Missing Front Brake Disk Retaining Screw

I stripped the front near side Brakes at the weekedn to see if there was an obvious reason fro a light pull to the left under braking and sterring wobble under braking at 50mph.

All cleaned and lubed and no obvious problems but I did notice the disk retaining screw was missing. How much of an issue is this? I know that the wheel will hold the disk to the hub so I can't imagine this would be the culprit?

Unlikely tobe an issue at all, lots of people don't bother replacing them when they change a disk.

If you do want one, the part number is SF108201L

You need a Size 4 bit to fit the SF108201L