Volvo S40 Shakes When Braking

Common Causes of Shaking in Your Volvo S40 During Braking and How to Resolve Them

Find Repair Location
Reviewed by
Bo Fader
Written by RepairPal Car Genius
Updated January 14, 2025
0%
55% chance it's the
Brake Rotor
0%
20% chance it's the
Brake Pad
0%
10% chance it's the
Old Brake Fluid
0%
15% chance it's
Something else
The most common reasons a Volvo S40 shakes when braking are bad brake rotors, bad brake pads, or a bad wheel bearing.
  • Brake Rotor: A warped or worn brake rotor can cause vibrations during braking and reduced stopping power.
  • Brake Pad: A worn or damaged brake pad can lead to reduced braking efficiency and increased stopping distances.
  • Old Brake Fluid: Old brake fluid can absorb moisture over time, leading to reduced braking performance and potential corrosion within the brake system.
Proper diagnosis will determine the exact cause of your symptom, saving you money on unnecessary repairs. The diagnostic experts at RepairPal Certified shops have the right tools and experience to solve any symptom.

Troubleshooting Shaking When Braking in a Volvo S40

When troubleshooting shaking while braking in your Volvo S40, begin with the simplest and most common causes. First, inspect the brake rotors for any signs of warping or uneven wear, as these are often the primary culprits behind vibrations felt through the steering wheel. If the rotors appear damaged, consider replacing them. Next, examine the brake pads; ensure they are not worn out and are installed correctly, as improper alignment can also lead to shaking. If these components are in good condition, move on to checking the wheel bearings. Worn wheel bearings can contribute to vibrations, so if you suspect they may be faulty, they should be replaced. Additionally, assess the vehicle's wheel alignment; misalignment can cause shaking during braking, and correcting it can significantly improve performance. Don’t overlook the suspension components, particularly the control arm bushings, as worn parts here can also lead to vibrations. Regular maintenance of the brake system is essential, so ensure that you are routinely checking and replacing worn parts. Finally, if you have recently installed new brake components, perform a bedding-in procedure through controlled hard braking to eliminate initial vibrations. If the shaking persists after these checks, it may be time to consult a professional mechanic for a thorough diagnosis and repair.

What Causes Shaking When Braking in a Volvo S40?

When your Volvo S40 exhibits shaking during braking, it can be both alarming and indicative of underlying issues that need attention. One of the most common culprits is warped brake rotors, which can cause noticeable vibrations, particularly at higher speeds. If you notice this symptom, inspecting the rotors for uneven wear or warping is a good first step. Additionally, control arm bushings may be to blame; worn or damaged bushings can lead to instability in the steering system, resulting in a shaky steering wheel when braking hard. Another potential issue is a shot bushing, which can produce a knocking sound during braking and should be checked for wear. Furthermore, while brake pads may appear to have sufficient material, they can still develop problems that lead to squeaking or uneven contact with the rotors, contributing to the shaking sensation. Lastly, don’t overlook other components such as wheel bearings, as they can also affect braking performance. For a thorough diagnosis, it’s advisable to conduct a visual inspection of these parts or consult a qualified mechanic to ensure your vehicle remains safe and reliable on the road.

Why is My Volvo S40 Shaking When I Brake?

When your Volvo S40 shakes while braking, it’s crucial to address the issue without delay, as neglecting it can lead to serious safety risks and further vehicle damage. The vibrations you experience may stem from warped brake rotors, which can significantly impair your braking efficiency, especially at higher speeds. Additionally, uneven deposits on the rotors or sticking brake calipers can exacerbate the problem, leading to inconsistent braking performance and potentially increasing your stopping distance. Ignoring these symptoms not only compromises your safety but can also result in more extensive repairs down the line, such as replacing rotors or calipers. Therefore, if you notice any shaking or vibrations, it’s advisable to conduct a thorough inspection or consult a professional to diagnose the issue accurately and ensure your vehicle remains safe and reliable on the road.

You’ve got options with RepairPal

Whether you need a more accurate auto repair estimate or help finding a reputable shop in your area, we’ve got you covered.