Who knows? Could be simple, could be the PO had hacked up the CAS and you have i$$ues.




Soldering in a new battery? Does this mean you car is NOT Comfort Access?


Do you have programming tools? Like being able to read modules for errors, etc? Like ISTA? Do you have access to TIS, so you can understand the components involved and how they all work?



A fob not working is a simple thing...but it sounds like you have significant issues with the modules in the car that control door locks. THAT leads me to think it isnt just 'program the fob'




I cannot tell you how many times cars are sold with significant fob/CAS issues- and the seller says "I'll knock of $200, you can get the fob anywhere"...and buyers believe it.

Sry