BMW Genuine EXPANSION TANK For X5 4.4i X5 4.6is Z3 2.5 Z3 2.5i Z3 2.8 Z3 3.0i BMW X5 2001 Coolant Reservoir Fits: BMW X5 02-03 4.4L | BMW X5 02-03 4.6L | BMW Z3 99-02 2.5L | BMW Z3 01-02 3.0L | BMW X5 00 | BMW X5 01 4.4L | BMW Z3 99-00 2.8L | BMW X5 04-06 4.8L