Having had the handbrake retaining pins break through a corroded section of the protection plate then roll around the handbrake making a god awful bump and grind I was left with 2 alternatives.
To replace the protection plate would have cost upwards of £100 at the garage,(wheel hub removal/refit, wheel bearings and a protection plate) so a cheaper DIY was sought out, fortunately dailydoggy suggested using a pressed washer from a Triumph GT6 costing just 90p +p&p
I bought these washers from the MG Owners Club item #19 having 4 washers delivered for £5.32,
also available from Cup Washer - for 120124 at www.rimmerbros.co.uk
The issue appeared after replacing new brakes, discs and shoes all round and the washers were fitted and the car passed the MOT that month and has since passed another MOT, so good for 18mths and counting.
And so onto the repair, after jacking up the car remove the rear wheel, brake caliper and brake disc, at this point the old retaining pin fell out on the floor and was bent at near 90 degrees!
So you'll need to order replacements from BMW, mine were approx £12 for a full axle set of springs and pins, part no.34410410823 (repair kit springs).
Using a dremmel I expanded the location slot in the washer to suit the pin and trimmed the outer edge to suit the protection plate.
When locating the retaining pin through the shoe, protection plate and washer you'll probably find an extra pair of hands
comes in quite useful and a 5mm A/F T-bar Allen key is by far easier to use than a standard Allen (hex) key to push and turn the retaining pin 90deg.
In pic #1) You can clearly see the corroded area where the retaining pin should locate.
Pic #2) Shows how to remove the 10mm A/F screw, this should allow you a little more room to access and tidy any burrs on the rear of the protection plate.
Pic #3) Again shows the lower 10mm A/F screw and other corroded area of the protection plate.
In pic #4 is the new retaining pin fitted in the GT6 Washer (the washer is actually upside down )
Pic #5 Shows the washer ground to suit the pressed contour at the rear of a brand new protection plate.
Pic #6 Is the washer and retaining pin as it should look when correctly refitted.
Pic #7 Washer and retaining pin in situ on the corroded plate and holding the handbrake shoes in position.
Pic #8 Lower washer and pin in situ , as you can see there's not a lot of room here.
Pic #9 And finally back together