TOYOTA 48632-0K040 Upper Control Arm Bushing

The genuine OEM part number TOYOTA 48632-0K040 upper control arm bushing (BUSH, UPR ARM) is a key component of the vehicle's front suspension system. Its primary role is to provide a flexible yet stable mounting for the upper control arm to the body or subframe, ensuring proper suspension geometry and optimal wheel camber during driving.

This premium-quality genuine (OEM) bushing effectively absorbs vibrations, road impacts, and noise, significantly enhancing ride comfort and protecting other suspension components from premature wear.

Technical Features and Material Quality:

• Material Composition: A combination of high-tensile vulcanized natural rubber and a precision steel sleeve resistant to environmental influences (moisture, mud, road salt) and extreme temperature fluctuations.
• Design: Bonded metal-rubber sleeve construction that provides optimal torsional stiffness and flexibility during vertical travel of the control arm.
• Fitting Position: Front axle, upper control arm (applicable to both left and right sides depending on the suspension design).
• OEM Quality: Strict manufacturing tolerances characteristic of genuine Toyota parts guarantee a precise fit and extended service life.

Typical Symptoms of Failure and Importance:

Control arm bushings are natural wear items that degrade over time due to constant mechanical loads and the natural aging of rubber. A worn or torn bushing may cause the following issues:

• Knocking, metallic, or squeaking noises from the suspension over uneven surfaces or during cornering.
• Vague, imprecise steering response and compromised handling stability.
• Abnormal, uneven tire wear due to altered wheel alignment and geometry.
• Slight vehicle pulling or vibrations during braking.

To maintain driving safety and maximize tire life, immediate replacement of damaged or aged bushings is recommended. Due to symmetrical suspension loading, it is advisable to replace bushings in pairs per axle.