This mechanical belt tensioner is designed for use with BMW 1 and 3 series vehicles, including E70, E81, E84, E87, E90, and E92 models. The tensioner is manufactured by BMW (Genuine OE) and has a part number of 11287800333, with additional reference OE/OEM numbers of 7800333 and 11287800333. It is a high-quality component that will help to keep your engine running smoothly.

This tensioner is ideal for those looking to replace a worn or damaged part on their BMW vehicle. It is compatible with a range of different engines and is easy to install. Whether you are a professional mechanic or a DIY enthusiast, this tensioner is a great choice for keeping your BMW running smoothly.