can someone tell me why when u add a mazdaspeed front bumper is it not possible to have the parking sensors working. There must be a way around this.

 

Most likely because the Mazdaspeed bumper does not have holes and mounting points for the sensors. The only way around this is to drill holes and fabricate mounting brackets yourself. That's what I did on my 540i. That model year didn't come with front PDC; I drilled holes in the bumper and mounted the sensors myself.
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SensualLady