BMW E46 Park Distance Control Unit (PDC) & Gong Chassis Wire Harness

We recently had some requests to save this wiring from chassis harnesses if we could. This option doesn’t appear to be very common and until recently we never paid much attention to it beyond simply removing it when it was present as it wouldn’t be needed on a race car. Be sure to read all of the following details and notes.

This is the complete, uncut, Park Distance Control Unit (PDC) & Gong wire harnesses removed from a LHD E46 chassis harness that was being thinned for a racecar*. This wiring can be added to another E46 to retrofit PDC. There is a separate PDC wire harness on the rear bumper which is not included and you will need to alternatively source one.

This item includes both of the following harnesses:

A81 – Park Distance Control Unit (PDC), X300, 12-pin, Black Plug

• 1 – 0.50 mm² Green/White – Fuse 24 (5A), Ignition Switched Power**
• 4 – 0.35 mm² White/Red/Yellow – X10116, Comb Splice, K-Bus – Above Fuse Box
• 6 – 0.50 mm² Brown/Black – X10012, Ground – Transmission Tunnel
• 8 – 0.35 mm² Blue/Gray – X363, 1-pin Black Plug – H10, Gong
• 12 – 0.50 mm² Blue/Yellow – 428, Comb Splice, Reverse Light – Above Fuse Box
  • Per the wire diagrams we checked this wire is used on vehicles up to 02/2003 while this wire is omitted on vehicles from 03/2003. If this wire isn’t needed in your install then simply do not connect it at the comb splice.
  • In certain situations you may also need to add the BMW E46 Instrument Cluster Reverse Indicator Wire

H10 – Gong, X522, 3-pin, White Plug

• 1 – 0.50 mm² Brown – X173, Ground – Left Rocker Panel (Front)
• 2 – 0.50 mm² Black/Red – X11176-14, 18-pin White Plug – A81, Instrument Cluster (Small)
• 3 – 0.50 mm² Red/Yellow – X10189, Comb Splice, Consumer Load – Above Fuse Box

Notes:

 – If there is more demand for this harness than we can salvage from stock harnesses we will build this harness at a slightly higher price. Some of the wire colors will not be exactly the same as OEM.

* This wire harness came out of a M3 Coupe, and will work in either a Coupe or Sedan. This harness will also work in a convertible but all of the wires will be longer than needed as the PDC Module is located further forward. At this time we are unsure if this harness will work in a Wagon with the PDC Module located towards the center of the luggage compartment vs the right hand side of the trunk in a Coupe or Sedan. If these wires weren’t long enough in the wagon perhaps alternatively routing the wires will work. If the harness was unaltered it could be returned. If the wires do need to be longer for the wagon, and we start to produce this then we would just make all of the harnesses with the longer wire lengths.

** Each fuse in the stock fuse box can have two wires coming from it, but the first wire has to use a special pin that allows the second wire to connect to it. Fuse 24 is also used for the Electrochromic Rear View Mirror. If equipped, and if there is already a wire at Fuse 24 from the rear view mirror it will need to be this special pin that allows the second wire to attach to the row above the first row. If the existing pin is not of this style than you will either need to splice both items into the single fuse, or you can add this wire from the PDC harness into another ignition switched fuse location.