A place for more technical discussions. Please make sure you post in the correct section on the site, this way it keeps the site tidy AND ensures you get a more relevant answer.
I did the same mistake. The crankshaft sensor seems to be well hidden under the alternator and it's just plastic. £35 on Amazon. In my case, I didn't need to unscrew the hexagonal bottom bolt, just the two upper ones and used some force to move the alternator.