transponder chip

hi can anyone tell me i dropped my keys the transponder chip in key cracked it keeps saying anti theft active therefore no reconising key could i purchase a fob with transponder from scrappys and transonder ring that goes with transponder chip would i be able to swap over keeping my key as it still turns can anyone give me pointers as citreon want £220 to replace and program totall rip off merchants or is there any way i can get my car started as my father is critically ill and i need car thanks for reading any advice is appreciated

Hi jammy1972

You can replace the transponder chip on its own but the new one will need programming to the car. The coil reads the information from the chip but it's the cars ECU (BSI) where the code is interpreted.

If you swapped the parts from another car you'd need to change the BSI along with the keys (or at least the transponders) and other parts, the BSI would need to be from a similar vehicle or be reprogrammed. I don't think it's worth the effort and expense.

Does your key have remote unlocking buttons and do they still work?

And do you have a spare key?

Missing Lincs wrote:You can replace the transponder chip on its own but the new one will need programming to the car. The coil reads the information from the chip but it's the cars ECU (BSI) where the code is interpreted.

Its not expensive to do just the transponder chip an auto locksmith can do this or anyone with lexia tool and a spare transponder chip. Can you see the numbering on the broken transponder chip?