Jimbo56

Hi All, I purchased a spare transponder from E-Bay. https://www.ebay.co.uk/itm/384798212269 I have had the key programmed, however the transponder doesn't want to pair up using the `Switch to position 2, 4 times method' I opened up and have attached the image showing spare chip on left and my existing chip on the right. They are different to the eye, however it may be that the one I purchased is more modern? Can anyone help with this? TIA Jim