On older Peugeot 206 3-door models, you have to lower the backrest to sit in the rear seats. The seat then moves forward. When the backrest is raised and the seat pulled back, it returns to its initial position, thanks to a mechanical position memory. Occasionally, this part breaks and the seat can no longer be locked onto the rail. To solve this problem, the mechanical position memory must be replaced. This is what I've done, and what I'm sharing with the community. This metal part was used to repair the mechanical position memory on a Peugeot 206 3-door seat. It may be necessary to adjust the part slightly with a file to adapt it to its support, but it's not complicated. 3D printing preferably in steel-type metal