Front Upper Control Arm Ball Joint & Tie Rod End For 1989-1997 Ford Thunderbird Headlight Assemblies What's the function of control

What's the function of control arm

OLDSMOBILE CUTLASS SUPREME 1990-1991

UPC: 707427978065

starting with the driver side

Front Upper Control Arm Ball Joint & Tie Rod End For 1989-1997 Ford Thunderbird Headlight Assemblies What's the function of controlProduct Specifics UPC: Does not apply Manufacturer Part Number: EC80955801 Placement on Vehicle: Front+Upper+Left+Right+Lower+Inner+Outer Universal Fitment: No Manufacturer Warranty: 10 Years Features: Greasable Items Included: Mounting Hardware Custom Bundle: No Type: Control Arm & Ball Joint Assembly Interchange Part Number: K8596,K8598,K80053,K80055,EV127,ES3004RL OE OEM Part Number: suspension control arm car,replacing control arm ball joint