Product review (3 stars): Doesn't fit model LDF7551ST
LDF7551ST owners be warned : this does NOT fit.  It appears to fit and looks identical but the drain line is about 3 feet too long.  This causes the drain line to loop and results in an "OE" or drain error.  This is because the drain line is too long and the drain pump cannot sufficiently push the water out of the line due to the length and pressure in the line.  LG gave me this part number when I called and Amazon said it would fit as well.  I've since learned there are three versions of this drain line, almost identical but each ending in a different digit which I assume indicates length of the line.  I ultimately repaired my old line with some gorilla glue and a universal coupling; hopefully it holds as I've purchased two different versions of this line and both were wrong.