A braking system that is in top-notch condition is vital for the safety of you and your passengers. If you feel your car shake or shudder when using the brakes, it should go without saying that you should get your car checked out by a professional mechanic at the earliest opportunity.
The most likely cause of the vibration is warped rotors (brake discs). Rotors are the large, rotating circular metal plates against which brake pads are pressed during braking.
New rotors have a very smooth and even surface but, over time, the friction caused by the pads pushing against the rotors causes both components to wear. The rotors should wear evenly, and at a much slower rate than brake pads, but the friction and tremendous heat generated during braking can also cause them to lose their level surface.
When this happens, the brake pads won’t have a consistent and even grip on the rotor, and this produces a shake through the steering wheel as the pads’ grip strengthens and weakens. A shuddering effect may also be felt in the brake pedal.
These are signs that the braking system is not performing at its best. If the problem is not rectified it can degenerate and become extremely dangerous.
WILL I NEED TO GET THE ROTORS REPLACED?
Maybe. Depending on how bad the wear, it could be that the rotors may just need to be ‘machined’, which means a qualified technician will ‘shave’ the surface of the rotor to make it smooth and even once more.
If, however, the warping is too severe, or the rotor material becomes too thin, then a replacement will likely be required.
Your qualified mechanic or brake specialist will be able to advise you of the best option.
HOW LONG SHOULD ROTORS LAST?
That depends on several factors, including the quality of rotors installed on your car, the environment you are driving in, and your driving style. If your regular commute means you are driving hilly roads, or your driving style sees you braking hard and often, then the braking system will be put under plenty of stress and components will suffer wear and tear more quickly.
Rotors can last for 100,000kms or more, but you shouldn’t assume that they will. Having the rotors, and the rest of the braking system, checked regularly – at least at every scheduled service – is the sensible option. Remember though, that should you feel any shaking or shuddering, or any other unusual motion or noise when braking, at any time, you should get to a qualified mechanic as soon as possible to get things examined.
WANT TO LEARN MORE?
MTA Queensland’s Vehicle Maintenance course is designed for those who are interested in gaining valuable information and learning good practices for everyday vehicle use. The result: a safer journey with fewer breakdowns and repairs. If you have ever wanted to learn how to carry out preventative maintenance, then this course is for you.
15 November 2019
Please note the information contained on this page is general in nature and does not take into account your specific needs or circumstances. You should consider whether the information is appropriate to your needs, and where appropriate, seek professional advice.