It was intraduced in 1978. Read more at http://www.edmunds.com/bmw/7series/review.html
BMW series are the type of sedans that they have. 1 series, 3 series, 4 series, 5 series, 7series
If the 2001 7series bmw's are similar to the 1998 7series, it's located between the driver side headlamp and the power steering reservoir in the engine compartment. Of course it's cylinder shaped and you can't miss it.
The height of the 2007 BMW Z4 is 4 ft. 3.1 in. (51.1 in.).
The height of the 2007 BMW X3 is 5 ft. 6 in. (66 in.).
The height of the 2007 BMW M5 is 4 ft. 9.8 in. (57.8 in.).
The height of the 2007 BMW X5 is 5 ft. 9.5 in. (69.5 in.).
The height of the 2007 BMW M6 is 4 ft. 6 in. (54 in.).
The height of the 2007 BMW 3-Series is 4 ft. 7.9 in. (55.9 in.).
The height of the 2007 BMW 6-Series is 4 ft. 6.1 in. (54.1 in.).
The height of the 2007 BMW Alpina-B7 is 4 ft. 10.1 in. (58.1 in.).
The height of the 2007 BMW 5-Series is 4 ft. 9.8 in. (57.8 in.).