Delphi TC4240 Suspension Ball Joint - Front Lower

Delphi TC4240 Front Lower Ball Joint

Delphi TC4240 is a standard replacement suspension ball joint built for the front lower position on select Smart Fortwo models. It combines OE-based dimensional analysis with material testing to support proper fit and consistent steering and suspension performance.

Key Features

• Fits 2008-2015 Smart Fortwo, front lower
• Delphi TC4240 suspension ball joint for OE-style replacement
• Press-in mounting type with included mounting hardware
• Pre-greased design with rubber dust boot
• Counterclockwise (left) thread direction
• Standard replacement grade with plastic bearing type
• Tapered stud design for secure suspension connection

Detailed Description

Delphi TC4240 is engineered as a front lower suspension ball joint for the 2008-2015 Smart Fortwo. Delphi applies OE-focused engineering to its aftermarket steering and suspension parts, using dimensional and material analysis to help maintain proper compatibility with the original suspension layout. The TC4240 is a press-in, standard replacement ball joint with a pre-greased construction, rubber dust boot, and included mounting hardware. It is designed with a tapered stud, threaded stud design, and counterclockwise thread direction. This part cross-references Dorman - Premium BJ39055PR for the same application.

Common Problems This Part Can Address

• Front suspension looseness or play at the lower control arm connection
• Clunking or knocking noises from the front suspension
• Uneven tire wear caused by worn ball joint movement
• Imprecise steering feel in a Smart Fortwo front suspension system
• Inspection failure due to excessive joint wear or boot damage

Installation Notes and Tips

Fits 2008-2015 Smart Fortwo, front lower. This is a press-in ball joint, so proper removal and installation tools are recommended for service. Confirm the left-hand thread direction, tapered stud dimensions, and front lower position before installation. Always inspect the surrounding control arm and related suspension components for wear before completing the repair. Delphi TC4240 is also referenced by part number 451 330 00 10 in interchange data.

Quality Assurance

Delphi subjects its OE-based steering and suspension components to temperature extremes below -40 degrees C and above 120 degrees C, along with extended salt-spray exposure testing. That testing approach supports durability validation for the Delphi TC4240 and reflects the brand’s OE engineering background.