68. Plug-extra wire to heater wire 69. Plug-heater wire to fuel pump wire 70. Connection for heater 71. Ballast resistor in heater 72. Thermoswitch (parked car heater) 73. Heater motor 74. Overheating switch (parked car heater) 75. Heater plug for parked car heater 76. Heater 77. Fuel pump 78. Plug - on-board computer to remote control 79. BMW E90 Crankcase Breather Valve Replacement. Jump to Photos. 154 Comments. Project Time: 4 hours. Tab: $300. Talent. Tools: Set of sockets ( hex and Torx T25), wrenches, screwdrivers, Parts Required: Crankcase breather valve, crankcase breather hoses and pipes. Performance Gain: Car will run well. The heater may stop working in BMW 1 Series due to low coolant level or air in the cooling system, clogged heater core, bad thermostat, faulty blend door actuator, bad water pump, dirty cabin air filter, bad blower motor, or HVAC control unit malfunction. 1. Low coolant or air in the cooling system. Low coolant level or air in the cooling Cold air (not warm) coming through the vents when the heater is on. Coolant leakage visible inside the cabin or a damp smell. Can a blown fuse cause heater not to work? Yes modern cars have switch that controls the water flow to the vents inside the car. Blown fuse will prevent it from opening and will cause a car heater not to work. Today whilst driving without the A/C on, or the auto on, just manual settings, I seemed to have a problem with the heater/ ventilation. Just using manual control, I had no warmth in the air unless I turned it up to nearly 26 degrees. Anything below this caused condensation on the outside of the windscreen as we travelled along. I scanned for codes using Bimmer Tool and got the following codes: 9c48, 9c49, 9c4c, 9c4e, 9c50, 9c52 You have EIGHT (8) Flap Motors. The LAST 6 motors in the Series LIN BUS chain (green wires) are NOT functioning, the Defrost. and Recirculation Flap Motors ARE working presumably (NO fault Codes). Taillights are LED and light pipes. Brake force display lights only when braking in excess of. Brake Force Display. The brake force display is fitted on standard on the E70. The following conditions must be met for operation of the brake force display: • Driving speed > 5 km/h. • Brake deceleration above 5 m/s^2. I just replaced my coolant pump and thermostat in my E92 BMW 320 N43 engine.It is a 4 cylinder variant.The procedure is the same as the written guide but most of the work can be done from the engine bay as 4cyl variants engine block is shorter.Only the two E12 bolt of the pump had to be unscrew from the bottom of the car. tzuZ.