well few days after i first noticed the nail and it has lost no further pressure, granted i have not driven it since either.
anyway, im planning on changing it over for the tyre from my dad's car (only had a few thousand ks on it). The story with his was that he noticed a nail but no pressure loss. A guy at the bmw dealer sprayed some water over it and it seemed to bubble (dont know how reliable this test is though???) when my dad's tyre got changed the guy said the nail had not gone through, but didnt give a reason why it would then need to be changed. anyway we kept the tyre.
i've attached some photos, the first two show my tyre with the nail sticking out of it, and the second two show my dad's old tyre, its quite a small hole and i could not see any evidence of a hole on the inside side of the tyre...
what do you guys think?