well you need the ABS one...why wouldn't you replace it with the right one? That's why the ABS light is on... as far s being different lengths...how about the length of the shaft (solid part) was that the same? There are different one for an auto and manual...not sure if you could actually install the wrong one though. I remeber when I replaced mine (driver's sde) I couldn't find one with ABS for a manual locally...I had to order it, but the stores always stocked the other ones.
