With Hyundai, you normally have to remove the light cluster and then the bulb, as opposed to accessing from the rear and leaving the lens in place.
Please remember those rear guard fog light must only be used when visibility is less that 500 meters. The number of times I have been blinded on the highway on a clear night! And in fresh snow, it is even worse!
https://www.google.com/search?q=2015+Hyundai+IX35+replace+bulbs+in+rear+fog+lights
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