BMW E90 Rear Window Defroster Relay Location Replacement E91 E92 E93 BMW 325i 328i 330i 335i 316d 318d 320d 325d 330d 335d 316i 318i 320i 323i Check out ou Just seemed so obvious it was a thermostat. Bought a new thermostat for $115!! and was a PIA to change, followed the procedure for bleeding the air out. Got in the car yesterday morning and tryed to let it warm up, no heat, but temperature at normal or slightly above. Drove 2 miles, temp shoots up to red, pull over for a few minutes, sudden Assignment of the fuses and relay BMW E90, E91, 92, E93 2005-2011. Fuse and relay location. Fuse box diagram. Cigarette lighter fuse. Additional heater: 7: Not that sounds like it might be failing a diagnostic test. probably have to get out a DVOM and check the resistance of the heater. e30: '87 325i: MAF+WAR chip, long tube STAHL headers, 5MT swap, 4.27 torsen. e60: '08 550i M-sport, 6MT, ARC, Active Steering, 19" wheel delete. R1100S - oilhead FTW. MeNoo;8957148 said: You answered a question for me on 12/31 about a 2006 BMW 325i E90. My heater blower motor quit working and all the years - Answered by a verified BMW Mechanic We use cookies to give you the best possible experience on our website. There is a lead between the battery and the computer with a sensor, and this. lead is telling the computer that the battery is only 30% (it's not, it is actually. 85%), so with this the computer shuts off the heated rear window, and. the screen to save power, when the engine is running it tells the screen. to come on, but it tells the heated Spot on to a degree if the battery is showing exhaustion signs to conserve power for priority items it will shut power down for secondary items like heated mirrors/rear window even if you have the option when unlocking your car day time running lights that too could well be disabled to conserve power. __________________. 65 posts · Joined 2008. #1 · Nov 7, 2008. Got a bit cold in Nashville this evening so I tried out the heated seatswithin 15 to 30 second a terrible burning smell filled the cabin. Both seat heaters were on but a little trial concluded that the driver's seat was to blame I immediately turned it off and after a bit of research online, I Driver visibility is a critically important factor when driving in all conditions. A faulty heater control valve can cause issues with the water flow to the BMW E90 rear window defroster fuse location and replacement E91 E92 E93 BMW 325i 328i 330i 335i 316d 318d 320d 325d 330d 335d 316i 318i 320i 323i 325xi 328xi PUn45.