QX60 Front Suspension Clunking Over Bumps - 2020 Model

ClearTheCode admin answer:

A clunking or rattling noise from the front suspension is a common complaint and can be attributed to several components. Here’s a guide to understanding and addressing the issue in your 2020 Infiniti QX60:

1. Common Causes of Front Suspension Noise:

   • Sway Bar End Links: These are a very frequent culprit. The bushings or ball joints in the end links can wear out, causing a clunking sound as the sway bar moves.
   • Control Arm Bushings: Worn or cracked bushings in the lower or upper control arms can allow excessive movement, leading to noise and potentially affecting alignment.
   • Ball Joints: Worn lower or upper ball joints can create a clunking sound, especially when the suspension articulates over bumps.
   • Strut Mounts/Bearings: The top strut mounts or their associated bearings can wear out, leading to clunking or popping noises, particularly when turning or going over bumps.
   • Loose Components: Sometimes, a loose bolt on a suspension component or even a loose heat shield can mimic suspension noise.
   • Damaged Strut/Shock Absorber: While less common for just a clunk, a failing strut could contribute to noise, though it usually also impacts ride quality.

2. What You Can Check (Carefully):

   • Visual Inspection: With the vehicle safely on a level surface, look for obvious signs of wear like cracked rubber bushings, leaking struts, or loose components. You might need to jack up the car to get a better look at the suspension components.
   • Bounce Test: Push down firmly on each corner of the car. If it bounces more than 2-3 times, your struts might be worn.

3. When to See a Shop:

   • Professional Diagnosis: It's highly recommended to have a qualified mechanic inspect the suspension. Diagnosing suspension noises can be tricky as sounds can travel.
   • Safety Concern: Worn suspension components can affect handling, braking, and tire wear, posing a safety risk if left unaddressed.
   • Tools Required: Many suspension components require specialized tools for proper diagnosis and replacement.

A technician will typically lift the vehicle, inspect all bushings, ball joints, end links, and strut components for play or damage. They can often pinpoint the exact source of the noise by manipulating the suspension while the vehicle is on a lift.