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Q:

no radio,no navigation,no illumination on either,could secrurity system cause on 2001 BMW 740iL

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
this problem
(3) Answers
Your anti-theft system could cause the problem if it thinks it's in theft mode but sounds more like your battery to me or like the guy above me said your dashboard accessory fuse could have blown which is a cheap simple fix. Does the car start?