transmission Gone bad
Not bad in replace, but repairable. Maybe just the reverse solenoid is faulty. The trans need to be diagnosed by a trans shop or independent BMW shop to verify.
I have an 06 760i. I used to downshift with the paddles when I came over a large bridge to my area. I wore out the 4th and 5th gear friction plates and then the care would not go into gear. BMW wanted $10k to repair. I got it done in Los Angeles for $5000. The entire valve body has to be replaced and it retails from BMW for $3000+.
Looking for a Used 7 Series in your area?
CarGurus has 5,736 nationwide 7 Series listings starting at $3,299.
Search BMW 7 Series Questions
Are you a UK consumer? CarGurus now has a discussion forum in the UK.
BMW 7 Series Experts