There is known problem of 307s gaining extra miles. This is normally about an extra 30-40%. I've spoken with my local dealer who says that Peugeot are about to recall all the affected cars to fix the problem. However, they won't be able to remove the falsely added miles. Owners are supposed to contact Peugeot for compensation. I've informed BBC Watchdog about it. If you're affected, I suggest you do the same.
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Andy