Quote Originally Posted by gn3dr
Has anyone here had trouble with the DISA valve in the intake manifold? It's the one that switched inlet tract length. What are the failure symptoms you have seen if you have.
Any idea if they are only available from BMW?
Is the e46 one the same as the e36?
I think I have one of these still attached to the manifold somewhere in the shed.

Can have a look for you this eve?