this is a common issue and is a failure of the electronic steering lock that is integrated into your steering column.
in some cases a software update and new battery can resolve this, which would cost around £300- £400
more likely, the steering column will need to be replaced, which will cost more like £1200-£1400
this will need to be done at a main dealer or very high end / well equipped BMW specialist garage. A generalist garage cannot rectify this.
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thankyou for your reply steve, i have been driving the car for a couple of weeks now with this light on and it hasn,t felt any different to drive than before the light was there is this normal or will the car suddenly get worse if not fixed? please reply and soon as get message i will rate you good. thankyou
you may end up unable to steer or even start the car if it gets worse. Get it fixed asap