My friend has a neglected 2008 Jetta S 2.5 CBTA at 104K miles, which has not been modified at all. It is beginning to run roughly. He has yet to change the plugs or do a tune up.
My experience with other cars (Honda, Toyota, Ford) has taught me to use the exact same plugs as came with the car originally. I have had a real struggle trying to ascertain what came originally in his Jetta. Websites say that the original plugs could be Bosch, NGK or even Denso.
What is the model number of the original spark plugs? Any suggestions for brand/model for the other tune up parts?
az in sc