I'm looking to do the same as one of my license plate lights is burnt out in my 2015. How do they look?
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Philips changed the base of the bulb design recently. If you get the silver/blue 921, it fits almost perfect. The new design has a thicker base that you may need to lightly sand down to get it to fit properly. No need for a sanding tool as it's only a small bit, just some sand paper and elbow grease.
I may look into diode dynamics next time personally if they don't require any altercations like the new Philips bulbs. Just laziness on my part tbh.