Where do you stick the beam deflectors on a BMW Series 3 headlamps?

On a BMW Series 3, beam deflectors are typically applied to the headlamp lenses to adjust the light beam for driving in countries with different regulations, such as when driving on the opposite side of the road. You should place the deflectors on the outer edge of the headlamp lens, ensuring they align correctly with the beam pattern. It's essential to follow the specific instructions provided with the deflectors for optimal placement and to ensure compliance with local regulations.