Hi! I have recently purchased a bmw 318i and i have only one key and this does not lock doors or boot.
Does a bmw 318i have two keys? on 1995 BMW 318i
Yes, it actually has 3 keys a small solid black key that is a valet key, then two other keys one should be black and has a light on it and the other key is grey.
3 types of keys, one is a valet key that might be the one you have
Perhaps locks have been replaced or you have a "valet" key. My brother's 318 had one key for everything.