Hearing deep knocking sounds in the front suspension is a warning sign that should not be ignored. These noises may appear when driving on uneven roads, during turns, or while braking. Not only do they create discomfort while driving, but they also indicate potential issues with the suspension system. If the problem is not addressed in time, it could lead to costly repairs and even pose a safety risk on the road.

In this article, we will discuss the main causes of knocking noises in the suspension, their consequences, and diagnostic methods.

Main Causes of Deep Knocking Sounds in the Front Suspension

1. Worn Shock Absorbers and Mounts

Shock absorbers are responsible for absorbing road impacts and maintaining vehicle stability. Worn or faulty shock absorbers can cause deep knocking noises, especially when driving over potholes or speed bumps.

How to check?

If the car continues to bounce after pressing down on the hood or if the suspension works unevenly, the shock absorbers likely need to be replaced.

2. Worn Control Arm Bushings

Control arm bushings are rubber-metal sleeves that connect suspension arms. They absorb vibrations and impacts, so their wear can lead to knocking sounds when driving over uneven surfaces.

How to check?

If the steering has become less precise, the car “wanders” on the road, or you hear a characteristic knocking sound, check the bushings for cracks or tears.

Глухі стуки в передній підвісці

3. Problems with Stabilizer Links

Stabilizer links help reduce body roll during turns. If they are damaged or have excessive play, you may hear deep knocking sounds when driving over bumps.

How to check?

If the car leans excessively in turns and knocking noises come from underneath while driving on uneven roads, the issue could be with the stabilizer links.

4. Worn Ball Joints

The ball joint is a pivot that connects the shock absorber strut or control arm to the steering knuckle. It allows free movement of the suspension while maintaining vehicle control. When the ball joint wears out, it can produce knocking noises when turning the steering wheel or hitting bumps.

How to check?

At a service center, mechanics can check for play in the ball joint – if detected, the part should be replaced.

5. Worn Wheel Hub Bearings

Wheel hub bearings ensure smooth wheel rotation. When they wear out, they can cause not only deep knocking sounds but also a humming noise while driving.

How to check?

Listen for unusual noises while driving. If the humming or knocking sound changes with speed, the issue might be in the bearings.

6. Loose or Worn Suspension Mounts

If bolts connecting control arms, struts, or the subframe become loose over time or after a repair, it can cause knocking noises while driving.

How to check?

A service center should conduct a suspension inspection to rule out loose mounts.

Consequences of Ignoring the Problem

If knocking noises in the suspension are ignored, it can lead to serious issues:

  • Increased tire wear – improper suspension operation can cause uneven tire wear.
  • Loss of control – suspension problems can affect steering response.
  • Damage to other components – for example, if bushings wear out completely, they can damage control arms.

To avoid expensive repairs, visit a service center at the first signs of trouble!

How Is a Deep Knocking Noise in the Front Suspension Diagnosed?

At “Autopark-Service” in Lviv, we conduct a comprehensive suspension inspection to identify issues early. The diagnostics include:

  • Visual inspection of the suspension – checking the condition of all suspension components.
  • Checking for play and loose mounts – identifying worn parts.
  • Computer diagnostics – analyzing data from the onboard computer.
  • Test drive – assessing the vehicle’s behavior on the road.

If you hear knocking sounds in the front suspension – contact us for diagnostics and repairs!

Your car’s safety is in good hands! Book a diagnostics appointment now!