Dorman 538-807 Suspension Ball Joint - Front Lower or Front Upper

Dorman 538-807 Suspension Ball Joint

Dorman 538-807 is a threaded suspension ball joint engineered as a standard replacement for the original equipment on select Smart vehicles. It is built from steel with a rubber dust boot and mounting hardware included, making it a direct-service part for front suspension repair on Smart Fortwo, Smart Cabrio, Smart Roadster, Smart City-Coupe, and Smart Crossblade applications.

• Steel construction for durable suspension service
• Threaded, bolt-in design for OE-style replacement
• Dust boot included to help protect the joint from contamination
• Standard suspension grade replacement
• Mounting hardware included
• Wrench size: 12 mm
• Tapered stud design
• Compatible with front upper and front lower positions, depending on vehicle application

Fitment and Application Details

This suspension ball joint is used on specific front suspension positions for 2003-2007 Smart models. Fits 2006-2007 Smart Fortwo, front lower; fits 2005 Smart Cabrio, front upper; fits 2005 Smart Fortwo, front upper; fits 2005 Smart Roadster, front lower; fits 2004 Smart Cabrio, front lower; fits 2003-2004 Smart City-Coupe, front upper; fits 2004 Smart Crossblade, front lower; and fits 2004 Smart Roadster, front upper.

This part cross-references Mevotech Supreme MS10510 and MS50520 for the same application. The Dorman 538-807 part number is also useful when searching for a replacement ball joint for Smart Fortwo front lower or Smart Cabrio front upper suspension service.

What It Helps Repair

• Front suspension looseness or play
• Clunking or knocking from the front end
• Uneven tire wear caused by worn ball joint movement
• Steering response issues related to suspension wear
• Inspection failures tied to worn front suspension components

Installation Notes and Tips

Verify the vehicle year, model, and suspension position before ordering. This is a bolt-in, threaded ball joint with a tapered stud, so the correct fit depends on the exact front upper or front lower application listed for the vehicle. Confirm the 12 mm wrench size and compare the original part dimensions, including length, width, and maximum outside diameter, before installation. The dust boot is included, while a grease fitting, cotter pin, and castle nut are not included.

Quality Assurance

Dorman states that this suspension ball joint is precision-engineered and rigorously tested to provide a reliable replacement for the original equipment on specific vehicles. The part is built as a standard replacement component for front suspension service on the listed Smart applications.