
The cost is ridiculously low, just £8.60 for the box (p/n 52 10 7 044 958) and £3.90 for the Z4-specific support bracket (p/n 52 10 7 045 018).

Box as installed on the passenger side

Custom first aid kit to fit the box

Here's a side view of the box

And a view of the bracket showing the three screw holes

All you have to do is screw in the three screws and snap the box on, but the screws I had been given were the wrong thread. Working upside down in the confined space is frustratingly difficult and at one stage I was seriously considering taking the seat out to install the box!

I used a mirror to establish the passenger box was held on with Torx 30 screws, then unscrewed one of them and matched the thread with some loose screws I had around. Success!

View of the empty box on the driver's side with seat in raised position.

View with box close and seat in lower position.
Tim