Section 90 (Power Rack & Pinion - E36): Lubrication: Capacity
WARNING: This page does not describe the selected car, but rather 61 other vehicles, including the 2002 BMW Z3, 2002 BMW M Roadster, 2002 BMW M Coupe, 2001 BMW Z3, and 2001 BMW M Roadster. However, it is still accessible from the selected car via links, so may be relevant.
Fluid capacity is 1.3 qts. (1.2L).