I have a 2003 X5 4.4 that just started leaking oil from the front. I put some dye in the engine oil and found the leaks are the engine oil, not the PS fluid, and are coming from above the power steering pump. The oil lines from the oil filter canister that are visible from above are all dry. The source of the actual leaks are hidden but I am guessing it is where the oil lines return to the engine. I found a schematic and there are O-rings sealing the lines and they are under pressure so makes sense they would leak after 17 years and lots of engine heat.

Question: Has anyone replaced the lines or O-Rings? Looks like I just need to remove the splash shield and remove the Power Steering pump and then I could have access to the lines and replace the O-Rings. But before I start pulling the power steering, I was curious if anyone else had do this before and if removing the splash shield and PS pump would give me sufficient access or is there more to it?

There is no way to visibly check the ends of these lines to confirm that is the leak. They vanish into the abyss so asking before I start wrenching.