Replacement RT28080021 Front Right Steering Knuckle - Toyota Sienna FWD

The Replacement RT28080021 is a front right (passenger side) steering knuckle designed as a direct-fit OEM replacement for the 2004–2010 Toyota Sienna with Front-Wheel Drive (FWD). This part restores the structural integrity of the front suspension and steering system, providing a precise factory-spec fit without modification.

The steering knuckle is a critical front suspension component that connects the wheel hub and bearing assembly to the upper strut and lower control arm, while also interfacing with the tie rod end to translate steering input into directional wheel movement. A damaged or worn knuckle can cause braking difficulties, excessive tire wear, wheel vibration, or abnormal suspension noise.

Key Features:

• Direct OEM replacement — engineered to match original factory specifications
• Front right (passenger side) position for FWD Toyota Sienna applications
• Interfaces with strut assembly, lower control arm ball joint, and outer tie rod end
• Compatible with 5-bolt, 5-lug wheel hub configurations (M12x1.5 wheel studs)
• Forged steel construction for strength and durability
• A wheel alignment is recommended after installation

OEM & Cross-Reference Part Numbers:

• Toyota OEM: 4321108010 (43211-08010)
• Cross-Reference: 435020E030, 4778108020 (47781-08020)
• Aftermarket: 698-424, 698424, 9692000, 90080-36193

This knuckle is compatible with FWD variants only — it does not fit all-wheel-drive (AWD) Sienna models. A four-wheel alignment is strongly recommended after installation.