Iv had this problem for a while, iv posted on here and had quite a lot of feed back regarding the flex disc, I took a look but it looks new from looking at it from underneath, it drives me mad, I especailly get the vibration going uphill at a steady speed, its kind of a off and on vibration if that makes sense! Do x5's have just one flex disc? I'm not a mechanic so me checking myself was probably a waste of time though it did look in good condition but I didn't take the part off to inspect it properly! Would it need to be taken off to know if the flex disc was knackered? Cheers

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x5 is gone