Hi, dont supoose anyone knows the size of the 3 bolts that are used to fit the undertray. I know there are several torx screws but i need the 3 bolts. Any help please?

Might be 1K0825951 which I think is M6 x 20mm.  Double check though....

Edited 1 April, 20188 yr by TheClient

Strangely enough I came on here to ask the same question, last place that did repair work on the car decided I only needed the centre bolt back in the undertray so need to find replacements.

T40 (Torx), assuming you are referring to the three rearmost bolts...

 

 

Hmm! I have DeWalt T40 bits... And they are definitey a bit "muvver goose"!*
I'll squirt some magic* on them and try again tomorrow!
(I don't want to ruin the heads with them in!)
* loose
* GT40 or similar.. Or if really stuck, a mixture of TQF and Acetone.

And so.. I could feel that horrible sensation when some metal is giving-way and had resigned myself to some Dremel-action on these three Torx-head screws, which are only holding on a half-kilo plastic tray, and have no need to even be tight.
And so I pulled a bit harder, and sure enough, the feeling of some metal giving up.......
But! It was my bargain-bin bit-holder which had simply given up, being made of cheese. I put the DeWalt bit in a socket, and the screws came out with only a little encouragement! (I still think that the T40 is not totally snug, but do they do a 40.5? )

Edited 28 July, 202528 Jul by Wakou