I will throw my experience in on it.. I buy and sell car parts, and I prefer used items I can rebuild, I went thru 3 dccv this year early on, I did research for weeks on best approach to save some money for this item (I have already dropped 10K into a new engine for my truck,) so finances are tight.. I bought one off eBay, from this guy who is a new store owner- I paid $38 for this heater valve and think it had Bosch solenoids on it, looked new, or could've rebuilt I'm not sure nor worried. I'm going on 6 months of perfect operating A/C and heat system as well as no run hots, car will not go over 221.8 degrees ever. This unit has a 2 year warranty with labor!!!!! Haven't experienced having to use it I'm just glad its there in the event. I had to go this route, $38 every 2 years is worth a chance to take for me.. If anyone interested ill give his name, and tho I don't endorse aftermarket parts at all I have to vouch for this one and only.
Y'all might think I'm crazy but I don't have an emergency brake, I willfully got mad one night at the huge lack of console room in my gen 1, so I took the whole ebrake assembly out the cabin and disconnected it from the rear wheels, and made a custom console that holds 2 32oz drinks as well as lid for items and another storage bin for stuff like a laptop even. I don't endorse this change either but for what its worth its so nice having all the extra space.. if my service brake light comes on (doubtful on gen1) I would have a nice chuckle and carry on.