Summary
To choose an automotive LED bulb, first identify the original base and verify that the lamp is explicitly approved for the specific headlight, vehicle, and country. A mechanically compatible H7 or H11 reference alone does not guarantee a correct beam or legal road use.
How to identify the correct bulb base?
Consult the manual, the reference inscribed on the old lamp, or an application catalog. Differentiate between low beam, high beam, fog lights, turn signals, and interior lighting. The same vehicle may use several technologies depending on its trim level.
Why check vehicle-specific approval?
The light source and the optics form a single unit. Some replacement LEDs have broad approval for a bulb base type, while others are only approved for a precise list of vehicles and headlight numbers. Consult the manufacturer's documentation at the time of purchase.
What is CAN bus compatibility for?
The low power consumption of an LED can be interpreted as a burned-out bulb, triggering a warning message or flickering. A suitable module can correct this behavior, but it can sometimes generate heat. It must be secured away from sensitive plastics and cables.
What checks after installation?
Check the locking mechanism, the sealing cap, ventilation, and beam adjustment. No driver should be dazzled. To compare references dedicated to the brand's vehicles, consult our Audi LED lighting collection.