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I had exactly the same problem for years replaced every thing twice and some !! The problem was guide pins being greased and bmw state they should not be greased in big bold capital letters as brake dust and road dirt gets stuck to grease and eventually hardens on the pins cease up causing caliper on the insides to push and stick to the inside of the discs pushing the wheels toe in !!! Look at the tread on rft’s there’s Olmsted a waves uneven pattern on the outside of the tyres this is more prominently visible on non rft’s , by the time the shudder stands the discs and possible control arms thrust arms drop links may be damaged so changing pins will not help unless discs and pads are changed at the same time and any damaged arms/links are changed first aswell it’s a £20 fix if you change them every couple of months and if you park up using hand brake only and not auto “P” which locks the discs on preventing pad debris sticking , hope this helps guys
E91 330d
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