Don't know about the whoom sound but the clank could be because the spring clips on the back of the pads are not tensioned enough. I had this on my 2000 323 and my audi a3. I've learned my lesson and always bend them so that the pad is very snug in the piston. When I did this my problem went away. Again don't know about the whoom sound other than maybe a wheel bearing issue.
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'07 Z4MR '22 GT4 '18 GT3 '16 GT4, '16 M2, '14 X1, '13 135is, '06 330i, '03 323 Ci, '01 330i, '99 M3 (RIP), '96 318is, some non-BMWs
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