Suspensia X47BJ0577 Suspension Ball Joint - Rear Upper

Rear Upper Ball Joint for Subaru Applications

The Suspensia X47BJ0577 is a rear upper suspension ball joint built for direct OE fit and OE look. It is pre-greased and uses a forged steel ball joint body with a steel housing, rubber dust boot, and pinch-style stud design for the specified Subaru rear upper position.

Compatible with select 2015-2022 Subaru Impreza, 2015-2021 Subaru WRX, 2016-2021 Subaru WRX STI, and 2015-2019 Subaru Legacy rear upper applications, this part is built for buyers looking for a precise suspension replacement. The X47BJ0577 also cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Key Features

• Forged steel construction for the ball joint body
• Steel housing with black rubber dust boot
• Pre-greased for initial installation
• Pinch-style ball joint stud type
• Press-on attachment method
• Non-greaseable design
• Plastic bearing material
• Direct OE fit and OE look

Detailed Description

Suspensia manufactures chassis parts to OE or better quality standards for the North American aftermarket, with production in a fully automated OE manufacturing facility in Turkiye. The X47BJ0577 rear upper ball joint is engineered for the Subaru Impreza, WRX, WRX STI, and Legacy rear suspension where a press-on, pinch-stud ball joint is required. Its forged steel and steel housing construction supports consistent fitment, while the rubber boot helps protect the joint from road contamination.

Use the part number X47BJ0577 when verifying the correct rear upper suspension ball joint for your vehicle. This part number is also helpful when searching for Subaru Impreza rear upper ball joint X47BJ0577, Subaru WRX rear upper ball joint X47BJ0577, or Subaru Legacy rear upper ball joint X47BJ0577.

What This Part Helps Address

• Excess play or looseness in the rear upper suspension joint
• Clunking or knocking from the rear suspension area
• Uneven rear suspension articulation
• Wear-related steering and handling instability from a deteriorated joint
• Boot damage that can expose the joint to contamination

Installation Notes and Tips

Confirm rear upper fitment before installation and match the press-on, pinch-stud design to the original suspension layout. Because this ball joint is not greaseable and does not include a grease fitting, it is intended for sealed-service use. Inspect the surrounding control arm and mounting surfaces for wear before pressing the joint into place.

Quality Assurance

Suspensia chassis components are produced in an IATF 16949:2016, ISO 9001:2015, ISO 14001:2015, ISO 45001:2018, and ISO 50001:2018 certified facility. The brand states its parts are direct OE fit replacements manufactured to OE or better quality standards.