Remove the brown relay by firmly grabbing and pull straight up. Take care not to break anything. On the light orange relay, release the two side clips on the relay itself, and remove. Then reinstall, replace corner and filter housing. Then reconnect the battery. The wipers should start working again as mine did. Interestingly some provision for the auxiliary heater is already fitted. The picture above shows the fuel pump lid on top of the fuel tank. The smaller pipe is the auxiliary heater fuel feed. The pipe finishes at a moulded nipple under the rear passenger (if RHD) access panel near the wheel arch. The fuel pump for the Webasto is mounted in this BMW 3 Series (E90, E91, E92, E93) (2005 - 2010) Fuse Box Diagram. In this article you will find a description of fuses and relays BMW, with photos of block diagrams and their locations. Highlighted the cigarette lighter fuse (as the most popular thing people look for). Get tips on blown fuses, replacing a fuse, and more. First, start by checking the level of coolant in the reservoir tank under the hood. If it is below the recommended level, you may leak or need to add more coolant. Next, inspect the hoses and connections for any visible leaks or damage. Additionally, make sure that all vents and openings in the heating system are clear of debris or obstructions. Have the car scanned with a BMW-specific scan tool. The waterpump codes are manufacturer-specific codes and can't be read by a normal OBD II scan tool. The waterpump is electrically driven, so as any electric motor will, it can stop rotating for a period, cool down and start working again. It's not good to keep letting the engine overheat. ***8220;If your car***8217;s [insert option name here] does not work, check your VIN on the BMW decoder to see if [option code] is actually included in the build.***8221; Alignment here: The Definitive Alignment Thread After the trip to the dealer, where it was discovered the CBS Oil Service system is designed to stop working after 300,000 kilometers (186,000 miles), BMW has not yet fixed the issue. I waited 4 months to post this because I wanted to give BMW a chance to fix it and post the whole issue including BMWs resolution of it (just to be fair). I have a 2007 BMW 335i, and everything works amazingly except the heat. The AC blows cold on even the hottest days, but I cannot get the heat to blow from the vents. I have tried everything. I drove back from Orlando, FL last night up to north Florida, and the outside temperature dropped to about 32 degrees. I had the internal temperature set 1.8K 216K views 4 years ago Tools that help get the job done : M18 Impact and Drill Set 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 khOQm.