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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 04-28-2012, 05:16 PM
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delirium330 delirium330 is offline
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in the middle of DIY, help on coolant level sensor!

quick question, the blue one in the picture is the new one, is it really all plastic? want to make sure before i stick it back in...

im doing cooling system, OFHG, and CVV right now..... argggg it is not easy just go the ICV out, TB next, then CVV and hoses...
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  #2  
Old 04-28-2012, 05:34 PM
Starless Starless is offline
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Dang, that's something new...where did u buy it?
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  #3  
Old 04-28-2012, 05:41 PM
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delirium330 delirium330 is offline
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Quote:
Originally Posted by Starless View Post
Dang, that's something new...where did u buy it?
autohaus.az i think.....

Genuine BMW
Coolant Level Sensor; Replacement Type
Located inverted at bottom of coolant expansion tank, headlight cleaning reservoir, and windshield washer fluid reservoir if so equipped. Up to 3 per car. This sensor will be replacement type, 17137553919, as superceded by BMW. Current version is blue and no longer has the hose sheathing.



http://www.autohausaz.com/search/pro...Level%20Sensor
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  #4  
Old 04-28-2012, 06:29 PM
KenG KenG is offline
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I would check other sites like ecs tuning and double check if that is how it looks like,
Sorry not much help, first time seeing a blue one like that

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  #5  
Old 04-28-2012, 06:32 PM
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delirium330 delirium330 is offline
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i checked bavauto and it is the old looking one, i checked ecs and it shows the one with the sheath that autohauz bmw oem one says is the old one. anybody used this one before?
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  #6  
Old 04-28-2012, 08:53 PM
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johnnygraphic johnnygraphic is offline
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When I did mine a few years back, mine was blue too. I remember thinking that it looked different from the original white one too. Installed and no issues since. Been about 25k miles and 2 years.

I wouldn't worry too much about it. The blue plastic is probably a more robust design.

Johnny
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  #7  
Old 04-28-2012, 09:31 PM
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delirium330 delirium330 is offline
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thanks guys, on the home stretch, got done with cvv, putting alternator and OFHG back on, will be on the coolant level sensor soon. thanks starless for the cvv guide. i will curse the 1/4 turn hose for history, wasnt too bad with the OFHG out tho.
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  #8  
Old 03-08-2013, 09:56 PM
mikeywilz mikeywilz is offline
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Do have to take the plastic sheathing off of the old one and use it the new? It might be self explanatory once I get the old one out but I would like to know before I start on mine. Thanks in advance.
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  #9  
Old 03-08-2013, 10:54 PM
GoForthFast GoForthFast is offline
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Some have a protective tube on the sensing area that should slide off easily before installation. It will be obvious when you get the part.
This blue plastic one pictured should be installed just like it is.
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  #10  
Old 03-08-2013, 11:10 PM
mikeywilz mikeywilz is offline
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Thanks for the quick response. The blue plastic one does NOT have a protective sheath. Does the new sensor not require a protective sheath anymore? Or should I reuse the one from the old sensor. Thanks
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  #11  
Old 03-09-2013, 11:24 PM
GoForthFast GoForthFast is offline
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Instructions: go back and read post #9 more carefully. It completely answers your post #10 question.

Don't let me down.
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  #12  
Old 03-09-2013, 11:46 PM
mikeywilz mikeywilz is offline
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Yep. Got it thanks.
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  #13  
Old 03-10-2013, 03:47 PM
GoForthFast GoForthFast is offline
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Good Luck!
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  #14  
Old 03-10-2013, 10:10 PM
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delirium330 delirium330 is offline
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yep, to confirm for everyone, the new blue plastic ones are virtually all plastic, but the metal sensing wire is slightly exposed from the plastic in one area where the coolant can touch it.
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  #15  
Old 03-12-2013, 04:47 AM
TitanSilverE46 TitanSilverE46 is offline
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Quote:
Originally Posted by delirium330 View Post
yep, to confirm for everyone, the new blue plastic ones are virtually all plastic, but the metal sensing wire is slightly exposed from the plastic in one area where the coolant can touch it.
Actually the coolant does not touch it. The sensor is in a blind pocket and can be removed at any time without loosing a drop of coolant.

It operates by magnetic field with the float that is in the coolant and contains a magnet. The reed switch in the sensor responds to the magnetic field.
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  #16  
Old 03-21-2013, 02:55 AM
J.Tabash J.Tabash is offline
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its not all plastic its just wrapped with plastic under the plastic there are some metal
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  #17  
Old 03-21-2013, 08:38 AM
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bluebee bluebee is offline
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Quote:
Originally Posted by delirium330 View Post
the metal sensing wire is slightly exposed from the plastic in one area where the coolant can touch it.
They are Reed switches. No need for coolant to touch anything.

Here's my expansion tank on my M54 with the Reed switch in perspective with the magnet on the white float (we never did figure out what the black float does in the 2nd chamber):
- Behr radiator and Behr expansion (aka surge) tank autopsy (1) (2) & request for another autopsy (1)

Note the steel clip used by me to test whether the black "coin" was a magnet (it is):
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  #18  
Old 03-21-2013, 09:07 AM
mikeywilz mikeywilz is offline
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Thanks everyone for all of the replies. I did the job last week and the sensor was probably the easiest part of the job. A half twist and it pulls right out. The new one pops right in. The plastic sheath is glued on there pretty good and won't come off. I was most concerned with nt having a sheath. The updated part has eliminated the need for the sheath and its a super easy swap out DIY.
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  #19  
Old 03-21-2013, 09:31 AM
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whinojosa whinojosa is offline
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Has anyone with the updated (all blue) part received a level low indication?

I've had this part in since 2010.. I checked my coolant level recently and it was extremely low... The float was bottomed out. I never received a coolant level low indicator.
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