Distributor crank angle sensor - question

Got a fault code 11 which is crank angle sensor fault. Distributor is only 6 months old, still under warranty. Received an e-mail from the supplier who offered me 2 ways to rectify the fault. Either I send the distributor back and they will change the crank angle sensor, or they will send me out a new crank angle sensor to fit myself. Is this possible? I thought that the crank angle sensor was not a replacable item and when it failed the whole distributor was for the bin. Is this something I could do myself? Thanks for any replies.

posted wrong forum, sorry