Locate Toyota 4 Runner Tie rod ball joint. Replace Toyota 4 Runner Upper ball joint & Toyota 4 Runner Replace upper and lower ball joint. Maintaining the upper ball joint of your Toyota 4Runner is critical for a smooth driving experience, as it allows for proper suspension articulation. Regular lubrication and inspection for wear or tear can significantly extend its lifespan. If you experience uneven tire wear, clunking noises, or erratic steering, it may be time to consider a replacement. When selecting a new upper ball joint, opt for premium materials like hardened steel for durability. Installation requires precision, so ensure correct fitment and consider professional installation to guarantee optimal performance and safety. With a variety of aftermarket options available, choose a ball joint that offers the perfect balance of quality and value to enhance your 4Runner's reliability.