KYB SR4639 Suspension Strut and Coil Spring Assembly - Front Left

KYB Strut-Plus SR4639 for Sonata Front Left

The KYB Strut-Plus SR4639 is a front left suspension strut and coil spring assembly for 2011-2014 Hyundai Sonata models without Sport Suspension and without Coil Spring +H. It is built to restore ride height, steering response, and vehicle control with OE-focused components.

Key Features

• Fits 2011-2014 Hyundai Sonata, front left
• Part number SR4639 for direct application lookup
• OE-restoring KYB strut engineered to recover handling and control
• High carbon steel coil spring selected around vehicle attributes and corner weights
• Helps restore ride height within OE specifications
• Boot included for added protection of the strut shaft area
• Compatible with vehicles noted as recommended OEM replacement

Product Details

KYB Strut-Plus is the brand’s assembled strut line for drivers who need a complete front suspension service part rather than a bare strut. The SR4639 combines KYB’s OE-restoring strut design with a coil spring developed to match the Sonata’s weight distribution and suspension requirements. That combination helps return the front left corner to proper ride height and supports stable steering feel on the 2011-2014 Hyundai Sonata. The SR4639 is also referenced as a replacement for applications cross-referencing Monroe Shocks & Struts 172286 and 182286.

Measured specifications include a compressed length of 13.46 inches, an extended length of 20.7 inches, and a stroke length of 7.24 inches. The KYB Strut-Plus SR4639 is intended for the front left position only and is listed for Sonata models without Sport Suspension and without Coil Spring +H.

What It Helps Address

• Excessive front-end bounce or poor damping control
• Uneven ride height at the front left corner
• Loose or inconsistent steering response
• Reduced stability during braking, cornering, or lane changes
• Wear related to an aging strut and spring assembly

Installation Notes

Fits 2011-2014 Hyundai Sonata, front left. Confirm the vehicle is without Sport Suspension and without Coil Spring +H before ordering. Verify the part number SR4639, the front left position, and the measured dimensions against the original assembly before installation. Because this is a suspension strut and coil spring assembly, proper alignment is recommended after replacement.

Quality Assurance

KYB is an original equipment supplier, and the Strut-Plus line is engineered around OE ride and handling targets. The SR4639 uses a KYB strut and a high carbon steel coil spring to support consistent suspension performance for the specified Sonata applications.