This fuel filter for the E46 325i/330i, Z3 2.5i/3.0i is made by OEM supplier Bosch, who supplies many parts to BMW. This fuel filter should be replaced every 36,000 miles as part of your regular maintenance to prevent clogging. Once clogged, the fuel filter will restrict the flow of fuel and may cause hard starting or non-starting conditions as well as drivability issues (sputtering, bucking, etc), and may trigger lean fuel condition fault codes. A clogged fuel filter has also been known to cause more severe damage to components such as the fuel injectors, fuel pump, as well as internal engine damage. If a fuel shortage issue isn't solved right away, you can literally ruin your engine!
Thankfully a fuel filter is cheap insurance. This particular fuel filter is for the E46 3 series (325i, 325xi, 325Ci, 330i, 330ci, 330xi) as well as Z3 with the M54 2.5 liter and 3.0 liter engine variants. This filter is made be Bosch, an OEM supplier to BMW and other German manufacturers for fuel filters and other fuel system components. It comes with a two year warranty.
E46 (99-05) > 325Ci
E46 (99-05) > 325i
E46 (99-05) > 325xi
E46 (99-05) > 330Ci
E46 (99-05) > 330i
E46 (99-05) > 330xi
E36/7 / E36/8 Z3 (96-02) > Z3 2.5
E36/7 / E36/8 Z3 (96-02) > Z3 3.0