Mahlkonig EK43 Shear Plate.
A shear plate is designed to break in the event of a clog in the grind chamber. The plate breaking prevents major damage to the grinder motor- a very costly repair.
This is the most up to date OEM replacement shear plate from Mahlkonig. This new version is now made from a solid piece of brass providing the longest lasting and most reliable service life.
This specific version will fit all EK and EKK grinders that have a steel pre-breaker. The steel pre-breaker was used in first gen EK43s that have the green and red on/off buttons. If your pre-breaker is black in color, you need the gen two version, found here.
While you're opening up your grinder, consider cleaning out your machine and doing some regular maintenance.
After you've replaced your shear plate, you can take the time to align your burrs. Check out this video for a helpful how-to: