Front End Knock Noise When Striking Bump (Replace Engine Mounts)

Some customers may comment on a knock noise from the front of the vehicle that occurs when striking a small raised road imperfection, such as a speed bump or a raised tar joint. The noise may be described as being similar to striking a heavy piece of timber and is experienced generally when both wheels strike the object simultaneously.

This condition may be caused by a cavitation condition within the hydraulic engine mounts.

Confirm the condition by test driving the vehicle. Following ATWM approval, replace the engine mounts with the P/Ns listed in the Parts Information section below. These new engine mounts feature a revised one way by-pass valve and a revised oil channel design.

Important: Prior to replacement of engine mounts for this condition, ATWM approval MUST be requested. Please ensure that your ATWM approval is recorded on the repair order to support the warranty claim.

For vehicles repaired under warranty, use: