From the drawing 2 is non Skhook and 3 is skyhook. The easiest way to check is open the bonnet, remove the cover and look for a wire coming out the centre of the shock. If you have this, you have skyhook so item 3, of not, then it’s 2 (which are handed as sat in the drivers seat)
Then you get a wheel bearing fail out the blue and that’s £1200 Inc vat out the window. Work on £3k pa but you may well end up spending a lot less if you buy a good one.
The intake rubber bit are failing and splitting so that’s the first place to test.
If you have an intake/plenum leak sparky brake and clutch cleaner around, give it 5 seconds and listen for a rise in revs.
Obs this is a source of ignition so do it on a cold engine and go easy. A fire...