BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Mechanical Maintenance: Break-in / Oil & Fluids / Servicing / Warranty > Question about coolant level sensor

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      11-30-2021, 12:49 PM   #1
WRichieX's Avatar

Drives: 07 335i e93 6MT
Join Date: May 2013
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Question about coolant level sensor

Hey guys, so I replaced my water pump and there was a crack in the seams of the expansion tank so replaced that as well. Did bleed procedure plenty of times. However, now my coolant low warning is always on. I was researching and could be a faulty tank but sensor as well. After researching, I noticed my sensor is not the blue bmw one. I have seen videos with the same color as mine but wondering if this is an aftermarket. Why are there different types of sensors on these bmws. To my knowledge, all original regarding the tank.

UPDATE: So I reinstalled my old tank and reinstalled my sensor. The Sensor is working fine so my new tank is defective I guess.
Attached Images

07 BMW 335i E93 6MT (Praying neighborhood doesn't get flooded...again)
04 Infiniti G35 Coupe 6MT (Flooded)
08 Audi TT 2.0T DSG (Flooded)
03 Subaru WRX 5MT (Flooded)

Last edited by WRichieX; 11-30-2021 at 01:01 PM..
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