How to fix a broken heater flap on a Peugeot 407.
This problem seems to be very common on the 407, its more a question of when it will break rather than if. Dealers will want to remove the dash and most mechanics will not want to do this job. However if you set a few hours aside its something that can be done DIY. A bit messy and fiddly but it is a repair that i have now done on several 407 and it has continued to work well.
A link to the STL files so that you can 3D print the reinforcements
3D print files for the hacksaw blade holder
Facebook page for this channel if you have any questions