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if you read the porsche manual;
those with factory fitted reverse parking sensors will beep once intially when you stick
gear into reverse.
then you should get the normal distance tones.
Mine just gives the initial beep, which emanates from the rear of the car
however my mechanic and VIN details state it's aftermarket sensors.
just want to know if factory fitted sensors give the initial beep and tones from the front, form a piezo under the dash or wherever
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