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Old 10-06-2012, 09:33 AM
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QSilver7 QSilver7 is offline
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Location: Northeast Indiana
Join Date: Aug 2008
Posts: 9,170
Mein Auto: 1997 740iL / 2006 X5 4.4
Originally Posted by hqstu View Post
...what is it about the hood sensor?
Can it be repaired? Is it shorting out (i.e. going open position when closed)?
It's so inexpensive, it is probably easier to replace...or like many owners...the threat of someone tampering with the hood is so minuscule, they just UNPLUG the electrical connector from the hood sensor:
  1. Note how much dirt/grime/dust collects on the hood sensor switch...this could cause the pin to stick or not fully retract or expand.
  2. Take note of where the sensor is located...if the micro-filter housing has been opened/closed to replace a may not be aligned properly or the plastic clip that secures the sensor to the housing may have cracked slightly.
  3. You may also want to notice where the "tip" of the pin contacts the hood. You may think that it contacts the metal section of the hood...when in fact, it may be pressing into the insulation on the hood...if it is...check to see if that area is worn away...or has been pushed up by the pin and no longer compressing the tip of the pin down far enough.

If you have some type of powder, chalk paint or fingernail can slather the top of the senor's pin, then close the hood...this will mark where the tip of the pin contacts the hood. If this contact point is the insulation versus the metal part of the hood...worn insulation may be the cause of the sensor not making proper contact.

Q {BMW CCA Member #191509}
2006 E53 X5 4.4i (Sterling Gray) 12/05 mfg date <<~>> 97 740iL (Arctic Silver) 3/97 mfg date
99 540iT (Orient Blue) <<~>> 95 525IT (Alpine White)
91 735iL (Schwarz Black) <<~>> 85 325e (Bronzit)

Last edited by QSilver7; 10-06-2012 at 09:38 AM.
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