With correctly adjusted brakes and a correctly working brake system, the pedal travel to the point of brake application should be 1-3/16 in. to 1-9/16 in. (30 to 40 mm). Whenever the brake pedal travel exceeds this value, have the brake system checked.
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.
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 authorized Porsche dealer will be glad to offer you floor mats of the correct size including a securing possibility.
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 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 overheat and lose braking power.
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.
Moisture, road salt or grit on brakes affects braking.
Brakes will dry after a few cautious brake applications.
Driving through water may reduce the traction. Moisture on brakes from road water, car wash, or a coating of road salt or grit may affect braking efficiency.
Cautiously apply brakes to test and dry the brakes after exposure to road water, etc.
Loss of Braking Power
The brake booster is ready for operation only while the engine is running.
If the engine is switched off or there is a defect in the brake booster, much greater force has to be applied to the pedal when braking.
Vehicles with defective brakes must not be towed and must be transported on a flat bed.
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 (position 1) and verifying that the warning light illuminates.