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E90/E91/E92/E93 (2006 - 2013)
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  #1  
Old 12-18-2012, 08:33 PM
sexishorti sexishorti is offline
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Location: Philadelphia,pa
 
Join Date: Dec 2012
Posts: 3
Mein Auto: BMW325xi
Crank shaft sensor?transmission:(

New to the forum and was wondering if anyone had experienced a melting shaft sensor? I have a 325xi (06). I don't even know what this is but my mechanic said it was melted? Felt like my transmission was going & car shop said it was a bunch of things wrong w it. Pretty much saying they would need to remove part of the engine to get to the part & replace some engine parts. I'm really good w keeping up w maintenance & every time any kind of light comes on i take it to a mechanic bc the last thing i want is to brake down in the middle of no where. I feel like I'm getting the run around bc of being a girl. Does any of this sound right. In desperate need of help or a new car if I need to spend a lot to get it fixed
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  #2  
Old 12-19-2012, 12:35 AM
the kidd's Avatar
the kidd the kidd is offline
pay it forward
Location: boston
 
Join Date: Jun 2010
Posts: 762
Mein Auto: X5 and Subaru Impreza
I have a 2011 E90 that had a rear main seal of crankshaft go bad. Long story short, it was replaced. After replacement, crankshaft sensor needed to be replaced. I think it was damaged from the initial repair. I had a loaner for about two weeks when this occured. This was all done under warranty, as you can see that i'm still covered.
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  #3  
Old 12-19-2012, 03:22 AM
hondo402000 hondo402000 is offline
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Location: Charlotte, NC
 
Join Date: Nov 2012
Posts: 1,583
Mein Auto: 2007-335 HTC
get another opinion if possible
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  #4  
Old 12-19-2012, 10:36 PM
sptt144 sptt144 is offline
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Location: Orange County, Ca.
 
Join Date: Aug 2012
Posts: 919
Mein Auto: 2009 335i
Usually there are two sensors in a car on the engine like you are describing, a Crank Shaft Position Sensor (CPS) and a Camshaft Sensor. These sensors are basically magnets that stick into a hole in the engine casing and have a wire attached to them that go to the computer. It lets the car know where the engine is in the piston cycle while the camshaft and the crankshaft turns to ensure nothing is out of turn or timing sequence. It's an electronic measurment of an object that is spinning and once every rotation the sensor sends a signal to the computer. The sensors shouldn't "melt" unless something very hot contacted the plastic casing and melted the wire or the casing cracked and oil or something is shorting it out, but they do go bad eventually. The sensors are typically not expensive (30-70 bucks) and fairly easy to replace (depending on how hard it is to get to them). I've never had to tear an engine apart to replace one. Most folks don't know what they look like or where they are located. Act like you know what you are talking about and call another shop and ask them how much it would be to replace your sensor on your model car. Typical problems are check engine lights come on, starting is hard, start/stop issues happen with the engine. This is what I found regarding your car and replacing the CPS. Doesn't seem major at all:

"I've had to do this one before. I dont have any pics but the way I did it was jack up the car and from underneath you have to reach up above the crank and try to change it blind. Only hard part was trying to get the screw back in blind. You always will want to wear long sleeves and have a cool engine btw.

Here is the part ($26.23):

http://www.******************.com/de...EPB311803.html

Here's another thread discussing the CPS issues:

http://www.e90post.com/forums/showthread.php?t=642822

Last edited by sptt144; 12-19-2012 at 11:04 PM.
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  #5  
Old 12-20-2012, 06:16 AM
CALWATERBOY's Avatar
CALWATERBOY CALWATERBOY is offline
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Location: San Francisco
 
Join Date: Aug 2009
Posts: 10,007
Mein Auto: 2009 E93 N54
Quote:
Originally Posted by sexishorti View Post
New to the forum and was wondering if anyone had experienced a melting shaft sensor? I have a 325xi (06). I don't even know what this is but my mechanic said it was melted? Felt like my transmission was going & car shop said it was a bunch of things wrong w it. Pretty much saying they would need to remove part of the engine to get to the part & replace some engine parts. I'm really good w keeping up w maintenance & every time any kind of light comes on i take it to a mechanic bc the last thing i want is to brake down in the middle of no where. I feel like I'm getting the run around bc of being a girl. Does any of this sound right. In desperate need of help or a new car if I need to spend a lot to get it fixed

Indeed!

I'm certain there will be interest in this - please, post a picture.

Also post an image o'your mechanic's dianosis, issues + work to be done.
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