Description
OEM part number 6904023. This is a genuine used BMW PDC control module (parking sensor ECU) for the E39 5 Series. Each unit is removed from a running vehicle, tested, and despatched in good used condition.
The PDC control module is the central processor for the parking distance warning system. It supplies power to and communicates with each ultrasonic sensor mounted in the front and/or rear bumper, measuring the time delay of reflected echo pulses to calculate the precise distance between the vehicle and surrounding obstacles. The module converts this data into graded audible alert sequences — tones that increase in frequency as the gap narrows — and, on vehicles with a visual display, triggers the on-screen representation of obstacle proximity in the instrument cluster or iDrive system. Communication with the body control module and instrument cluster occurs over the CAN bus.
Common symptoms of a faulty PDC module include the parking sensor system failing to activate when reverse is selected, no audible tones during close-range manoeuvring, a continuous warning beep with no obstruction present, a PDC warning indicator or amber symbol displayed in the instrument cluster, or one or more sensors appearing dead while the remaining sensors operate normally.
Supplied in good used condition. It is essential to cross-reference the OEM part number against your specific vehicle build and any dealer option codes before ordering, as PDC modules vary by specification and are often VIN-coded. A professional technician should carry out the fitting. Coding using BMW ISTA diagnostic software is necessary after installation on most applications; the system will not operate correctly or may log fault codes if coding is omitted. 14-day returns are accepted on unmodified, uninstalled parts.
Returns accepted only for genuine faults — faulty on arrival, not as described, or wrong part supplied — requested within 14 days, with all 3 anti-tamper stickers intact. No returns for change of mind, incorrect installation, coding/programming, or buyer compatibility errors; checking compatibility (OEM number, firmware, vehicle) is the buyer’s responsibility. Full policy: https://giantparts.eu/refund-and-returns/
