Hi guys was in nissan yesterday for a 40000k service and was told that there is new softwear for the nissan d22 2.5cr to get rid of the excess black smoke that theses things blow. I know that they are ment to blow smoke it's just part of being diesel but I don't believe that they should blow as much as they do. They have no intentions of updating this for you unless u complain about it as they have no plans to make this a recall as they would look like a bunch of cock heads after all the complaining I have seen about this over the last couple of years. I'm not sure if it will work but I'm booked in for Wednesday week to have it done and will let u know if it helps