Help needed! Squeeky breaks

[FOR5E]

Does anyone know the cause / fix for squeeky rear breaks (when travelling slowly, not applying breaks) car's an under 30k 6 series???

[photo_ed]

Rear caliper pistons sticking? Squeaking caused by the pads binding slightly with the discs.

Is the car kept outside and stood alot? If so there could be surface corrosion building up on the discs.

Or something to do with the handbrake mechanism? Apply the handbrake a few times when rolling slowly and see if it goes away.

[FOR5E]

i havent long had the car, i dont keep it sood for long! It doesnt seem to alter with handbreak, alters slightly with breaking, and goes if you break hard

thanx

[Vee]

Check how much pad is left.
My E46 did this when the rear pads were low.

[noneedtolift]

Very very likely to be your hand brake pads/ mechanism. Retainer clips often come loose and lead to the pad carrier scraping in the drum.

[T-bagger]

Sounds very much like the rear brake pad wear sensor. BMW have modified both the material and the shape of them (for this exact problem), due to the fact they are now 'two-stage' and therefore come into contact with the disc much earlier than the old type; 6.4mm thick versus the old 3mm thick type. The problem is often caused by the pad sensor rubbing the lip on the outside of the disc, nothing to worry about as the tolerance between pad and disc is ver small.
To cure it you'll need a new sensor and also new pads if the sensor is worn, otherwise the new sensor will be thicker than the friction material on the pad. The good news is that if you have a BMW warranty this should be covered and you'll get new rear pads thrown in too!

[FOR5E]

T-bagger said:

Sounds very much like the rear brake pad wear sensor. BMW have modified both the material and the shape of them (for this exact problem), due to the fact they are now 'two-stage' and therefore come into contact with the disc much earlier than the old type; 6.4mm thick versus the old 3mm thick type. The problem is often caused by the pad sensor rubbing the lip on the outside of the disc, nothing to worry about as the tolerance between pad and disc is ver small.
To cure it you'll need a new sensor and also new pads if the sensor is worn, otherwise the new sensor will be thicker than the friction material on the pad. The good news is that if you have a BMW warranty this should be covered and you'll get new rear pads thrown in too!

thanks, to me that sounds like the answer! thanks to the others for their help too.