I managed to remove the WUR and check but in the process this happened.
The return line was twisted and in my stupid attempt to straighten it, the line broke. Also found that one of the bolts holding the WUR was sheared. Whoever removed the WUR before clearly didn’t know their way around.
Just looking for something positive here. The inside of the WUR looks extremely clean. Maybe the mechanic I took the car to, cleaned the WUR.
I could not find the part number for the WUR return line. Looks like I am stuck till I replace this line.