Independent heating circuit for BMW 3 series E90/E91/E92/E93 facelift (2008-2013)

AUXILIARY HEATER COOLANT PUMP AUXILIARY HEATER SWITCH OVER VALVE BLK WIRE BRN WIRE BRN/RED WIRE ELECTRONICS JUNCTION BOX FUSE 23 HEATER HEATING/AIR CONDITIONING SYSTEM (CENTER OF DASH, ABOVE RADIO) INDEPENDENT AUXILIARY HEATER CONTROL MODULE (LEFT SIDE OF FRONT BUMPER) METERING PUMP (UNDER VEHICLE) NCA WIRE RED/GRN WIRE RED/GRY WIRE RELAY ENERGIZED JUNCTION BOX (UNDER RIGHT SIDE OF DASH) WHT/BLU WIRE YEL/BRN WIRE