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Hi, having lost my e46 330d I've looked around and got a 525i e39.

I got it second hand yesterday, drives very well, full bmw service history + specialist last visit. Its a beautiful ride but I'm currently worried for two reasons.

1. Its an automatic and when I turn off the ignition and lock the car, (with it in P (park) and handbreak on) the orange 'P' light next to the gear leaver stays on. IS THIS NORMAL? I don't think it should still be on.

2. What is this cable and why isn't it plugged into anything? This worries me a f***ing load. I hope these attached pictures work.
The cable is on the left side of the engine bay, just along the corner, below the cabin air filter housing. plugged into nowhere.


thanks for any help!
 

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My light also stays on when the car is left in park (528 Sport) so we either both have a fault, or they are meant to stay on.

I would assume that your plug, which isnt connected to anything is simply part of a standard loom, that doesnt do anything on your car. Fairly common on these cars, with all the optional extras that were available.

Perhaps someone who is more knowledgeable than me when it comes to E39 electrics will be along shortly to shed some more light.

Thanks
Barry
 

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On these cars the system stays live for about 15 mins after you have turned them off.

As for the plug, as above don't worry it's probably a spare.
 

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The orange P light stays on it then eventually does go off - this is normal - as soon as you open the car it comes back on again - next time you leave the car overnight have a look inside before opening the car you will notice that the light is off. As soon as you press unlock the light will come on.
 

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:rofl least to wory about is a led light stayng on for 15 min ,
but yah,before you unlock your car just look true wondow that light near P is off :)
and that free plug is must be for a supercharger :eye-popping
 

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OK the plug should fit onto the bonnet closed/open switch which is situated on the engine side of the air conditioning filter housing high up so the bonnet can depress the switch when closed.
As its disconnected either the switch is missing or is faulty causing the alarm to go off I suspect.:thumbsup

You have been advised correctly that the light by the shift stick takes about 15 minutes to go out, this is when the system goes into sleep mode.
 

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i'd guess at the bonnet pin switch for the plug, and the light will go off when the car 'goes to sleep' - it shouldn't be on before you unlock the car tomorrow morning
 

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i'd guess at the bonnet pin switch for the plug, and the light will go off when the car 'goes to sleep' - it shouldn't be on before you unlock the car tomorrow morning
Should be off in the morning before you unlock
The bonnet switch is a plunger (pin) type:thumbsup

Found this gem
Alarm system Body Control Module (BCM) can revert to "Shipping mode" and not respond to the remote. A good specialist can recode it. But some BMW dealers want £230 plus VAT plus fitting for a replacement module.

Another reason for alarms sounding is failure of the bonnet sensor. This is a poor piece of engineering with exposed contacts. Temperature changes, such as night time cooling and hot sun, cause the bonnet to flex, which sets the alarm off. Replacements cost £8.50 and are easy to fit.
 
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