Ever wonder what actually makes your window go up or down in your vehicle? It's the window regulator. In order to make the window go up or down the regulator has several moving parts that operate together to achieve the desired function. As with anything these moving parts eventually wear out and need to be replaced. Are you finding it difficult to roll your windows up or down? If so, chances are you need to replace your regulator. BBR window regulators are a quality replacement at a great price.