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                         Following the failure of the steering motor in my Nissan Micra (55 plate), I've replaced with a second hand steering motor and ecu. 
I've no problem staring the car, but 5 minutes into every journey, the red NATS light comes on. It does not affect (yet) my ability to continue driving. 
According to the mechanic who did the work, I need to get my car key re-programmed to the new ECU, which is only something that Nissan can do. 
However, Nissan say they are unable to perform the reprogramming as it's not a 'genuine' (ie new) part. 
My questions are: 
- Is it likely that the new ECU will suddenly decide not to work one day because it's not been reprogrammed? 
 - If it is, is there any way I can get the ECU reprogrammed so that I don't have to pay the £1018+VAT Nissan want for a 'genuine' part? 
                            
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