Hi everyone, first time on here to post anything in forums. I have been having an issue with my smart key, ie it just stopped working, on one night it wouldn't open car or start it when I got inside. I have taken the car to the dealer close by where I live in Spain and after a few different visits and the recommended purchase of a new FOB they are now telling me that problem is not the key but with the ECU and will cost almost 1000 euro to replace. Would be grateful if anyone on here could shed some more light on this, is there any alternative to this major outlay of money to have this fixed. I can still gain access to car and start it by touching FOB off the start button. The RAV is question is a 2007, model D-CAT. 8930042021 BOX ASSY ECU is ref number for the part they said needs replacing. Thank you in advance.