While you wait for answers, we may have found some information which could help you.
Click here for Oven Stays TurnedBosch oven door - HBN331.2B – Hinge Snap?
How to remove the fittings to a Bosch light bulb oven?
fix oven cover?
bosch ovenHBA13B1.OB bulb cover?
Can't get Bosch oven door back on after cleaning?
Bosch Oven Bulb Failure?