Brake Wear Indicator (Brake Pad Wear Sensor) for different automobiles
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Your Brake Wear Indicator (Brake Pad Wear Sensor) worn out? » Read more about common malfunctions • Repair • Replacement manual
Always play it safe, with the brake wear indicator
In a disc brake system, brake pads are pressed against a rotating disc. As a result, material is worn off of the brake pad and the brake disc during each braking operation. If the brake pads are completely ground down, the vehicle's braking performance will be very poor. Thus a brake wear indicator helps drivers determine when a brake pad must be replaced before it's too late.
Brake wear indicator: Simple technology, significant effect
A completely ground down brake pad makes a loud noise every time the driver steps on the brake pedal. An unbearable grinding noise should provide any driver a clear warning sign to take the vehicle to the next workshop as soon as possible. At this point, road safety is no longer ensured: The braking distance is very long due to the missing brake pads and the brake discs wear out quickly.
Thus, the brake wear indicator offers a technically simple means of noticing when the brake pads need to be replaced before it is too late. There is a contact wire inside the brake pad, which will come into contact with the brake disc as soon as the brake pad wears down to a certain thickness. This will close an electric circuit and thus trigger a signal in the vehicle's dashboard. This ensures that the driver has enough time to safely take his vehicle to the nearest shop. Components of the brake wear indicator The brake wear indicator consists of the following components:
- - Wear contact
- Brake disc
- Brake pad
- Wiring running to the interior
- Indicator on the dashboard
Whenever changing the brake pads, the brake disc should also be checked. Usually, the brake disc is due for replacement no later than upon the second brake pad replacement. The minimum thickness of the brake disc depends on the vehicle, for these components feature different designs. Internally ventilated brake discs, for example, are considerably thicker than simple brake discs without ventilation. Deep grooves and indentations are also detrimental to the braking effect. A completely overhauled brake, including pads, wear contacts and brake discs, is sure to provide the necessary driving safety. Since overhauling brakes involves removing the wheel, this task offers a good opportunity to check the axle boots, tie rods and ball joints.