Immobiliser - MINI Cooper Forum

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post #1 of 4 (permalink) Old Feb 1st, 2014, 10:13 AM Thread Starter
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Immobiliser

Sorry if this in the in the place. I wasn't sure where to put it.

Part of the plastic on my key fell off awhile back but i was still able to remote open the car door. Yesterday it failed to open remotely for the first time so i manually had to open the car door but to my surprise the engine wouldn't start.

I now know this is due to the immobiliser. I didn't even know i had one or what it was before yesterday. I've had to leave my car at work and was planning to get it over the weekend as i have a spare key at home.

Will this spare key work or has me trying to start it with the broken key permanently locked it and i'll need a locksmith or someone to sort it out? I assume this isn't the case but wanted to double check.
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post #2 of 4 (permalink) Old Feb 1st, 2014, 04:12 PM
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If the spare key is a remote key with good battery it should be fine.
All cars have had to have engine imobilisors fitted for some years now in the UK.

When your other key broke did the immobilizer part fall out?
What year is your Mini?

See photos here:
"Here is the key with the circuit board removed. You can see the immobilizer in the back cover; here is how to gently pry it out. It's a sealed unit and you probably won't hurt it but be gentle anyway. Put it in a safe place as well- you DO NOT want to lose this."
http://www.mini2.com/forum/first-gen...air-guide.html
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post #3 of 4 (permalink) Old Feb 1st, 2014, 05:27 PM Thread Starter
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Thanks for the reply.

No the immobilizer part didn't fall out. It was only part of the plastic that covered the circuit board underneath. The first picture in the link you posted shows the key missing two parts of plastic. My key is missing the section on the left of this picture. It covers the button which remotely opens the car door.

I just assumed the circuit board had become faulty due to it being exposed. Could it be that i need to replace the battery within the key to get it working again?

The mini is year 2004.
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post #4 of 4 (permalink) Old Feb 2nd, 2014, 11:05 AM
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If the circuit board is exposed the tiny microswitches below the outer buttons often fail soon afterwards.
If you want to avoid buying a new remote key from BMW (approx. £150 with proof of ownership) you could try here:
2001-2004 MINI Clamshell Key Repair Service - Mini Cooper Register Forum
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