E61 2004 525d Replacement key question

Discussion in '5 Series' started by Richyroos, Mar 9, 2019.

  1. Richyroos
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    Richyroos

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    I know this will have been covered before, but I cant recall the answer 100% !! I am looking at a car which has a dud remote key, at the moment I am assuming it will be a flat/failed key battery, which I have had on other BM's in the past, and replaced the battery.

    However if it is some other problem with the remote, that needs a new key from the stealer - ie around £140, if that is necessary does the key need to be coded by the dealer to the car or is it just a simple matter of getting the car and key to recognise each other myself?

    Thanks guys
     
  2. slim_boy_fat
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    slim_boy_fat WARLORD Site Supporter

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    I might be wrong [been known...:oops:] but afaik it needs to be coded to the car.
     
  3. Adie
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    Adie WARLORD Site Supporter

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    Pretty sure it will need to be coded
     
  4. Bluebottle
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    Bluebottle

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    The later LCI E39 has a sealed key, a replacement key has to be ordered new by dealer with proof of ID so I presume the E60 is similar.
     
  5. markyboyt
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    markyboyt

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    The new key will work straight away as long as it hasn’t been disabled by somebody using diagnosis. It just has to be put into the ignition to activate it before it will central lock.
    It will only have a replaceable battery if it is a comfort access key. The sealed keys charge whilst in the ignition with ignition on so worth a try but if it is the key that is usually used with the car then it’s obviously had plenty of chance to charge already.
     
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    Last edited: Mar 10, 2019
  6. Richyroos
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    Richyroos

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    Thank you guys for all your comments - I am a little confused though.....!! It sounds like a new key ordered from a dealer may well work straight away - as indeed I would hope it would at £140 a pop! What concerned me was having to pay a further, no doubt expensive fee, to code it to the car having bought the new key. In Markyboyt's reply, I didn't realise that there was a different type of key that was a sealed type, I thought they all had a battery that the car ignition charged - unless you mean the type where you have to unsolder the battery from the circuit board, and solder a new battery onto it. The only keys I have come across that actually had coin cell batteries in them - were the older E39 keys with the rubber push buttons..

    If I end up buying the car I will soon find out what is required I suppose!! Thank you all anyway!

    Rich
     
  7. markyboyt
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    markyboyt

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    Comfort access keys have a replaceable battery in them with an advised 2 year service life because they give you keyless ignition so have no way to charge up. The sealed type have a non replaceable rechargeable battery that is charged by the ignition.

    It's now occurred to me that the age of the car you asked about is early pre 09/2005 so is on a normal blade type key rather than the later style slot in like the 1/3 series used so that will be a normal key and I think the old style button sequence to code to central locking.
     
  8. Richyroos
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    Richyroos

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    Thanks for that markyboyt - it is indeed a normal blade type key, so presumably the new key will need aligning to the car with the button pressing sequence.
     

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