Timken HA590138 Wheel Bearing and Hub Assembly - Front Left

Timken HA590138 Wheel Bearing and Hub Assembly Overview

The Timken HA590138 wheel bearing and hub assembly is engineered for reliable performance in select Lexus models. Designed as a non-driven hub, this assembly ensures precise fitment and durability for vehicles such as the Lexus GS300, GS350, GS430, GS450h, GS460, IS250, and IS350.

• Flange bolt hole quantity: 4 for secure mounting
• Wheel pilot diameter: 2.363 inches (60.03 mm)
• Brake pilot diameter: 2.440 inches (61.98 mm)
• Wheel stud quantity: 5 for proper wheel attachment
• Hub pilot diameter: 2.910 inches (73.92 mm)
• Flange offset: 2.169 inches (55.10 mm)
• Flange diameter: 5.510 inches (139.97 mm)
• Bolt circle diameter: 4.511 inches (114.60 mm)
• Drive type: Non-driven hub assembly

Detailed Specifications and Fitment

This Timken wheel bearing and hub assembly (part number HA590138) is specifically designed for non-driven axle applications on various Lexus models, including the GS and IS series. The precise flange bolt hole quantity of 4 and a 5-stud wheel configuration ensure compatibility with the factory wheel setup. The wheel pilot diameter of 2.363 inches (60.03 mm) and brake pilot diameter of 2.440 inches (61.98 mm) provide accurate centering for the wheel and brake components, reducing vibration and improving safety. The hub pilot diameter measures 2.910 inches (73.92 mm), supporting proper hub alignment. Additionally, the flange offset of 2.169 inches (55.10 mm) and flange diameter of 5.510 inches (139.97 mm) are engineered to match OEM specifications, ensuring a seamless fit on the bolt circle diameter of 4.511 inches (114.60 mm).

Common Applications and Problem Resolution

• Replacement for worn or damaged wheel bearing and hub assemblies on Lexus GS300, GS350, GS430, GS450h, GS460, IS250, and IS350
• Eliminates wheel noise caused by bearing wear
• Resolves wheel vibration and uneven tire wear issues
• Restores proper wheel alignment and brake rotor positioning
• Prevents hub assembly failure that can lead to unsafe driving conditions

Installation Notes and Tips

When installing the Timken HA590138 wheel bearing and hub assembly, ensure the vehicle is securely lifted and supported. Remove the existing hub assembly carefully to avoid damage to surrounding components. Verify that the flange bolt holes and wheel studs align correctly with the vehicle’s wheel and brake components. Use a calibrated torque wrench to tighten bolts to manufacturer specifications. It is recommended to inspect the axle and suspension components during installation for any additional wear or damage.

Quality Assurance and Warranty

Timken manufactures the HA590138 wheel bearing and hub assembly to meet or exceed OEM standards for fit, form, and function. This part undergoes rigorous quality control testing to ensure durability and performance under normal driving conditions. While specific warranty details may vary, Timken typically offers a limited warranty covering defects in materials and workmanship. Consult Timken’s official documentation or authorized distributors for exact warranty terms.