TOYOTA 48702-60031 Rear Upper Control Arm Bushing

The genuine TOYOTA 48702-60031 (superseding part number: 48702-60030) rear upper control arm bushing is a premium OEM component that plays a vital role in the stability and comfort of the vehicle's rear suspension system. This rubber-to-metal bushing (Bush Sub-Assy) connects the rear upper control arm to the vehicle chassis or subframe while effectively dampening road vibrations and impacts.

Technical Specifications and Construction

• Manufacturer: TOYOTA (Original Equipment Manufacturer)
• Part Number: 48702-60031 (Replaces 48702-60030)
• Part Type: Rear Upper Control Arm Bushing (BUSH SUB-ASSY)
• Fitting Position: Rear Axle, Upper Control Arm
• Material Composition: High-strength vulcanized rubber and precision steel sleeve engineered to withstand heavy mechanical loads and environmental exposure

Role and Function

The rear upper control arm bushing is designed to allow controlled movement of the control arm during suspension articulation while maintaining the rigidity necessary for correct suspension geometry. The internal rubber structure absorbs vibrations, minimizing noise transfer from the chassis into the cabin, thereby enhancing ride comfort and road holding.

Symptoms of Wear

Over time, rubber components deteriorate, crack, or separate from the metal sleeve due to constant mechanical stress and environmental factors. Typical signs of failure include:

• Knocking, clunking, or squeaking noises originating from the rear suspension, especially over uneven road surfaces or during cornering.
• Vague or unstable handling, particularly at highway speeds or under cornering loads.
• Uneven or abnormal tire wear caused by misaligned suspension geometry.
• Visually noticeable cracks, tears, or rubber deterioration on the bushing.

To ensure safe and precise handling, it is recommended to replace suspension bushings in pairs per axle and perform a four-wheel alignment following installation.