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

Problem Description and Possible Solution

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.

Problem Data
RepairPal Verified
Average mileage: 90,333 (36,000–120,000)
4 model years affected: 2005, 2006, 2007, 2008
7 people reported this problem
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Knocking noise from steering area when going over any bump.