Check Engine Light On Problems of Audi S4

After engine cools down, timing chain rattle can be heard upon starting the car. Chain rattle means that plastic guides or adjusters are worn, and might go any second. Spoke with Audi rep online, which advises me that this is normal, and expected. Knowing basics of engines and transmission, I didn't believe that something is "life time" and is not serviceable, especially if it's plastic (which tends to shrink and expand depending on temperatures, and then has fractures which snaps). Two different independent licensed Audi shops confirmed that the guides and adjusters has to be replaced in order to prevent catastrophic engine failure. Chain skipping a tooth might mean bent valves, scored cylinder walls and the list goes on. What is lifetime, should be covered by Audi. If it's promised to be lifetime and needs no service, shouldn't break. If it breaks that only means design flaws, which are obvious in this engine. Yes, car isn't new, but the parts were lifetime, so I'm expecting them to last until engine is worn out, not the parts that are lifetime. If NHTSA will do full scale investigation. Will be obvious that large amount of S4's ranging from 2004 to 2007 are affected. Even 10% is large number, considered the costs of fixing what is "lifetime" according to Audi, and when it fails they leave their designs flaws for you to figure out. Hopefully justice can be brought to light as to what Audi tries to turn it's back to. Symptoms: chain rattle upon start. Chain rattle doesn't go away while driving. Check engine light, loss of power or catastrophic engine failure.

See all problems of the 2004 Audi S4 🔎.