Is the rear passenger side window on your BMW 3 Series (E46 chassis) stuck, slow, or making a bad grinding noise? Chances are, the plastic clips in the window regulator have broken. This Evan-Fischer replacement regulator will fix that. Important: This is the regulator mechanism ONLY – it does NOT include the window motor. You'll reuse your existing motor from the old unit. It's a direct fit, designed to replace OEM part number 51358212100 and others. It fits a ton of 1999-2005 BMW E46 models including the 320i, 323i, 325i, 325xi, 328i, 330i, and 330xi in sedan and wagon body styles (check the full list in the description to be sure). It's a brand new part, not remanufactured, and comes with a solid 1-year unlimited mileage warranty when purchased from the right seller. Installation requires some mechanical skill, but it's a common DIY job for these cars. Get your window rolling smoothly up and down again.