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

Problem overview

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.

10 people reported this problem

1 comment

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Mercury Mariner vehicles with this problem

4 model years affected

Average mileage: 90,333 miles

(36,000 - 120,000)

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Submitted by Andy Y · May 29, 2025

Published by RepairPal

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

Problem overview

Mercury Mariner vehicles with this problem

Need a diagnosis? Trust our Mercury experts.

Search for another problem

Ask our experts about your Mercury.