Clunking Over Bumps? Infiniti Q50 Front Suspension Guide

Start with the usual Q50 front-end suspects

On an Infiniti Q50, a clunk over bumps and potholes is most often a worn suspension joint or bushing letting metal knock against metal. The first things I check are the sway bar end links and bushings, because they are common wear items and easy to inspect. Next come the lower control arm bushings and ball joints, then the strut mounts and strut bearings. Also look at the front struts or shocks for leaks or loose top nuts, the tie rod ends, and the brake caliper hardware. On some cars, a loose subframe bolt or steering rack mount can mimic a suspension clunk, so do not overlook those.

• Check first: sway bar end links and bushings, control arm bushings, ball joints, strut mounts, and strut top nuts.
• Then check: tie rods, steering rack mounts, subframe bolts, caliper bolts and pads, and any loose splash shields.
• Sensors: there is no ordinary suspension sensor that causes this clunk, but if your Q50 has adaptive dampers or ride-height components, inspect the sensor mounts and wiring. Scan for chassis or steering codes only if a warning light is on.

A quick road test with a helper listening outside can help locate the noise, but a pry bar and shake test with the front safely lifted is better. Grab each front wheel at 12 and 6 o'clock, then 3 and 9 o'clock, and feel for play. Inspect bushings for cracks, torn rubber, or shiny rub marks, and look for leaking struts or missing hardware. If the clunk is mild and only over sharp bumps, you can usually drive cautiously to a shop, but if you hear loud banging, feel steering wander or vibration, see a broken spring, or find loose wheel or suspension hardware, stop driving and have it inspected right away.

This material is AI-generated and for informational purposes only — it does not replace an in-person diagnosis by a qualified mechanic.