KYB SR4397 Suspension Strut and Coil Spring Assembly - Rear Left

KYB Strut-Plus SR4397 Rear Left Assembly

KYB Strut-Plus SR4397 is a pre-assembled suspension strut and coil spring assembly for the rear left position. It is built to restore ride height, handling response, and vehicle stability on select Lexus ES300h, Lexus ES350, and Toyota Avalon applications.

Key Features

• OE-style replacement choice for Asian vehicles
• Includes a KYB Excel-G strut, a stronger steel outer shell, and application-specific damping valves
• Pre-assembled for exact fitment and professional installation results
• Side-specific design with left and right part numbers, as the vehicle manufacturer intended
• Engineered to help vehicles with electronic safety systems such as ESC and ABS
• Recipient of a 2018 industry award in the import aftermarket category

Product Details

The KYB Strut-Plus line combines an OE-restoring KYB strut with a high-carbon steel coil spring selected around vehicle attributes and corner weights. That approach helps return ride height to OE specifications while maintaining the handling balance expected from the original suspension design. For drivers searching for a rear left strut assembly for 2013-2018 Lexus ES300h, 2013-2018 Lexus ES350, or 2016-2018 Toyota Avalon, KYB SR4397 provides a direct-fit suspension service solution. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What It Helps Address

• Rear suspension sag or uneven ride height
• Excessive bounce, body motion, or reduced damping control
• Worn strut performance that affects steering feel and stability
• Noisy or inconsistent rear suspension operation
• Suspension behavior that can interfere with ESC, ABS, or related systems

Installation Notes

Compatible With 2013-2018 Lexus ES300h, rear left; 2013-2018 Lexus ES350, rear left; and 2016-2018 Toyota Avalon, rear left. Replace the suspension strut and coil spring assembly according to the manufacturer’s instructions. Verify side, position, and vehicle application before installation, and confirm alignment after the repair.

Quality Assurance

KYB is an original equipment supplier, and the Strut-Plus SR4397 is engineered around OE fitment and damping requirements for the listed applications. The design uses application-specific components to support consistent suspension performance on the vehicles shown above.