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Cayenne

2009-2012 Boxster – Manual

2009-2012 Boxster – Manual

Page: 45

With correctly adjusted brakes, and a correctly working brake system, the pedal travel to the point of brake actuation should be 1-3/16 in. to 1-9/16 in. or 30 to 40 mm.

Whenever the brake pedal travel exceeds this distance, have the brake system checked.

Brake pedal

Obstruction of Brake Pedal

Unsuitable or incorrectly fixed floor mats or objects can reduce the travel of the brake pedal or prevent you applying the brake pedal.

Any obstruction of the brake pedal could increase the stopping distance.

  • Always check the movement of the brake pedal before driving and make sure that it is not obstructed by a floor mat or any other object.
  • Secure the floor mat to prevent it from sliding into positions that could interfere with the safe operation of your vehicle.
    Your Porsche dealer will be glad to offer you nonskid floor mats of the correct size including a securing possibility.

Information
In case one of the two brake circuits fails, increased pedal travel is required to bring your vehicle to a full stop.


Riding the Brakes

  • Before descending a steep grade, reduce speed and shift the transmission into a lower gear or driving position to control speed.
  • Do not "ride the brakes" by resting your foot on the pedal when not intending to apply brake pressure.
  • Do not hold the pedal down too long or too often. This could cause the brakes to get hot and not function properly.

Brake booster
The brake booster assists braking only when the engine is running.
When the car is moving while the engine is not running, or if the brake booster is defective, more pressure on the brake pedal is required to bring the car to a stop.

If this happens, ABS and PSM will also not operate.

Moisture or road salt on brakes affects braking. Brakes will dry after a few cautious brake applications.

Wet Brakes

Driving through water may reduce the traction. Moisture on brakes from road water, car wash, or coating of road salt or grit may affect braking efficiency.

  • Cautiously apply brakes to test brakes after exposure to road water, etc.

Brake wear
Your car has excellent brakes, but they are still subject to wear. The rate at which they wear depends on how the brakes are used.

  • Have the brake system inspected at the intervals recommended in your Maintenance Booklet.

Brake system warning light
You can check the functionality of the brake system warning light by switching the ignition to the "On" position and verifying that the warning light illuminates.

Warning light USA
Warning light Canada

If the warning lights in the instrument panel and onboard computer stay on when the engine is running or come on while driving, the brake pads are worn excessively.

  • Do not continue to operate the vehicle. Have your authorized Porsche dealer inspect or replace the brake pads.
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