assembly dimensions to SR4387: compressed length 16.86 in., extended length 21.45 in., and stroke length 4.59 in. Because this is a strut and spring assembly, proper alignment is recommended after installation.

Quality Assurance

KYB manufactures suspension components as an original equipment supplier, and the Strut-Plus line is built to restore handling, control, and ride height using OE-focused engineering and matched spring rates.