Yep, they’re a bit of a pain but doable. ( if it’s the same as a 2009 one, which I think they are) Once you’ve took the unit off, ( unscrew the two holding screws,it pulls out, just disconnect the wiring block) the two pieces are held together with sealant, you have to carefully use a Stanley knife and prise it apart. I bought an LED strip bulb off fleabay and fitted that, you can either solder it or just splice the wires together with insulation tape. Putting it back together is easy enough, just buy a tube of bathroom sealer.