Still having this high pitched squeel but happens when NOT breaking its when I take my foot off at lower speeds upto 35ish I hear it. I went to change front pads but are perfectly fine cars done 7k

Now am thinking its the back wheel maybe but upon taking wheel off I saw the pen marks in the pic why would that be there i think it needs software to release rear brakes or something I read online so not diy? Just curious of this lining up marker? 7k 24 plate

Cheers

A) The EPB will need to be released. Something like OBD11 will be able to do this. You might still need to wind the calipers in anyway (rears, not front), as there could be a sticking issue that's causing your noise. Generally, with noises like this, if it's not the wheel bearing, it's not knackered discs/pads, it's not something stuck in the dust shield then it'll be a sticking (dragging) caliper. The rear caliper pistons screw in and out as they operate, so you'll need to 'screw' or wind them back in. You can get a little tool for it - don't use a screwdriver as you can knacker the piston face.

B) the mark on the hub face and disc are so that it's quick to put the disc back on when removing. Can you see all the holes in the brake disc hub/bell? The five large ones are for the wheel bolts, the three partial ones are part of the manufacturing process and then the little one with the bolt in it is just that - a disc retaining bolt. The disc only attaches to the hub one way (I.E. there is only one hole on the hub for the retaining bolt to go into. The lines make it nice and easy to just whack it on and do it up, without having to rotate the disc all the way around until the little bolt finds the little hole. See the picture below of the hub (bit behind the disc) and you'll see what I mean - you have the hub, followed by the brake disc, followed by the wheel. The wheel bolts pass through the disc, and screw into the hub. All that holds the brake disc on when the wheel and bolts are off is the retaining bolt, plus whatever rust/brake dust/magic stuff has built up over the years. On a newer car they should come off with a tap, on an older car you might need to break out the mallet, or worse.

Those pen marks are not a factory thing (AFAIK), but a mechanic/DIY thing. It means those rear discs have been off before.

Unless you're cleaning the hub, disc, and wheel faces before re-installing, it's always a good idea to put everything back in the same orientation as it was before.

Edited 13 August, 202513 Aug by OccyVRS

Thank you very helpful post. I have changed front pads a few times on previous cars so have the caliper wind tool etc

I did take the wheel off to check the usual stone stuck in guard etc and that's when I saw the marker pen line and figured wouldn't be from factory so someone for some reason has taken that off before I bought it at around just 6 months old so I was thinking no one would have had any reason to have done as wouldn't be needing new pads or discs that early

Bloody Arnold Clark may have had me as I also had to get the front bumper resprayed after a few weeks (at their cost) so I thought it may have had a small bump previously

Will continue investigating

Thanks again