Replacing coolant level sensor

Genes1s · 10-27-2020, 12:48 AM

Do you need to disconnect the batter when replacing this sensor or any other sensor for that matter?

I’ve never disconnected the battery to do any sensor replacement in older BMW, but perhaps this newer car is more sensitive to it?

Thanks

dtla1 · 10-27-2020, 12:26 PM

For coolant level sensor, I would say no need to disconnect battery, not sure if there is an official procedure for it though. No need to even drain coolant, or remove reservoir for that matter. If you have enough space in there (pending your hand size and if you have a catch can or something else in the way) you can leave everything connected and reach below the reservoir to unlatch electrical connection, twist and remove the sensor.

10-27-2020, 12:48 AM	#1
Genes1s Private 32 Rep 53 Posts Drives: 1997 E36 M3/4/5. 2011 E82 135i Join Date: Feb 2020 Location: Vancouver, WA iTrader: (0)	Replacing coolant level sensor Do you need to disconnect the batter when replacing this sensor or any other sensor for that matter? I’ve never disconnected the battery to do any sensor replacement in older BMW, but perhaps this newer car is more sensitive to it? Thanks __________________ 1997 Artic Silver E36 M3/4/5 2000 Sunlit Sand Nissan Maxima 5 SP 2011 Space Gray E82 N55 DCT.
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10-27-2020, 12:26 PM	#2
dtla1 Colonel 828 Rep 2,232 Posts Drives: 2011 135i, Space Grey Join Date: Apr 2014 Location: Silicon Valley iTrader: (2)	For coolant level sensor, I would say no need to disconnect battery, not sure if there is an official procedure for it though. No need to even drain coolant, or remove reservoir for that matter. If you have enough space in there (pending your hand size and if you have a catch can or something else in the way) you can leave everything connected and reach below the reservoir to unlatch electrical connection, twist and remove the sensor.
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