Quote Originally Posted by cambo
Depends on how old it is I'd be replacing. Main thermo as well as egr thermo they can have effects on dpf filter
06 520d msport 73k on the clock, was heavy on juice but I put that down to a service owing to it shortly but there has been a noticeable improvement since I cleaned it, I suppose for the peace of mind best change both then may even improve economy more tho since remap am enjoying the power more and foot may have got heavier. :P