To find the White Latex Car Key in Dead Island 2 Haus DLC, beat the DLC then return to the room with Vincent and Veronique.
There you’ll find the Final Candidate, a Screamer!
Take them out then make sure to loot the White Latex Car Key. Now that you have the key, exit the Haus to reach the area where all the black vehicles are parked.
Use the key to unlock one of the trunks!
You’ll receive the Kill-O-Wait Kick Slayer Card and some cash. For more guides on the Haus DLC for Dead Island 2, click here!