6449 posts 路 Joined 2017. #7 路 Feb 10, 2018. BMW tis says: Knocking noises when residual heat is active. On vehicles from E-series E53, E60, E61, E63, E64, E65, E66, E67, E70 and E83, a slight tapping noise may be heard when the residual heat function is active. This is caused by the control mechanism for the hot water feed (water valve) to
Originally Posted by svinfinity. Check the battery cables in the trunk. It may be a loose wire on the positive cable on the side facing towards the front of the car. Yes OP, this is a possibility. Access to the battery is fairly easy. To your question yes, It can be coded out if it's the seat mat sensor but you have to disconnect the sensor There is an install kit available for LHD vehicles, BMW p/n 64502359944. However, I don鈥檛 know if that comes with the actual webasto heater though, or if I would need to get that separately. Unfortunately there is no BMW part listed to retrofit independent heating to a RHD car. NOTE 2: On Windows & Linux, the "F3" hotkey will jump to the next find; "shift F3" will reverse the find; "enter" will open the current link. Searching for "heater core" came up red; but searching for "heater": - Heater Valve replace (Hot air only) DIY. - Heater control valve replacement. - Heater hot water valve repair. YgaB.