I don't know of specific issues in regards to the 14's; I would however recommend a CPO car or that you purchase a warranty from a 3rd party.
These cars are solid but any car can have a major issue and these cars are no different with the exception that repairs can be costly; just read some of the recent posts in regards to stock cars needing new engines. I believe these are exceptions and not the rule but it can happen to anyone especially when you're not the original owner.
Pull the service history to have a better understanding of maintenance and any other issues that may have occurred.
Good deal of information on this topic if you do a search on this forum.
Best of luck.
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CURRENT: 22' INDIVIDUAL M5| CHALK | TARTUFO | CCB | MPE | H&R | IND
GONE: 19' M5C| SINGAPORE GREY| ARAGON|VELOS VLS-06|H&R|iPE|IND|XPEL|CF|RADENSO
GONE: 15' F10 M5|BSM|BLACK|VELOS VSS-S2|KW|AKRA|IND|CF |ESCORT 360|VELOS PIGGY
GONE: 13' F10 M5|SG|BLACK|AKRA|KW|IND
LONG GONE: 09' E60 M5|02' E39 M5
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