This is a tuning box I purchased for my T4 which I never used as I sold the van . It did come with a uprated sensor which I did use and was fine so I have no doubt that this is good as well. My old sensor is included as I don't need it. I have no instructions it comes as is. It is adjustable with a adjuster screw in the side of it as can be seen in the photo. Its for a 2.5 D 88 bhp model mine was a 2001. I'm just going to list it for a tenner with free post as I don't need it. Couldn't find the free post offer so it says collection only but I will post.