This site exists to document, in plain English, the engineering that Volkswagen Group cars share across their brands. It was prompted by a simple observation: owners of a Golf, an Octavia, a Leon or an A3 are often maintaining the same machinery without realising it, and reliable neutral information about that overlap is scattered across forums and paywalled manuals.
The site is independent. It sells nothing, takes no bookings, and has no connection to Volkswagen AG, its dealer networks, or any workshop using a similar name. Content is compiled from publicly available documentation and widely reported technical knowledge; where intervals or specifications vary by engine code and market, the text says so rather than inventing a single number.