INA schaefler Aux Belt Tensioner 534007520 and belt 6pk 1020 ,PSA ford mini etc. new and unused comes with a drive belt that fits 14 and 16 hdi psa vehicles ,
Although not fitted yet, the build seems more robust than the original, particularly the arm that releases the tension. The original arm has an H section, but this one is solid, with a hole to place your 4mm locking pin through. I guess the original has a special tool to mate with the H section.