Cobra 8510 Immobiliser

The Cobra AC8510 seems to have been around forever and although I must confess to not having read the bible from cover to cover, I would expect that Noah had one on his arc to stop his outboard motor from being hot-wired!

This immobiliser is so old that Cobra has updated their logo twice since it first appeared and yet still it remains unchanged!

Well enough faffing about, here’s the review:

The AC8510 review

Cobra 8510 Immobiliser

Metal Security Housed Immobiliser

The first thing that strikes you about the AC8510 is its metal security case. It’s about as solid as any immobiliser system I’ve ever come across. You’re not going to get past it by simply flipping open up the case as you would with say, an AVS!

On top of it being attack-proof, it is also small. It measures in at 10cm x 3cm x 4.5cm

 Touch Key Immobiliser

When the LED is flashing the immobiliser is armed. It Auto arms 60 seconds after turning the ignition off.

Now personally I’m not a huge fan of touch keys as they involve me having to think. To disarm the immobiliser you have to press the touch key to the receiver pad which then gives you a 60-second window to put the key in the ignition and start the car. OK, it’s no more difficult than disarming a remote immobiliser, but my personal preference is still for a transponder immobiliser. On the plus side, there are no batteries to worry about going flat.

Installed Price: $280.00
Insurance Approved: Thatcham Cat 2-1 
Obsessive Rating: Simple but effective

Despite getting on in years it’s a very effective immobiliser when installed well.


  • Dash-mount LED/Touch Key receiver
  • Two electronic anti scan touch keys
  • Two Immobiliser Cuts

Update April 2020

Brighter LED is now an option for the 8510:

Cobra 8510 now with Blue LED option

About Julian

Owner and Installer at Obsessive Vehicle Security Limited. More details here... Please keep Comments relevant to the post and use the Contact form for enquiry's
This entry was posted in Cobra, Immobilisers, Reviews, Vodafone Automotive and tagged , , , . Bookmark the permalink.

14 Responses to Cobra 8510 Immobiliser

  1. Julian says:

    Update: I’ve purchased a big bulk load of these so can offer them at $270.00 installed whilst stocks last 😉

  2. Pingback: How effective is your Immobiliser? | Obsessive Vehicle Security Blog

  3. Alex says:

    Hey Julian,
    First off thank you very much for running such a comprehensive site on car alarms. I had been looking at reviews for alarms on serveral sites before I followed a link here. Now I only use you as a reference because your info is so good.
    Secondly do you only do installs in Wellington? I would definatly be interested in getting you do install a Cobra 8510 Immobiliser in my car but I work 6 days a week and so a drive down to Wellington just isn’t an option for me.
    If you don’t then could you possibly recommend a installer up here in Auckland for me?
    Many thanks,

  4. Julian says:

    Hi Alex,

    Great to know you’ve found the website helpful.
    I’m only in Wellington. This post explains: (excuse the sarcasm).

    Whilst I can’t guarantee the workmanship of others the Cobra website lists nationwide installers.

  5. Alex says:

    Hey Julian,
    Thank you for your quick response.
    Ah no I hadn’t seen that page saying that you only work in Wellington.
    Thank you for providing the Cobra website details.
    “Whilst I can’t guarantee the workmanship of others the Cobra website lists nationwide installers.”
    Is a very true statement as it seems thats theres a lot of muppets out there!
    Hopefully I can find one who isn’t too bad though. 🙂
    Kind Regards,

  6. Julian says:

    Hi Alex,

    I can recommend Bret at Trends Car Stereos, who is based in Hamilton if you can make it that far.

    If not make sure you clue your self up and ask the right questions:

  7. John Smith says:

    I bought Cobra 8510 and manual says that immobilize 10A circuit (max 20A for 3 sec). My plan is to immobilize starter solenoid and + wire to ignition coils. Do I need aditional relays for that?
    Many thanks,

  8. Julian says:

    Hi John,

    That all depends on how many amps your Starter and Ignition coils draw!
    Most cars will be fine but if in doubt then check the fuse rating for each.

  9. John Smith says:

    Hi Julian,
    Car is VW Golf MK4 1.6 16V. It has 1.1kW starter and fuse for ignition coils is 15A.
    This is what confuses me. If it’s 15A fuse for coils than current should be lower if everything is OK. Correct?
    One more question. If current goes over 20A or at 20A takes longer than 3 sec. what will happen. Immo will be destroyed or just switch off.
    Many thanks for your help.

  10. Julian says:

    The MK4 Golf should already have a factory transponder immobiliser!

  11. Dion says:

    Are you able to supply additional touch keys? We have recently bought a Nissan that has one of these touch keys, I need a second one for my wife.

  12. Julian says:

    Yes I can supply you with a replacement but please use the contact form rather posting your details in public.

  13. mark GC says:

    HI Julian

    when replacing my car’s battery, will the Cobra 8510 work as normal after, or is there some special procedure I need to know when disconnecting and replacing the battery?
    Many thanks

  14. Julian says:

    Hi Mark,

    It will work as normal once the new battery is in.

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