Removing your Aston Martin DB9 Front Under Tray is part of many service events.   It’s funny to note that although removing the front under tray is referenced at least 50+ times in the official Workshop Service Manual, there is no section anywhere within that manual that explains how, or lists the torque of the bolts [Aston are you listening?].  Taking it off may sound daunting, but it’s not too bad.  Most of the work is in the prep which will probably take you 20-30 minutes.  I’ve made posts for each of the prep steps:

• Preparing to remove the road wheels
• Single Point Jacking
• Getting the car up onto Jack Stands

Once you have the car up on jack stands, it’s just a matter of crawling under and removing the forty (40) T30 Torx screws holding the tray in place.  Pretty simple actually, and only takes about 10 minutes.

I was a little particular about how I removed the screws, essentially removing them from back to front:

• First I removed the six along the front bumper.  They were a larger head screw, but still a T30 Torx.   As I learn later in the reinstall, these large headed screws actually belonged I different positions on the under tray, and the dealer installed them wrong.
• Next I removed the 4 large head screws holding a center air inlet duct.   This step could probably have been omitted since the inlet was fully part of the tray, but I think it made access a little easier.  I think this inlet might be on early cars only, I’ve seen pictures of other car under trays that don’t have the same inlet.   I think this funnels air across the Oil pan/sump to help with cooling (referenced in the Aston Martin official parts manual as Sump NACA duct).
• I moved to the rear edge of the tray, and started to remove rows of the screws, moving from back to forward.   The last screw I would remove from each row would be the center (where possible) so that it would support the weight as I was under it.
  Eventually the tray begins to sag under its weight, and I used a high tech plastic bucket to support it while I continued to move forward row by row.

After I had the last screw removed, the final step was to gently pull the tray rearwards to slip it off the front bumper lip, and then it will drop free of the car.

I used an Air Wrench for the removal to speed up the process, but I would caution about using it on the reinstall since it would be easy to over tighten a screw and strip out the threads.

I would suggest checking the condition of the screws and giving them a quick degrease when you have them off the car.  One of my screws was missing (rattled loose and dropped away I guess), and two of the large head ones at the bumper were worn down a fair bit from nose dragging the car leaving parking lots.   I ordered these from my local Aston dealer to replace them as I reassembled.

I have made a YouTube video detailing the process:

Check out my post on How to Install the Front Under Tray for a few tips I learned putting it back up.

Here is a photo gallery of the Front Under Tray in case there is some view that helps you figure out something on your project.