[Rovernet] 2000TC - Brake Fluid Sensor?

[James Radcliffe]

I think this is what you need:

https://www.bpnorthwest.com/jaguar/e-type/braking/brake-reservoir-cap-and-float.html

If your reservoir is rusty, you might want to replace the whole thing:
https://www.bpnorthwest.com/jaguar/e-type/braking/brake-reservoir-and-sender.html

I had the same problem. I changed mine to a girling reservoir, but that makes it hard to  get the air cleaner assembly on.

James.