I've noticed this when going over bumps and mainly in cold weather. Hasn't bothered me enough to do anything about it yet.. probably my music is usually very loud
good to know there is an easy fix! Thanks!
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Current: '16 F80 BSM/SO 6MT | '17 F54 Clubman S [Wife's]
Previous: '14 E84 28i, Valencia/Terra/X-line, '12 F25 35i ZAP, Jet/Chestnut, JB Stage 1, '88 E24 635CSi, '00 S4 Imola/Black Stg II APR/Milltek/AWE & some garbage GM SUVs!