Reading my Bentley's manual and it says to replace all the nuts and bolts when I do a pad/rotor replacement. I've never done this on any other car. Is this necessary?

My service minder says I have 370 mi until I need brake service. Can I still use the old brake sensors or should I order new ones?

I autocross in D-stock Street Tire and am considering Koni Sport Yellow adjustable struts. Can I just replace the front struts, or do I need to do all 4?

 

Its a good policy but not required. Shims and clips are mandatory. Make sure caliper slide pins are in good shape, and greased, but don't over grease. Jmo

I'd get new ones, I have reused old ones only to find a few thousand miles later the insulation on the wire has broken, and allowed them to ground out and show the brake pad warning light falsely. JMO

You can buy the 2 at a time, but they need to be installed in a full set, 4 at once. Jmo