Don’t slam your DB9’s Bootie – Changing the Boot Lid Gas Strut on an Aston Martin DB9

Ever since I bought Aston 2209 the boot has effectively closed under free fall. We have of course learnt to be careful with it, but after a couple of frighteners where we have dropped it and it has slammed shut I decided for the small amount of money involved it was crazy not to resolve the problem. The potential for breaking the rear glass really exists. The boot lid is supported on gas struts that are part of the hinge assembly but once the gas has started to leak away they loose their effectiveness. Even when you have removed an old gas strut you will find it very hard to depress so you might think there is nothing wrong with it. Unfortunately there is, so bite the bullet and buy a couple of new ones.

[Editors Note:  I’d like to thank Mike Potts (@aston2209) for contributing his time and knowledge in writing this article – Thanks Mike!]

The method for changing them is quite simple with only a narrow bladed screwdriver being required. As with all jobs that are near the paintwork take care and use covers or microfiber cloths to protect the immediate area.

If only I had taken my own advice !!!   I removed both the old gas struts and carefully pushed the boot lid back until it came to a rest in the fully open position. I wrongly assumed it was resting on the hinge bracketry but it was actually resting against the edge of the rear window. 

This image has an empty alt attribute; its file name is image.png
Chipped paint on boot lid due to contact with rear window glass edge

When I had fitted the new gas struts and closed the boot lid for the first time I saw a chip in the paint. I couldn’t work out where this had come from and decided to remove the struts and move the boot lid carefully to see if I could establish what I had done. By slowly moving the boot lid backwards it was clear that the hinge did not stop the boot lid before it came to the glass.

It’s an easy job but take your time and DON’T REMOVE BOTH STRUTS at the same time. It could just as easily been the glass that had broken so be careful.

Here is a short video showing how to change the struts.

Mike (Aston 2209)

8 thoughts on “Don’t slam your DB9’s Bootie – Changing the Boot Lid Gas Strut on an Aston Martin DB9

  1. Graham Rollins

    This thread is very timely, having just filled my car of petrol some 20 miles south of Edinburgh plus fuelling a couple gallon cans for auxiliary tools. With the boot lid open and fuelling the cans the lid slammed shut and frightened the life out of me!
    Definitely my next project.

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  2. stuart carson

    Hi Steve,

    Now that you fitted new struts, how does the boot lid behave? I fitted two new OEM struts a few weeks ago from – I think – a reputable supplier mentioned in this blog often and there is basically no difference. Still slams dreadfully if allowed to fall under its own weight. I had imagined it would self open when released …or at least close less catastrophically, but no.

    I am wondering if I was sent old / deteriorated stock and need to request replacements, but had nothing to compare against…until now. Please advise. Thx Steve.

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    1. mike2209

      Hi Stuart,

      It’s Mike (Aston 2209) here, it was me who posted the Blog on changing the gas struts on the boot. I always buy OEM parts from Aston Martin direct so I know I’m getting the genuine item ! That said I have bought direct from Brembo for rotors/discs and EBC for brake pads. There is always a temptation to buy from other suppliers particularly when spares can be quite expensive also there are some sellers on auction sites who will say a part is OEM when perhaps it isn’t.

      The gas struts I received performed perfectly (when compared to the old units) and if you watch the video with the article you will see how the boot lid moves now. I’ve just been out and checked the operation from inside the Aston (to see if it self opened) as it was something I meant to check for myself but kept forgetting about it. When I operate the switch in the Aston there is a click from the rear which is the boot lock releasing. The boot didn’t self open but when you go to the boot it will lift up but it does not move when the lock is released. I must admit I was also hoping that the lid would have lifted on it’s own from closed to fully open, but at least it doesn’t slam down now. In operation you have to lift it about half way and then the gas struts take over and lift it the rest of the way. On closing the boot lid has to be pushed for the first half and then drops the second half, again check out the video. Can anyone else give some feed-back on how their boot opens and closes please.

      If your new struts don’t seem to make any difference then send them back for replacement, you could always refer them to my video to show them the minimum you would expect from a new set of gas struts.

      When I received the new gas struts I did a somewhat crude experiment by trying to compress the struts. I could depress the old struts when I pressed them against the floor but it took quite a lot of force, I was surprised. The new struts were impossible to compress by pushing them against the floor. You could always undertake you own test with one of your old struts and one of the new struts and see what the comparison is.

      Let us know how it works out,

      Mike (Aston 2209)

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  3. Robert Haywood

    Having viewed the video posted by Mike, I replaced the struts on my car (2005 DB9), but with parts purchased from SGS. These were slightly less costly than the AM parts and are slimmer. I confess to having experienced some problems with getting the spring clips to retract symmetrically, but eventually managed to get the new struts on. The boot lid now closes and opens as Mike has described, so I am happy. I too had hoped that it might open when the internal button release was operated, but ho-hum. Oddly, I am a retired engineer, who also succumbed to getting a personalised plate, X20 RGH. I confirm also that I am getting more and more grumpy!

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  4. mike2209

    Hi Grumpy Robert,

    Good to hear you managed to sort out your boot struts and that they seem to be working OK.

    My DB9 is also a 2005MY and I do all my own servicing and repairs, once you get to know your car it’s technically no different to any other, except looks, power, style, etc., etc., etc..

    If you do any jobs on your DB9 drop us a line and if it’s something we haven’t covered already Steve might consider it for the Blog.

    Good luck,

    Grumpy Mike (Aston 2209)

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  5. Chris Seymour

    I replaced mine with the OEM shocks on my ’11, thinking that its heavy bootie must not be properly countered by the original shocks. It didn’t make a difference, unfortunately. I haven’t had any dis-functionality, it’s just that the trunk is heavy. Ideally, I wish the shocks were a notch higher pressure to lighten the trunk a little.

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    1. mike2209

      Hi Chris,

      Couldn’t agree more a little more pressure would go a long way, might even make the boot open on the internal release switch, don’t see the point of it if the boot doesn’t lift. Difficult to understand why Aston haven’t jump on the issue before now.

      Thanks for the comment, all comments and experiences are always welcome.

      Mike (Aston 2209)

      Like

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