Unlike other headlight bulbs, to install an H7 LED bulb, you have to remove the collar/ring before locking the bulb into the place.
Here are the steps:
The above installation steps can be applied to most vehicles. However, for many Volkswagen/Mercedes Benz/Hyundai vehicles, the headlight bulbs are held in place with an extra adapter. Please check here to see different adapters/retainers.
This is a metal adapter on Volkswagen Jetta 2012
The stock adapter can’t work with the LED bulb, so to swap your halogen bulb to LED, you’ll need an aftermarket adapter.
Here is the adapter for Volkswagen Jetta 2012, and the product link in case you’re interested in.
Actually, there are so many different adapters for H7, if your factory halogen bulb H7 also comes with an adapter, and it is not the same as the above one, please contact us to get professional support before placing your order.