BMW Repair: BMW 01-330i Central locking, remote keys, hazard switch, system button

Question
FJ68435 Central Locking system button in middle console stopped working at the same time hazard lights did.  Any suggestions on what this is?  One master key works, to unlock everything, other key unlocks everything but intermittenly won't start car????  Thanks for any advice

Answer
Debbie, If only one key is intermittent then replace intermittent key at dealer usually $150 USD, Bring registration and ID. Replace central lock hazard switch. Get a hooked shaped implement or tool and yank it straight up toward the roof. Disconnect and install new switch. The old ones are usually full of soda or coffee from being positioned in front of cup holders. Switch is usually $40 USD.
-Evan