hi,got a t4 2.5tdi transporter,anybody no anything about the injectors? i have a set of replacment injectors genuine vw bosch ones, four std ones look the same,but the electronic one looks longer.have been told by supplyer they are interchangable.on my van the electronic one is on no4 cyl,this one looks like it fits on no5, does it make any differance witch cyl the electronic one go's in?