When your 2022 Lexus RX produces a groaning noise while turning the steering wheel, the power steering system is typically communicating a problem. This groaning during steering input indicates resistance or issues in the steering assist mechanism.
Electric Power Steering Considerations
The RX uses electric power steering (EPS) rather than traditional hydraulic power steering. EPS systems don't have fluid that can run low, but they can develop motor, rack, or column issues that create groaning sounds during steering effort.
Steering Rack Issues
The steering rack converts rotational steering input into wheel movement. Internal wear, contamination, or damage can create groaning as the rack moves. This may be more pronounced during full-lock turns or during parking maneuvers.
Steering Column Components
The intermediate steering shaft and universal joints in the steering column can develop wear or binding that creates groaning during steering input. These sounds typically occur regardless of whether the vehicle is moving.
Strut Mount Bearings
Front strut mount bearings allow the struts to rotate with steering. Worn bearings groan or creak during steering, particularly during slow turns while stationary or at parking lot speeds. This sound often comes from the wheel well area rather than the steering column.
CV Joint Connection
While CV joints typically click rather than groan, binding or worn inner CV joints can contribute to unusual sounds during steering, particularly when the steering angle stresses the joint differently.
Cold Weather Effects
Some steering groaning is more pronounced when cold and diminishes as components warm up. Lubricants in the steering system thicken when cold, potentially creating temporary groaning that resolves with driving.