Product review (5 stars): Worked But Was Not The Issue
I ordered this part for my LG DLG4971W which FYI I found is nearly identical to the DLG4871W. This part arrived, fit and worked as expected but it did not fix my issue.  I thought I would share my experience.

The overall issue was that the dryer would not heat. Without looking I ordered this part thinking it should be the issue but as soon as I took the front off and could see that the igniter would come on for about 5 seconds, shut off and repeat.  I then read a lot of articles and watched videos and found that the most common parts to fail in this case were the therma fuse, therma sensors, flame sensor, gas valve solenoids, gas valve and control board  in that order.

I found that the sensors are safely and easily tested with a volt/multimeter.  In my case they all tested good so everything was pointing to the more expensive control board or gas valve.  From there, not wanting to touch the gas valve, I ordered a control board. My model has two boards  one in front with the buttons and knobs and another one behind it with some wire connectors and circuitry.  I ordered the board with the circuitry and that fixed the issue.  ~$110