There are two types of the seat occupancy sensor on passenger side seat on E65/E66:
– 2-wired mat (2 pin mat connector) is usually placed on E65 up to 2004/5 EU version and up to 2003 US version
– 3-wired mat (4 pin mat connector) is usually placed in models manufactured after 2005 (EU versions) and after 2003 (US versions).
To be sure about the type, please check the plug under the seat (photos of both versions are placed at the bottom of the site, below the article).