KYB 334399 Suspension Strut - Front Right

KYB Excel-G Front Right Strut for Lexus RX and Highlander

The KYB Excel-G 334399 is a front right suspension strut built to restore original ride control, steering response, and body stability. It is a direct OE-style replacement for select Lexus RX and Toyota Highlander applications, including Lexus RX350, RX400h, RX330, and Toyota Highlander front right fitments.

Key Features

• Nitrogen gas-charged, twin-tube suspension strut
• OE-calibrated damping to restore factory handling characteristics
• Triple-lip fluid seal helps reduce oil and gas leakage
• Vehicle-specific, hand-assembled damping valves manage tire contact and body motion
• Strong strut body and bracket design helps minimize flex and maintain alignment
• Designed for electronic safety systems that rely on proper suspension performance
• Recommended OE-style replacement for Asian SUVs and crossovers

Product Details

KYB Excel-G is KYB’s OE replacement line, built on the same assembly lines used for original equipment production and calibrated to return the vehicle to its designed performance rather than alter it. This front right strut, part number 334399, is a practical choice for drivers addressing worn suspension on a Lexus RX or Toyota Highlander. It cross-references Monroe Shocks & Struts 72211 for the same application.

Compatible fitment includes 2007-2009 Lexus RX350, front right; 2006-2008 Lexus RX400h, front right; 2001-2007 Toyota Highlander, front right; and 2004-2006 Lexus RX330, front right. For Lexus RX and Highlander owners looking for an OE-style suspension strut replacement, the KYB Excel-G 334399 is built to restore predictable control and consistent road feel.

What This Strut Helps Address

• Excessive bouncing after bumps
• Reduced steering response during lane changes
• Nose dive under braking
• Body roll and instability in turns
• Uneven tire contact caused by worn damping

Installation Notes

Install on the front right position only for the listed applications. KYB recommends replacing the strut mount, part number SM5423, to reduce noise and vibration, and using strut boot SB102 to help protect the unit from dirt, debris, and road salt. On RX400h and Highlander applications, replace the suspension strut and coil spring assembly according to the manufacturer’s instructions. Verify compressed length, extended length, and mounting dimensions before installation.

Quality Assurance

KYB is a major OE supplier, and Excel-G is classified as an Original Equipment for the Aftermarket replacement line. The 334399 uses OE-quality components and factory-style damping calibration to help maintain the vehicle’s original suspension behavior.