Not much of an expert on ABS disc systems but I have an MOT coming up on my Peugeot 406 soon and the discs all look different to each other and there is an orrible rumbling noise at the back if you brake hard.
Although the brakes still work and dont appear to pull to one side they don't feel as good as they should in my opinion. It had all new discs and pads about 4 1/2 years ago done by a garage and cost £450 and has now done 158000 miles in total (approx 45,000 since the brake rebuild)
What needs doing and what are the possible causes as I will have to do it myself and dont want to waste any money buying bits I dont need.
The rear brakes aren't doing any work and the front one look a bit blued which suggests they have got rather hot at some stage.
Put a bag of cement in the boot and take a couple of mates who are fond of pies and beer for a spin with some heavy braking involved.
If after this there aren't nice shiny surfaces on the rear discs then the pistons are stuck and will need looking at.
Seconded! Something amiss here, beyond any shadow of doubt.
Some cars have a 'limiter' valve, which governs how much of the braking force gets applied to the rear brakes. I had an old Fiat with this.....it always struck as a primitive sort of arrangement, the regulation being governed by movement between the body and the rear axle.
I'm not an expert on this system, but I thought I'd mention it, because if this model of car has one and it's seized up, then most of the braking power is going to the front and little, if any, to the rear.
This wouldn't explain the mis-match in appearance between the front offide and nearside discs, though.
If it were my car, I'd strip down all the cyclinders and pistons to check for the ingress of contaminating material....known in the trade as s**t.
I think all modern car have a 'limiter' valve of some sort.
It's because the front brakes do the lions share of the work as the weight gets transferred forwards when you brake.
It's much more noticeable on a motorbike.
As it doesn't pull to one side I wouldn't worry about any mismatch between the front discs.
The rear nearside doesn't look like it has ever done anything much and has presumably passed MOTs in this condition so maybe not as much cause for concern as it appears.
No doubt the charts the MOT chaps look at tell a tale.
A beer run to Calais would get everything working (if you are fond of beer or have mates who are) unless something is actually seized.
That's an idea, before you do anything.......go in for a brake test at the testing station. As MarkyB says, the report tells you a lot. And if you know them, it shouldn't cost a great deal.
Regarding beer runs to Calais.........well, why not?!
They will fail these rear discs - no doubt about that! Fronts look ok - but you should inspect the pad thickness. You've done well to get 45k miles from them aftera 'rebuild' - but - it's not hard to change pads or discs - no need to pay high garage charges for work like that! I would expect to get all new discs and pads for ~£100 (wear grubby boiler suit and ask for discount!) and then fit them yourself in a day. Only slight difficulty is likely to be the need to 'wind back' the rear caliper pistons - but it can be done !
