KYB 344480 Shock Absorber - Rear

KYB Excel-G Rear Shock for Toyota Sienna

KYB Excel-G part number 344480 is a rear suspension shock absorber built to restore original ride control, stability, and steering response on select Toyota Sienna models. It is an OE-style replacement for drivers who want factory-correct damping and predictable handling.

The Excel-G line is KYB’s original-equipment replacement series, built on the same OE assembly lines and calibrated to return the vehicle to its designed performance. For Toyota Sienna rear shock replacement, 344480 is a direct-fit option for common OEM-style service needs.

Key Features

• Fits rear suspension applications on select 2004-2020 Toyota Sienna models
• Compressed length: 17.24 in; extended length: 27.12 in; stroke length: 9.88 in
• Nitrogen gas-charged, twin-tube shock absorber design
• Triple-lip fluid seal helps reduce oil and gas leakage
• Vehicle-specific, hand-assembled damping valves for controlled tire contact and body motion
• Strong strut body and bracket construction to help maintain alignment under load
• Made in USA
• R-stop included

Detailed Description

KYB Excel-G 344480 is engineered as an Original Equipment for the Aftermarket replacement for the Toyota Sienna rear suspension. It uses OE-quality components and factory-style damping calibration to restore the vehicle’s intended ride control, lane-change response, braking stability, and handling balance without changing the original suspension character. This part cross-references Monroe Shocks & Struts 37301 for the same application.

Compatible With 2004-2020 Toyota Sienna, rear; 2014-2020 Toyota Sienna, rear with Mobility Auto Access; 2011-2013 Toyota Sienna, rear with Mobility Auto Access Package; and 2005-2010 Toyota Sienna, rear with 8 Passenger Seating. Part number 344480 is also referenced by Toyota OE numbers 48531A9200, 4853109860, and 4853109880.

What It Helps Address

• Excessive bouncing after bumps
• Loose or unsettled rear ride control
• Reduced braking stability from worn damping
• Delayed response during lane changes and cornering
• Uneven tire contact caused by weak rear shock performance

Installation Notes and Tips

Review the vehicle-specific fitment notes before ordering, since some Toyota Sienna applications may require additional components, dust cover, or bushings. Confirm rear position, model year, and seating or mobility package details before installation. Inspect related suspension hardware and mounting points for wear before replacing the shock absorber.

Quality Assurance

KYB is a major OE shock and strut supplier, and the Excel-G line is built to OE-style standards on KYB production lines using quality components matched to original suspension behavior. The design focuses on restoring factory ride control and supporting the operation of vehicle systems that depend on proper suspension performance.