Are you thinking of the storage part just next to your handbrake or the one under your armrest? Next to my handbrake I have a big one (dual cupholder). Under the arm rest, something very generous as well.

Look at realoem.com with your VIN, you'll see. You'll want Vehicle trim (group 51) and then central armrest / storage parts (section 35).

Otherwise post a picture to see what you have.

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2002 Euro X5 (E53) 3.0 diesel (M57)
5 speed manual with UUC short shifter.
Pre-xDrive NV125 transfer case (chain & gears).
Factory Xenon headlights, Spyder LED tail lights
Updated vortex crankcase breather.
Motorsport dead pedal, factory fire extinguisher, factory first aid kit, factory F&R mud flaps, factory PDC

Bilstein B6 shocks F&R
Redline oil has replaced "lifetime" fluids (F&R diff, manual transmission, transfer case and P/S).
Dimple magnetic drain plugs in all compartments.