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



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      11-06-2010, 12:48 AM   #1
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trasnmission fluid level sensor?

I read somewhere that E90's throw a warning on the dash when the transmission oil is low. I know they have an oil level sensor, but wasn't sure they had a tranny fluid level sensor as well. Anyone know the answer to this?
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      11-06-2010, 01:17 AM   #2
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      11-06-2010, 08:25 AM   #3
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I changed my auto transmission oil 2x and I don't remember seeing any lights showing low-level. Bmw believes that since it is a closed system it doesn't need a dipstick. However, they recommend changing it at 100,000 miles (even though the sticker on the pan states "lifetime"). They also overlooked something, they are assuming your transmission lines/pan/seals will never leak. If and when they do, that will ruin your transmission and you won't know it until it is too late. The art of engineering.
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If no codes are being thrown use Chevron Techron fuel injector cleaner (concentrate). It solves rpm fluctuating upon cold start-up. Also, for most BMW problems start off by scanning your car with the Peake Research Tool. It contains the actual BMW codes. If you want to register a newly installed battery for free (just buy a $10 cable) and google/download BMWLogger
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      11-06-2010, 08:40 AM   #4
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Also, the manual shows that there is a transmission light when it over heats.
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If no codes are being thrown use Chevron Techron fuel injector cleaner (concentrate). It solves rpm fluctuating upon cold start-up. Also, for most BMW problems start off by scanning your car with the Peake Research Tool. It contains the actual BMW codes. If you want to register a newly installed battery for free (just buy a $10 cable) and google/download BMWLogger
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      11-06-2010, 05:34 PM   #5
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Quote:
Originally Posted by Chriztofor View Post
I changed my auto transmission oil 2x and I don't remember seeing any lights showing low-level....
Was your tranny oil low when you changed your oil?
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      11-06-2010, 06:42 PM   #6
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Quote:
Originally Posted by nottibimmer View Post
Was your tranny oil low when you changed your oil?
No, but at one time it was low during the process of changing it.
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If no codes are being thrown use Chevron Techron fuel injector cleaner (concentrate). It solves rpm fluctuating upon cold start-up. Also, for most BMW problems start off by scanning your car with the Peake Research Tool. It contains the actual BMW codes. If you want to register a newly installed battery for free (just buy a $10 cable) and google/download BMWLogger
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      11-06-2010, 10:02 PM   #7
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Can anyone confirm if E90's do or do not have a sensor that alerts you when the tranny fluid is too low?
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      11-10-2010, 05:30 PM   #8
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still wanting to confirm this is a no?
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      11-10-2010, 05:39 PM   #9
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After thinking about it, I can confirm that there is no low light indicator. Here is my DIY, http://www.e90post.com/forums/showthread.php?t=367729 the oil was low at one point during the oil change process (while I was sitting in the car and shifting through the gears) and no oil light came on. See Steps 9-11.
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      11-10-2010, 07:09 PM   #10
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no sensor and no light.
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