Firstly, if you are driving it like you stole it, for example belting up to every roundabout in Milton Keynes and stopping from full speed repeatedly the you can overheat brakes and can warp the discs.
Assuming this is not your style, then several things spring to mind.
1 front calipers either pistons and/or sliders seizing leading to overheated front brakes
2 front hubs not cleaned properly before discs fitted, run out should be checked when the next new set go on
3 rear brakes poor effort meaning all braking effort is left to the fronts
first thing i would do is drive up a dual carriageway for several miles without braking and stop the car gently without braking into a convenient layby, usig handbrake gently to come to a final rest, the have a good feel round the brakes, the fronts should be cold at this point especially, the rears just warmed by the slowing into the layby.
Then brake normally and again check see all brakes have a healthy warmth about them.
You don't need to buy genuine parts but neither would i buy brake parts from unknown sources, i would suggest you get Pagid (or any good make) pads and discs from Carparts4less..Eurocarparts online sister company...and get a good mechanic to go through the whole braking system especially the rears paying extra ttention to the wheel cylinders/pistons, possible the rears are past their best.
One other thing, if you stop from a high speed, try to release the brake pedal as the car comes to final rest, keeping hard pressure on the brakes when stationary very hot after a prolonged heavy brake can transfer pad material onto the disc, this can give similar feelings to warped discs.
Edited by gordonbennet on 05/10/2013 at 16:03
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