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 2014 BMW X6 is 16 ft. 0 in. (192 in.) long.
The 2014 BMW Z4 is 13 ft. 11 in. (167 in.) long.
The 2014 BMW M6 is 16 ft. 0.8 in. (192.8 in.) long.
The 2014 BMW X5 is 16 ft. 1.2 in. (193.2 in.) long.
The 2014 BMW X1 is 14 ft. 8.5 in. (176.5 in.) long.
The 2014 BMW M5 is 16 ft. 1.5 in. (193.5 in.) long.
The 2014 BMW X3 is 15 ft. 3 in. (183 in.) long.
The 2014 BMW Alpina-B7 is 16 ft. 8.5 in. (200.5 in.) long.
The 2014 BMW 3-Series is 15 ft. 2.5 in. (182.5 in.) long.