Ticking/fluttering from engine bay/exhaust

There is a fluttering/ticking noise coming from my 1998 318is, it sound like its coming from the engine/front of the exhaust.
Any ideas?
Any ideas?
The Ultimate BMW E36 Forum . . . Everything you'll need to know about BMW E36 cars will be found here! Join the discussion
https://www.bmwe36blog.com/forum/