Car Problem Reports

Mercury Mariner Knock Noise from Steering When Turning, Going Over Bumps

Mercury Mariner Problem
6 Reports
Me Too

Model Years Affected: 2005, 2006, 2007, 2008

Average Mileage: 90,333 mi (36,000 mi - 120,000 mi)


A defective power steering return line can cause a knocking noise when turning or going over bumps, especially when the engine has reached normal operating temperature. The power steering return line should be replaced.