Autowatch 555CLAM

Autowatch Product range

Autowatch Product range

The 555CLAM  is an upgrade alarm from Autowatch. It features the same battery back-up siren found on the 446RLi Premium and also has a small attack proof security housing.

As with all upgrade alarms the 555CLAM is designed to operate from using your factory remote control. (read the Upgrade Alarm Introduction post for a better understanding).

The Autowatch comes with a glass break sensor as standard (in New Zealand). This can be changed depending on your requirements. In Europe, the 555CLAM comes with Ultrasonics and is approved as a Thatcham CAT 2-1 upgrade alarm.

Intelligent alarm!

The 555CLAM is intelligent, where lesser upgrade alarms simply monitor the signal wires to arm and disarm. (see Mongoose and Dynatron in the coming weeks) The Autowatch can actually learn the timing sequence. This makes it a great alarm for any competent installer and if fitted correctly makes it impossible to trick into disarming by sly methods!

Volatile Memory Issue!

Having said that I highly recommend installing the 555CLAM in what Autowatch call “Master Motor Mode” where possible. The 555CLAM has an issue where it can lose it’s programming memory if the battery is slowly discharged. It seems OK if the battery is disconnected when fully charged, but if left to go flat over a period of time the alarm programming is often reset.

Remote Boot Bypass

The 555CLAM has a boot sense wire which means that if your factory remote has a boot open button then the Autowatch will disarm the boot and the internal sensor when it is pressed (leaving the main doors still armed), then fully re-arm upon shutting the boot.

Other Features

The keyguard feature (Note: it is only an option) is a nice idea on paper. It involves having to press a hidden switch every time you start the car, in reality, this is going to become annoying and will end up being turned off! Cobras Drivers card is a far more sophisticated way of guarding your keys against theft.

Horrid emergency over-ride!

One of the weak points with the 555CLAM is the pin code over-ride. It requires turning the ignition on, then pressing the over-ride switch to start entering the code (see user manual for full details). The switch is ugly so it’s not realistic to place is in a nice location. I’ve seen some installers place them installed behind the glove box before now making it mission impossible to for the user should they ever need it! It really could have been better thought out.

The door inputs also need to be boosted with relays on some cars to trigger the alarm. Whilst this is not a problem for the user it is annoying from an installers point of view.

Autowatch 555CLAM!!!

Autowatch 555CLAM

RRP NZ: $570.00

Insurance Approved

Obsessive Rating: A versatile alarm which is very effective!

Would be great to see it come with a pager out-put, and the over-ride pin code needs a better design, but on the whole a good alarm so long as you don’t let your battery drain!




Additional Information:

Diagnostic Alarm Trigger Reports

PDF icon555CLAM User Manual

This entry was posted in Autowatch, Car Alarms, Reviews, Upgrade Alarms and tagged . Bookmark the permalink.

33 Responses to Autowatch 555CLAM

  1. Pingback: Autowatch Immobiliser | Obsessive Vehicle Security Blog

  2. Avatar Stevo says:

    How do I turn off the annoying “chirps” when I arm/disarm the 555 CLAM?

  3. Avatar Julian says:

    Your local Autowatch dealer should be able to turn the chirps off for you.

  4. Avatar Munish says:

    Hi I have a ’09 Ford XR6, can you please suggest if 555 CLAM alarm be good for it or which one will provide more security to the car?

    Thanks much!

  5. Avatar Julian says:

    If your Falcon is the New shape (FG Series) then the 695CAN would be my recommendation.


  6. Avatar Munish says:

    Thanks Julian, yes it is FG Series; Are you able to give me a quote??


  7. Avatar Julian says:

    Hi Munish,

    I’ve just sent you an email with pricing for the 695CAN


  8. Avatar Glenn says:

    Hi, would this be a good alarm for an EVO7? I was considering the Mongoose MAP80 until I read your review….. 😉

  9. Avatar Julian says:

    Hi Glenn,

    Yes it would, but only if your Evo7 has a factory transponder immobiliser.

    This post covers the details:

  10. Avatar Glenn says:

    Hi Julian, thanks for that… I will need to confirm. If not, what would be your recommendation for an alarm that also has at least 2-points of immobilisation?

  11. Avatar Julian says:

    That really depends on where you are located (the installer matters) and your requirements. Flick me an email ( and I can send you some options rather then go off subject here.

  12. Avatar Bill Keesing says:

    I am looking at putting an alarm in my 2000 Holden Commodore VT. Would this alarm be suitable for my vehicle?

  13. Avatar Julian says:

    Hi Bill,

    The 555CLAM works fine in the Commodore VT.

  14. Avatar Tim says:


    would this system be suitable for a 1996 BMW 316i (E36)? And can can I do a DIY?

  15. Avatar Julian says:

    Hi Tim,

    Autowatch systems are only available with installation here in NZ.
    Assuming that your E36 has existing keyless entry and Immobiliser then the 555CLAM would be suitable.

  16. Avatar Gary says:

    replaced vehicle battery and now the alm not working. The light will flash once and siren beep once when reset swich pressed.

    When I lock and unlock the vehicle now the alm will not cherp as before and no light indication duing this operation of arm and disarm.

    What is the sequence I need to follow to reset the alm after vehicle battey replacement please?

  17. Avatar Julian says:

    Hi Gary,

    I have an agreement with Autowatch that prevents me from publishing fitting/programming instructions.
    It’s also worth noting that the programming sequence varies depending on how it was wired up. My advise would be to take it back to the original installer, failing that go to your local Autowatch dealer.

  18. Pingback: Some jobs are best turn down! | Obsessive Vehicle Security Blog

  19. Avatar Divesh says:


    I have an Autowatch 555 Clam fitted in my vehicle here in south africa

    The technicians at pfk has told me that this system does not have an overide pin code??

    can you plase kindly confirm.

  20. Julian Julian says:

    Hi Divesh,

    Yes the 555CLAM does have a pin code over-ride. If you read the review you just commented on you’ll see that I mention how horrible it is to use. I also refer to the user manual which is in PDF format at the end of the review.

  21. Avatar johan says:

    Hi,i have fitted a 555 Clam in my 2012 Hyuandai Accent,like one of the others also said that the annoying chips when arming and dis-arming,i then asked the installer in Cape Town to mute the sound.They say it is not advisable because it will course problems,please advise.

  22. Julian Julian says:

    Hi John,

    The chirps can be turned off with out any problems. I always program arm/disarm chirps to be off unless otherwise requested and have never had any issues from doing this.

    You should be having this conversation with your installer. I’d ask your installer to explain what problems they think it will cause? Let me know what reason they give you! 😉

  23. Avatar Hill says:

    Hi Larry.
    I had the same alarm installed in a 2012 Micra. Installer also told me he couldnt rurn off the arm/disarm chirps. Can you please tell me how to than I can try it myself. Thanks

  24. Julian Julian says:

    Hi Hill.

    Who the hell is Larry?

    I don’t give out programming instructions as if you get it wrong you can damage both the alarm and the vehicle. Take it back to your installer as he has a responsibility to service the alarm under warranty and program it as requested.

    The arm/disarm chirps can be programmed on/off, if your installer won’t do it then complain to Autowatch an have them put the thumb screws on him 😉

  25. Avatar Josh says:


    My Auto Watch 555 CLAM alarm was set to arm, while I went on holiday.

    My car battery discharged over the period and I think the alarm has been reset as a result. When I turn the vehicle off I get a single fast chirp, but arming/disarming only locks the doors and flashes the lights (no chirps).

    Who could you recommend in Auckland who can reprogram? Would appreciate your help. Thanks for running this site, it’s a great reference tool.

  26. Julian Julian says:

    Hi Josh,

    The 555 CLAM has a volatile memory where it will lose its programming if the battery slowly drains. I’ll only wire them up to work on the default programming mode these days, this way there is never an issue 😉

    Give Kishor at Autowatch NZ a call, he should be able to sort it out for you.


  27. Avatar Stephan Steyn says:

    Hi, is it Really nessesary to fit an relay if I want to use the horn pulse feature? Since it will only trigger the factory relay for the factory horn. Thanks

  28. Julian Julian says:

    Hi Stephan,

    I don’t recall saying that a relay is required for the horn pulse feature so I’m assuming that you are an installer looking at the wiring diagram?

  29. Avatar Stephan Steyn says:

    Yes, I am looking at the Diagram and on it it says: If horn pulse is required connect via a relay, My thoughts are that If you are going to use the factory horn trigger wire of the vehicle from the horn switch in the car it is not needed. or is it required because It cant handle the backfeed if you press the car horn manually and it recieves an input


  30. Avatar Koos Schnetler says:

    My Hilux battery went down slowly and we tried to jump start the battery as the hilux is auto and then the alarm activated of the 555 clam and we could not start the vehicle and got the installer to come out and he blamed us jump start the hilux and had to bypass and removed the 555 clam unit that according to the installer is blown due to jump start.

  31. Julian Julian says:

    If the battery slowly discharges the 555 CLAM can lose it’s programming memory. The best fix would have been to simply re-program it, or to have had it wired up to work with the default programming setting so that it will still work even if this happens.

  32. Avatar Lindsay Blake says:

    Hi Julian,
    We have just bought a 2010 Subaru legacy sedan 2.5 (no turbo) Keyless entry and ignition. It has a factory immobilizer . Are these efficient ? If not what alarm system can you suggest would be suitable for the car and also for 2 pensioners to operate ??
    Lindsay Blake.
    ps. Keep up the good work. Your sight has been very helpful .

  33. Julian Julian says:

    Hi Lindsay,

    I’d recommend a decent CAN-BUS alarm for your Legacy such as the Cobra AK4615 as it will integrate better with the Legacy then a PLIP alarm.
    If you are based in Wellington then feel welcome to give me a call to discuss it.


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