Suspensia X31BJ0402 Suspension Ball Joint - Front Upper

Suspension Ball Joint for Mercedes-Benz Front Upper

Suspensia X31BJ0402 is a suspension ball joint built for front upper applications on select Mercedes-Benz models. It features a threaded M18 stud, a steel housing, a rubber dust boot, and a pre-greased design for direct replacement service.

Manufactured in Turkey in IATF16949 certified factories, this part reflects Suspensia’s OE-focused production background through ISC Industries, which supplies Tier 1 and Tier 2 customers worldwide.

Key Features

• Part number: X31BJ0402
• Stud thread size: M18
• Pre-greased for installation-ready service
• Dust boot included; black rubber boot material
• Steel housing with composite bearing material
• Locking nut included
• Non-greaseable, regular grade design
• Threaded ball joint stud type

Detailed Description

Suspensia X31BJ0402 is a front upper suspension ball joint for Mercedes-Benz 300SD, 300SDL, 300SEL, 350SDL, 380SE, 380SEC, 380SEL, 420SEL, 500SEC, 500SEL, 560SEC, and 560SEL applications. It is built with a steel housing, black rubber boot, and composite bearing material to support steering and suspension articulation in the original mounting location. The M18 threaded stud and included locking nut simplify replacement on the specified front upper position. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Common Issues This Part Can Address

• Front suspension looseness or play
• Clunking or knocking from the upper suspension area
• Uneven tire wear related to worn ball joint movement
• Steering instability or wandering at the front end
• Excessive suspension joint movement during braking or cornering

Installation Notes and Tips

Verify the front upper position and M18 threaded stud specification before installation. Inspect the surrounding control arm and mounting points for wear, and replace any damaged components as needed. Because this ball joint is pre-greased and non-greaseable, no grease fitting is provided. Confirm vehicle-specific fitment by model and year before service on Mercedes-Benz 300SD, 300SDL, 300SEL, 350SDL, 380SE, 380SEC, 380SEL, 420SEL, 500SEC, 500SEL, 560SEC, and 560SEL applications.

Quality Assurance

Suspensia parts are manufactured in Turkey in IATF16949 certified factories, with production backed by ISC Industries’ experience supplying OE Tier 1 customers including Ford, Fiat/Chrysler, Volkswagen Group, and Renault/Nissan, along with global Tier 2 suppliers.