G`day ,

i don`t know what your L322 is ? If a TD6 and the pump works for 3/4s of the tank probably not a lot wrong with the pump , seem to remember there are 2 parts/sides and the 1/4 tank part is over the hump and not picked up when that side stops working , maybe the pipe or filter that side . Just guessing .

If TD6 WFX000160 in google will give you a lot of choices or things to look at , presume your after experience with other than factory , all i can suggest is if it , the blurb say OEM it`s less of a risk .

Cheers