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E39 (1997 - 2003)
The BMW 5-Series (E39 chassis) was introduced in the United States as a 1997 model year car and lasted until the 2004 when the E60 chassis was released. The United States saw several variations including the 525i, 528i, 530i and 540i. -- View the E39 Wiki

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  #1  
Old 07-03-2012, 10:29 AM
bitsnibblebytes bitsnibblebytes is offline
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Outside Temperature Sensor - Where is it ?

I have 2001 E39 525i. The temperature as shown on the dash/miles indicator is always wrong. When it is 85F outside it shows -10F. It affect the way the auto AC works. Where is this sensor located and is this something I can replace? Please suggest me any online shop I can order it from. Thanks.
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  #2  
Old 07-03-2012, 10:39 AM
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Albo Albo is online now
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Passenger side front wheel well just aft of the bumper. The liner contains a molded bracket that holds the sensor....this often breaks with time, heat or impact.

Liner:



Use this DIY:

http://haferman.org/bmw/
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  #3  
Old 07-03-2012, 11:10 AM
bitsnibblebytes bitsnibblebytes is offline
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Thanks. The link is quite descriptive. I will give it a try. Any recommendation where to buy the sensor and parts?
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  #4  
Old 07-03-2012, 11:19 AM
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tmvE39/E53/Z32 tmvE39/E53/Z32 is offline
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go here for part number http://www.realoem.com/bmw/
then go here to shop http://furiousmethod.com/
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Last edited by tmvE39/E53/Z32; 07-03-2012 at 11:20 AM.
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  #5  
Old 07-03-2012, 11:32 AM
Krafty530 Krafty530 is offline
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Easy to replace on the car. They sell on eBay for around $16 and are easy to install. They are shaped like a long cone. This will enable the max air to work as well.
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  #6  
Old 07-03-2012, 03:03 PM
L0F L0F is offline
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The wiring for the sensor also is prone to damage, and many times the actual sensor is still good just the wiring that ****s up.
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  #7  
Old 07-03-2012, 08:53 PM
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seemyad seemyad is offline
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Quote:
Originally Posted by L0F View Post
The wiring for the sensor also is prone to damage, and many times the actual sensor is still good just the wiring that ****s up.
+1

Do a visual inspection for corrosion in the connector.

If you have a meter check your wires to chassis ground. Do DC voltage to ground first. If that reads zero then check ohms to ground.

I imagine the sensor is a thermistor of some sort.

Last edited by seemyad; 07-04-2012 at 03:09 AM.
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  #8  
Old 07-04-2012, 01:46 AM
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bluebee bluebee is offline
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Go to the bestlinks and thread search for "ambient" & you'll find, among others:
- Ambient temperature sensor breaking

To re-locate, see cn90's DIY:
AMBIENT TEMP SENSOR HIDING PLACE:
http://forums.bimmerforums.com/forum....php?t=1418124
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Your job, in return, is to read the suggested threads, where the best people will always add value to those threads, either by pictures or by descriptions, so the next person with the same problem stands on your shoulders.
See also: E39 Bestlinks & How to easily find what you need
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