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Thread: security keys & ECUs

  1. #1
    I definitely ain't a Chief Engine Builder wagonist's Avatar
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    Default security keys & ECUs

    With the newer cars, they have a security coded key.
    I've got the opportunity to pick up a cheap car because the key is missing.
    If I get a matching key, ignition barrel & ECU from a wrecker of the same spec vehicle, can I simply install those to get the car working again?

  2. #2
    Junior Member Automotive Encyclopaedia
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    Default Re: security keys & ECUs

    it should but then u have the doors are not the right key
    which is ok but long term can be a pain

    anyway what car is it
    some cars are easy to code
    somre are a pain
    some toyotas also have an immobiliser ecu so u need that too

    i have programmed afew toyotas where all keys are missing
    its hit n miss and sometimes u take half a day
    but its still cheaper than buying new engine ecu

    toyotas are hardest to get working if all keys r lost
    toyota recomend new engine ecu which comes in a virgin state
    ready to accept the first key inserted
    well this could cost over and up to 1500 or 2000 bucks

    i have been playing with reading the immob chip onboard the ecu and programming keys that way
    but im still new to this so its all a big learning curve

    holdens are easy
    u just need a scanner or for later ones tech2 scanner and tis software which i have

    fords r easy by using demister button
    newer fords u need ford ids which i have but not used much

    nissans are easy if u have scanner and correct software

  3. #3
    Administrator Backyard Mechanic
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    Default Re: security keys & ECUs

    What year is it? I have an ecu + key from an 06 model that could be sold to you..

  4. #4
    Junior Member Too Much Toyota oldcorollas's Avatar
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    Default Re: security keys & ECUs

    buy a key from the dealer.

    even BMW135 keys are only $700 or so


    unless of course the car is stolen...
    "I'm a Teaspoon, not a mechanic"
    "There is hardly anything in the world that a man can not make a little worse and sell a little cheaper" - John Ruskin (1819 - 1900)

    AU$TRALIA... come and stay and PAY and PAY!!! The moral high horse of the world!

  5. #5
    Junior Member Automotive Encyclopaedia
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    Default Re: security keys & ECUs

    u can use clone keys but they r hit n miss
    i fkt around with a nissan and it kept loosing the key
    would start after i programmed it but once u turned car off it would fail

    bought genuine key for 150 bucks programmed it and no probs
    so u need to know which clone keys work otherwise get genuine keys

  6. #6
    I definitely ain't a Chief Engine Builder wagonist's Avatar
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    Default Re: security keys & ECUs

    The car is only worth $800 (about $4k - $5k intact), so I'm hoping for a couple hundred to just get a matching key & ECU out of a wreck, and probably the door locks also.
    I do have an ECU & key here, but apart from needing them, I don't know if that will work (and this car isn't handy to just go try either).

  7. #7
    Junior Member Automotive Encyclopaedia 2jzhilux's Avatar
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    Default Re: security keys & ECUs

    What car is it?
    Will help determine what you need to do.

  8. #8
    Junior Member Too Much Toyota oldcorollas's Avatar
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    Default Re: security keys & ECUs

    what did the dealer quote for a new key?

    $800 for car and 4-5K intact leaves you with at least $3000 to get a new key

    it seems unlikely that a ky for a relatively new car worth $5000, would be more expensive than a BMW key at $700.

    callt he dealer before you call a wrecker and stop f#ckign around.
    "I'm a Teaspoon, not a mechanic"
    "There is hardly anything in the world that a man can not make a little worse and sell a little cheaper" - John Ruskin (1819 - 1900)

    AU$TRALIA... come and stay and PAY and PAY!!! The moral high horse of the world!

  9. #9
    Junior Member Automotive Encyclopaedia
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    Default Re: security keys & ECUs

    Who know what the fk anyone is talking about
    We don't know what car it is
    Maybe he doesn't want anyone to steal it
    As some cars it's easy to bypass immobiliser
    Just not toyotas

  10. #10
    I definitely ain't a Chief Engine Builder wagonist's Avatar
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    Default Re: security keys & ECUs

    Thank you.
    I thought I asked a pretty simple question in the first post, I didn't ask for other's value judgements on what I should do with my money.

    I also have the required ECU with matching key here already for another purpose, but I'm aiming to find a cheap car for someone who needs cheap reliable transport.

  11. #11
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    Default Re: security keys & ECUs

    well if u knew how keys and security work then its not really a simple question
    theres a million differnet cars in the world and half a million different ways to program keys

    anyway if u have the ecu and key it will start as i did it the other day on a customers car
    not sure what model it was thou but i just said have this ecu and key and it will work hehehehe

    we can close this post now porblem solved

  12. #12
    Junior Member Automotive Encyclopaedia
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    Default Re: security keys & ECUs

    its probably a bogan commodore
    thats y yr keeping it secret ive read on here they dont like them

    also only some cars store the key code in the engine ecu
    the other have have it elsewhere in the car so u need that too

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