Car Rear Window Regulator Without Motor Fit For X3 E83 2004-2010 OEM :51353448251 ,51353448252 Installation Simple and straightforward:Installation is a breeze, requiring no complex steps, allowing for quick setup. Integrates a set of pivoting arms and sector gears to maintain glass alignment throughout full travel range. Features a self-locking worm gear design that holds window position even when the engine is off., Manufacturer: GDFUOMNK