Restore your Toyota Sienna's original ride control with the KYB shock absorber, part number 344308. This Excel-G gas shock installs as a direct-fit rear replacement for the 2004-2020 Toyota Sienna, and it's built on the very same KYB OE assembly lines — using the same OE-quality components and calibrated to restore the vehicle's originally designed performance rather than change it, which earns it the OEA (Original Equipment for the Aftermarket) classification.
- Twin-tube, nitrogen gas-charged design: the Excel-G construction that manages damping and helps keep the tires in firm contact with the road.
- Vehicle-specific damping valves: hand assembled in-house to correctly manage tire contact, steering response and body movement.
- Triple lip fluid seal: reduces the chance of oil and gas leaking out.
- Made in USA: and designed to help keep electronic safety systems performing as the vehicle manufacturer intended.
KYB is a world-leading supplier of shocks and struts to new-vehicle manufacturers, and the Excel-G is the #1 recommended original equipment replacement choice for Asian minivans, helping restore the designed control and handling of your Sienna. Sold individually — replacing both rear shocks together as a pair is recommended for even, balanced ride control.
Interchange: G51805 · 37284 · 4853108010 · 4853108030 · 4853109850 · 4853109870 · 4853109A80 · 4853109B00 · 48531A9050
This part cross-references / interchanges with the following part numbers:
Frequently Asked Questions
Does this KYB gas shock absorber fit my vehicle?
It's a direct-fit rear replacement for the 2004-2020 Toyota Sienna. Check the Buyer's Guide tab to confirm your exact year and configuration before ordering.
Is this a front or rear shock?
Rear. This KYB Excel-G shock absorber is cataloged for the rear position on the listed Toyota Sienna applications.
What is the Excel-G design?
It's a nitrogen gas-charged, twin-tube shock built on KYB's OE assembly lines with OE-quality components, calibrated to restore the vehicle's original designed performance.
How many should I buy?
This listing is for one shock. Replacing both rear shocks together as a matched pair is recommended for even, balanced ride control.
What are signs my shock may need replacing?
Excessive bouncing, poor body control, uneven tire wear, or fluid leaking from the shock can be signs the unit is worn and may need replacing.
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