Front Passenger Side Upper Control Arm and Ball Joint Assembly (MCSOE28) by Motorcraft®. Quantity: 1 per Pack. Control Arm undergo a series of demanding tests to ensure they meet strict Ford O.E. quality, performance and durability standards that include Key Life testing to the equivalent of 10-years/150,000 miles for passenger cars and light trucks. Motorcraft Front Suspension Arms are also subjected to a long list of punishing tests that include test-to-failure endurance, performance and materials durability tests to ensure their long lasting quality and operation.