MAS Chassis B90255 Suspension Ball Joint - Front Upper

OE-Style Front Upper Ball Joint

The MAS Chassis B90255 suspension ball joint is a precision-engineered replacement for the original equipment design on select Toyota trucks and SUVs. It is built with a steel housing, polymer bearing material, and a rubber dust boot to support consistent front suspension operation on Toyota Tacoma, 4Runner, Tundra, and Sequoia applications.

Fits 1995-2004 Toyota Tacoma, front upper; fits 1996-2002 Toyota 4Runner, front upper; fits 2000-2006 Toyota Tundra, front upper; fits 2001-2007 Toyota Sequoia, front upper.

Key Features

• Steel construction for suspension service durability
• Press-in mounting type with a 43.3 mm housing press fit diameter
• Tapered stud design with 14 mm stud thread diameter and 1.5 thread pitch
• Rubber dust boot helps protect the joint from road contamination
• Polymer bearing material for standard suspension service
• Castle nut, cotter pin, and snap ring included in the package contents
• Non-greaseable, non-adjustable standard-grade design

Product Details

MAS Chassis B90255 is a front upper suspension ball joint engineered as a direct replacement for specific Toyota suspension assemblies. It cross-references MOOG Chassis Products K90255 and Delphi TC1792 for the same application. This part number is commonly searched for Toyota Tacoma front upper ball joint replacement, Toyota 4Runner front upper ball joint replacement, Toyota Tundra front upper ball joint replacement, and Toyota Sequoia front upper ball joint replacement.

Common Problems It Can Address

• Front-end looseness or play from a worn upper ball joint
• Clunking or popping noises from the front suspension
• Uneven tire wear related to suspension joint wear
• Steering instability caused by excessive joint movement
• Inspection failure tied to worn suspension components

Installation Notes and Tips

This is a press-fit suspension ball joint, so proper removal and installation tools are required. Confirm the vehicle application, front upper position, and housing press fit diameter before installation. The tapered stud uses a castle nut and cotter pin retention setup, and the included snap ring should be installed as specified by the service procedure. Always inspect the surrounding control arm and hardware for wear before completing the repair.

Quality Assurance

MAS Chassis states that this ball joint is precision-engineered and rigorously tested for reliable OE replacement performance on the listed Toyota applications. The B90255 is built to standard suspension grade specifications for consistent fit and service.