The safety of a motor vehicle is paramount. Regardless if the BMW 3 Series are economic holes, certain maintenance works are vital. In this article we will explain to you when to replace the brake discs of your BMW 3 Series? To get this done, to begin with, we will discover what the brake discs of your motor vehicle are used for, then, when to replace the brake discs of your BMW 3 Series, and, finally, how to change them with new ones.


Interest of the brake discs of a BMW 3 Series

We begin our article content by explaining what the brake discs of a BMW 3 Series are used for, it will allow you to understand why it is essential to make certain that they are always in good working conditions.
Brake discs are the most important part of your braking system. In fact, braking on an BMW 3 Series is hydraulic, it is a system of hoses and pressurized oil that will come into action when you press your brake pedal. This pressure will actuate a piston that will push the brake pads on your brake disc which is placed on your wheel. When the brake pads will pinch the discs which will trigger your BMW 3 Series to brake.

When to replace the brake discs of a BMW 3 Series?

We will now move on to the part that most certainly attracts you to this content page, namely, when replacing the brake discs of a BMW 3 Series? How we revealed it to you just before, the brake discs and pads work in osmosis, however these two components are wearing parts and they will, after some time and especially the friction when braking wears out and loses braking power. We will now highlight the different solutions to know when to change them:

  • We consider that generally speaking the brake discs should be changed every 80, 000 – 100, 000 km on a BMW 3 Series , however it is essential to know that dependent on your driving style and the type of journey this can change substantially. In fact, if you specifically drive on the motorway and your brakes are just slightly used, this value can increase, on the other hand, if you just drive in built-up areas, it can decrease.
  • A basic and successful technique to find out the condition of the brake discs on your motor vehicle is during the technical inspection. In fact this thorough control checks the state of your brakes and the controller will tell you if they are in good condition or need to be changed.
  • A simple visual technique to know when to replace the brake discs on your BMW 3 Series is to remove the wheels after the vehicle has been set on stands. Once removed, you will be able to access your discs and check their condition. If they have any big scratches or deformations you will have to replace them. Otherwise the second indicator to check is to measure the depth of the disk in relation to its edge, if this value exceeds 1 mm you will have to change them by new ones.


How to replace the brake discs on your BMW 3 Series?

Finally, to end this content page we will fairly quickly show you how to replace the brake discs of your BMW 3 Series. You must know that if you replace the brake discs of your motor vehicle, you will absolutely have to change the brake pads of your BMW 3 Series, don’t think twice to seek advice from our content page which points out you how to make this replace.
As far as changing discs is concerned, here are the most important steps to stick to:

  • Put your BMW 3 Series on stands, take off the wheels you want to action on.
  • Using a large flat screwdriver, pry on your brake pads to compress the caliper piston as much as possible and have enough play to make all your changes.
  • Using large Torx bits, take out the two nuts that lock the upper part of your brake caliper, take out it.
  • Remove your brake pads, then unlock your brake discs thanks to the two torx screws on the side of the disc, you may need a mallet to remove the discs.
  • Replace the discs and tighten them with the new torx screws provided, replace your pads, reassemble the upper part of the caliper and tighten everything tightly.
  • Mounting your wheels, and remember to do a 500-kilometer brake break-in before braking hard.

In the event that you have any further questions about the BMW 3 Series, do not hesitate to consult our BMW 3 Series category.