Here is what the brochure states;
Lock-out service
Your BMW is equipped with an advanced entry
system, which cannot be bypassed by traditional
locksmith methods without significant damage to
your vehicle. BMW encourages you to always carry
your spare wallet key separately from your other
keys. However, in the event that you find yourself
locked out, a simple telephone call to Roadside
Assistance will help you get back on the road. A
representative will help you to arrange towing
service to the nearest BMW center.
Related towing costs will be compensated up to
$100 per incident. You – or the person driving your
vehicle – are responsible for any expenses related
to replacement keys.