Short circuit problem on BMW 3 Diesel

Start by checking the fuses related to the lighting and reverse lights in the fuse box. A blown fuse could cause these issues. If the fuses are intact, inspect the wiring and connections for any signs of damage or corrosion. Let us know how it goes or if you need further assistance.

Can you clarify the location of these fuses?

(Translated from French)

The fuse box in your 2005 BMW 3 Series E90 is typically located in the glove compartment. Open the glove compartment and look for a panel on the right side that you can remove to access the fuses. There should be a diagram on the panel or in your owner's manual indicating which fuses correspond to the lighting and reverse lights. Check these fuses for any signs of damage or if they are blown. Let us know if you need more help or if you find anything unusual.