KYB 334431 Suspension Strut - Front Left

KYB Excel-G Front Left Strut for Sienna

KYB Excel-G suspension strut 334431 is an OE-style replacement for the front left position on select Toyota Sienna models. It is built to restore original ride control, steering response, and body stability for daily driving.

Compatible with 2004 Toyota Sienna, front left, and 2005-2006 Toyota Sienna, front left, this KYB Excel-G strut is a direct-fit option for owners looking to return the suspension to factory-like behavior.

Key Features

• OE replacement choice for Asian mini-vans
• Restores designed control and handling on Toyota Sienna applications
• Nitrogen gas-charged, twin-tube construction
• Triple-lip fluid seal helps reduce oil and gas leakage
• Vehicle-specific, hand-assembled damping valves manage tire contact, steering response, and body movement
• Strong strut body and bracket design helps minimize flex and maintain alignment
• Made in USA
• Electronic safety systems depend on suspension performance staying within manufacturer design targets

Product Details

KYB Excel-G is KYB’s OEA line, built on the same OE assembly lines used for original equipment production and calibrated to restore the vehicle’s original suspension behavior rather than alter it. Part number 334431 is engineered for the front left side of the Toyota Sienna and is a practical choice when ride quality has become loose, noisy, or less controlled. This part cross-references Monroe Shocks & Struts 72237 for the same application.

For fitment-specific searches, this part is commonly referenced as a front left strut for 2004 Toyota Sienna and 2005-2006 Toyota Sienna. The KYB Excel-G 334431 is also listed as a replacement for Toyota OE part number 48520AE020B.

Common Issues It May Address

• Excessive bouncing after bumps or dips
• Reduced steering response during lane changes
• Body roll or instability in turns
• Uneven tire contact caused by worn damping control
• Noise or vibration from a worn front strut assembly

Installation Notes

Replace the suspension strut and coil spring assembly according to the manufacturer’s instructions on 2004 Toyota Sienna applications. KYB recommends installing new strut mounts, part number SM5180, to reduce the chance of noise and vibration. Verify the upper mount thread specification is 14x1.50 and confirm the vehicle is the front left position before installation.

Quality Assurance

KYB is a major OE supplier, and Excel-G is built to restore original designed performance using OE-quality components. The strut body dimensions include a compressed length of 16.61 inches, extended length of 23.48 inches, and stroke length of 6.87 inches for application-specific suspension tuning.