What bulb size do I need for my vehicle?

It depends on the original bulb installed, if you are not sure which bulb size fits your vehicle, please check your vehicle handbook or the part number on your original bulbs, you can also search "Automotive Bulb Guide" online.

Why doesn't it light up when I put the bulb on?

We suggest you check the fuse first. If they are good, put the spare bulbs back. If the spare bulbs lights up, we recommend installing the bulbs with decoders.

When do I need to install extra CANbus decoders?

When you turn on the light bulb, it keeps flashing,

The car's computer system kept showing an error,

The light bulb will stay on for a while even if you turn it off,

The bulb gives off a faint light and is not bright enough.