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E46 (1999 - 2006)
The fourth generation 3 Series (E46 chassis) was introduced in 1999 and set the standard for engineering and performance during it's years of production including being named to Car & Driver's 10 best list every one of those years! ! -- View the E46 Wiki

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  #1  
Old 10-13-2012, 10:12 AM
jjflash jjflash is offline
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Location: Pickerington, Ohio
 
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Mein Auto: E46
Coolant Level Sensor

Does anyone know if there is suppose to be an O-Ring for the coolant level sensor (attached to the expansion tank) for an E-46 Series 3? Seems like it's just plastic on plastic as far as a seal goes.
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Old 10-13-2012, 06:19 PM
Jimmys 530i Jimmys 530i is offline
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Mein Auto: 2003 530i
No. It does not actually contact the coolant.
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Old 10-13-2012, 09:36 PM
GoForthFast GoForthFast is offline
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+1
If you look into the bottom of the ET, you'll see a solid annular well. No opening to coolant.
Sensor is magnetic.
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