When your car window stops working, it's usually smarter to replace both the motor AND regulator together - that's exactly what this Cardone Select assembly does. The gears are made from stronger material than original equipment to prevent stripping and breakage. Every motor gets 100% load testing before shipping, so you know it'll work right out of the box. They use precisely designed brushes and the perfect amount of lubricant for quiet operation and long life. What's really smart is these have extra torque motors to handle situations where the regulator might not be perfectly lubricated. Installation is straightforward if you're handy, or any mechanic can swap it in quickly. Beats trying to figure out which part failed and making multiple repairs. Cardone has been making quality automotive parts for years, and this assembly meets or exceeds OEM specs. Definitely the way to go for a permanent fix to window problems instead of just replacing one component!