GGZoneZL ZR L Left Button Key Flex Cable Replacement for Nintendo Switch NS Joy con Repair Part (ZL)

It does work, however the force needed to press the button is far too high, meaning it's much stiffer than the stock trigger and makes a much louder click sound. Not entirely practical for games where you would need to press the button quickly and therefore not a great replacement.

Perfect replacement product

Works perfectly. Used this to replace the ZR button I accidentally broke whilst replacing my Joy Con Shells.Speaking of which, words of advice:- Accidentally knocking the tiny button off of the connector is incredibly easy to do if you apply too much force when reconnecting the triggers to align with the springs. Apply vertical pressure only, do not apply the trigger with a slide and click motion as you will more than likely break the button clean off. (And your springs will not align this way, and will likely bend, making them less springy resulting in a harder trigger press);- When uncoupling your ribbons, remember that they are held in their connectors with a clip. Use a spudger tool to unlock the clip, and then use your fingers to pull the ribbon free. Do NOT use tweezers, you can very easily tear the ribbon with them;- If you are unsure of any of the above, there are plenty of Joy Con deconstruction / repair videos on YouTube, spend time watching those so you know what you're in for (Though chances are, if you need this part, it's probably because you broke it whilst taking everything apart in the first place!)