What kind of failures can I possible experience in the next 50k miles? The non-routine failures I experienced in the first 150k on a well serviced A6 have been directional signel switch and modual, front door latches driver and passenger, cv joint boots front,and front wheel bearings both sides.
Country: United StatesMake: AudiModel: A6 QuattroYear: 2002Engine: 3.0L
Hello,Thank You for choosing me with your query. Yes, I can help you. The failures you have experienced are very common and known “pattern failures”. All with the exception of the “module”, not because they don’t fail, but because I do not know which “module” you are referring to as there are at least a dozen of more.Before I list any other pattern failures I would like to be assured that you have done the timing belt service. This is scheduled to be serviced every 105k miles, though I recommend every 80k miles on this year model Audi. This service entails the replacement of the timing belt, all associated tensioners and idlers, the tension dampener, water pump, thermostat, accessory drive belt and coolant. So dependent on when the first belt service was performed (If not done, do it NOW!) the vehicle could be due for the next TB service. If the belt or any associated component driven by the belt were to fail it could cause severe ($$$) damage to the engine. Aside from the components associated with the timing belt service the engines are very reliable. The 3.0L can be a bit noisy when first started, especially after changing the oil, but I have found them as well as all other Audi engines to be very reliable if maintained. I would also suggest servicing the transmission and replacing the transmission filter as another preventative maintenance item.Other common failures aside from the maintenance items that come to mind would be; Upper control arms and outer tie rod ends, heater/AC fan makes noise @ low speeds, Electric radiator fan, Electric radiator fan control module, Transmission rear output shaft seal, hazard switch (turn signal flasher), instrument cluster center display, fuel pump @ about this mileage, and the catalytic converters (especially if “cheap” engine oil were used to maintain it). These are the main “pattern failures” that come to mind though other things do come up.Aside form the timing belt and transmission services I recommend the following preventative maintenance items; Always use premium fuel from a “top tier” source (see toptiergas.com), change the engine oil and filter every 6k miles (under “normal” driving conditions) with a synthetic engine oil that meets the VW/Audi 502 00 standard. Castrol Syntec in a 5w40 is the most readily available compliant oil in the US. Perform a major “tune” service every 40k miles, Flush the brake fluid every 2 years regardless of mileage, or at least have it tested for water content (4% or greater water content and it needs to be flushed).Those would be all the “highlights”. I hope I have answered your questions and addressed your concerns. Should you have further questions on this matter, please do not hesitate to ask. I want you to be 100% satisfied with my answer.Positive feedback, referrals and bonuses are always APPRECIATED. If you accept my answer, please don’t forget to leave feedback.Thank You!Jake “The Audi Doctor”
Over 30 years experience, 17 years with Audi, Factory trained
The module I referred to as having failed was the turn sig. flasher.
OK, that makes sense. Take that one off the list for awhile.Let me know if you have any more questions.Thank You!Jake