This Autowave MQB AES Transponder Chip (AUTTC028) is an OE quality and specification part designed for Fiat vehicles. Transponder chips are essential components of a car key, connecting with the immobiliser system. They can be made of carbon or glass and are either integrated into the key's circuit board (On-Board) or housed separately (Off-Board). The chip functions by establishing a 'handshake' between the car key and the vehicle through an aerial located near the ignition barrel. This particular transponder chip is of the PCB type and is referenced as AES. We are a UK eBay seller since 2010 with over 10 years of experience in the automotive business, offering free expert advice and genuine UK stock. All items are shipped from the UK. We guarantee no leaks and will replace any damaged items without fuss. Free UK Mainland Shipping is provided on all listings, with express shipping options available. We also offer a 60-day returns policy for quick and efficient returns.