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///M3 Forum
The BMW E46 ///M3 is the M version E46 and puts out an amazing 333 HP and 262 lb-ft of torque at stock specs! There are an amazing amount of modifications for both the coupe and convertible models so read up and get started modifying your cars today!

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Old 12-10-2009, 01:57 PM   #1
badhbtz
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Oil Temp Gauge Acting Up.. Picture attached. Advice anyone?

The Arrow points to the item I am referencing.. This Oil temp gauge sometimes shows the temp accurately.. and sometimes it looks like this in the picture.. Dead.. Like its not active. Im sure its the sensor but there are a few to contend with. Does anyone know which sensor is linked to this puppy?

Thanks!!!

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Old 12-10-2009, 03:58 PM   #2
badhbtz
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Comeon Fanatics!! 20 People have viewed and nobody cares to help?

Help a brother out now..
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Old 12-10-2009, 04:02 PM   #3
dino71
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I dont end a M3 but I think your temperature sending unit is probably broken. Its usually threaded into the oil pan..maybe? I know there are sending units for oil pressure but I guess they have them for temperature too. I would call the dealership and ask them is a sending unit exists for your car. I hope this helped.
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Old 12-10-2009, 04:07 PM   #4
Custom3
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oil temp sensor?

lucky m3 owners get a oil temp guage there....we get a f*cking useless mpg guage
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Old 12-10-2009, 08:28 PM   #5
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My first question is, you list that your location is Michigan but you have a Euro Tach. This does not seem standard on a US car. Why is this?

If you have a swap I would check to see if you might have a loose connection in the back of the cluster. If that is good I would check your sensor to see if that has gone bad.
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Last edited by api; 12-10-2009 at 08:30 PM.
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Old 12-10-2009, 09:10 PM   #6
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The oil temp sensor is on the RHS of the oil filter. The control module is under the glove box- it's common with the oat display. Was it cold out when you took the picture or is the oat acting up too? If so you may have a problem with the module. F23 and F31 are involved. If it's just oil temp it's most likely the sensor or wiring. Second choice'd be a problem within the cluster.

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Old 12-10-2009, 11:25 PM   #7
mredwin25
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the oil temp sensor is located on the oil pan, not on the filter housing, it is very common for it to fail on the M3. Look at the pic it is item #12, PM me I have a spare one in my spare parts box.
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Old 12-11-2009, 02:08 AM   #8
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yup oil temp sensor, i have the same issue. it's especially annoying because performance and MPG drops too.
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Old 12-11-2009, 08:43 AM   #9
badhbtz
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Quote:
Originally Posted by api View Post
My first question is, you list that your location is Michigan but you have a Euro Tach. This does not seem standard on a US car. Why is this?

If you have a swap I would check to see if you might have a loose connection in the back of the cluster. If that is good I would check your sensor to see if that has gone bad.
I do live in Michigan.. This is a Euro Spec M3 very rare.. It came in thru Canada. Im just looking for some help on how to remedy the sensor
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Old 12-11-2009, 08:45 AM   #10
badhbtz
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Quote:
Originally Posted by mredwin25 View Post
the oil temp sensor is located on the oil pan, not on the filter housing, it is very common for it to fail on the M3. Look at the pic it is item #12, PM me I have a spare one in my spare parts box.
Attachment 341122

Sent you a PM!! thanks guys!
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Old 12-11-2009, 08:49 AM   #11
badhbtz
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Quote:
Originally Posted by johnm View Post
The oil temp sensor is on the RHS of the oil filter. The control module is under the glove box- it's common with the oat display. Was it cold out when you took the picture or is the oat acting up too? If so you may have a problem with the module. F23 and F31 are involved. If it's just oil temp it's most likely the sensor or wiring. Second choice'd be a problem within the cluster.

Cheers
JM
Thanks for the info! i will check all these items!
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Old 12-11-2009, 09:37 AM   #12
mredwin25
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pm's replied
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Old 12-12-2009, 08:37 AM   #13
johnm
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Quote:
Originally Posted by mredwin25 View Post
the oil temp sensor is located on the oil pan, not on the filter housing, it is very common for it to fail on the M3. Look at the pic it is item #12, PM me I have a spare one in my spare parts box.
Attachment 341122
You sure that's not the level sensor (thermal level sensor to be precise)? ETM shows the level sensor in the sump and the temp sensor in the filter block.

Cheers
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Old 05-06-2010, 03:23 PM   #14
///M3PO
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Hey guys,

Relatively new M3 owner here, but I am encountering the same problem. I searced the forum for a little more info but this was about the most useful thread I could find.

I ordered a new oil leveling sensor from Autohaus and just had the oil changed and new sensor installed earlier today and the guage still does not inidicate the temp(plus i get the yellow light staying on ~10 seconds after ignition) after a spirited drive back from the shop. I'm gonna go ahead and assue the shop tech knew what he was doing and installed it properly. Any idea what my next step could be?
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Old 06-08-2010, 04:36 AM   #15
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Im having the same problem so maybe we could work together.
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Old 06-08-2010, 09:26 AM   #16
M Shark
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I might have this problem in the future so I'm bookmarking this page. LOL!
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Old 06-08-2010, 09:43 AM   #17
sick.boy1986
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Quote:
Originally Posted by ///M3PO View Post
Any idea what my next step could be?
Try searching m3forum.net, if you don't find anything, post there.
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Old 06-08-2010, 05:47 PM   #18
wtm1417
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Yeah as mentioned above this is a common issue for e46 m3's. I had to change mine several months ago and it wasn't too hard. Next time you need to change your oil just drop the plastic skid plate in front, and then the metal skid plate behind it. Then you will see the oil leveling sensor held in by 1 torx bolt i think. Just swap it out after you drain the oil. Took less the 45 min. I think if you search oil leveling sensor you will find more info.
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Old 06-10-2010, 12:35 PM   #19
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do the codes have to be cleared after installing the new oil temp sensor?
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Old 06-10-2010, 10:06 PM   #20
azndrunk74
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^^^ nope
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