Hard to believe this is available at this price with free shipping, and from the respected Italian supplier Magneti Marelli. The design is different than the OEM part, but fits in perfectly. Most notably is the smaller motor assembly, requiring one less nut to mount. It is specifically designed for the Alfa Romeo 164 and the respective door. Minor wiring is required as you will need to scavenge the wiring pig tail and the protective sleeve from your old regulator to connect it to the supplied wires. Easy two wire connection and suggest soldering it for a secure connection. This regulator moves the window a bit more briskly, so suggest also replacing the FRONT LEFT regulator if it is still available. Also, if the front left regulator is still original, it will likely fail soon too as the non-serviceable plastic gear is a weak point. On my 164, three out of the four doors failed within the same year! I hope they will produce and offer the rear regulators here too.