This is the complete, uncut, driver’s heated seat wiring removed from a LHD E46 chassis harness that was being thinned for a racecar. This wiring can easily be added to another E46 to retrofit a stock heated seat.

This wiring goes from the X275, 25-pin, Yellow connector of the Driver’s Seat Connector to the X1869, 23-pin, Black/Brown connector of the A169 – Switch Center and to the X173, Comb Splice, Chassis Ground Point – Driver’s Rocker Panel.

Wiring Details:

1.50mm² Green/Violet – X275-25 to X1869-13
0.35mm² White/Green – X275-23 to X1869-21
1.50mm² Brown – X275-24 to X173

Notes:

– On a stock chassis harness this wiring is routed along the rocker panel and behind the dash, but when retrofitting this into a street car with a full interior it is a lot easier to route this wiring under the center console / armrest.

– You do not have to attach this ground wire back to the X173, Comb Splice. You can cut the pin for the comb splice off and use a ring terminal to attach this ground wire to another suitable ground location.