There are 3 stored owner reports matching the engine leading-label group for the 2018 Audi S4 in our NHTSA-sourced dataset. These are unverified consumer reports and may not reflect confirmed defects.
This group counts stored reports whose component label starts with one of this site's matching prefixes, ignoring case. Each matching report counts once within the group. Components mentioned later in the label or only in the narrative are not searched. How component counts work
Loaded 3 of 3 matching reports.
Open the full vehicle complaint log (all categories)Water pump defect for the 3.0L ea839 turbo engine found across many Porsche and Audi models. Defect causes damage to vacuum lines, thermostat, and can eventually lead to engine failure if not resolved. No way of knowing this is happening until you start to lose coolant (which will throw an engine code), but by that point the damage is done. There was a recall for the previous generation vehicle water pumps.
My 2018 Audi S4 has a catastrophic engine failure issue and this is common with the EA839 engine. There is a knocking in the motor that is caused by internal engine parts (rocker arms needle bearings) becoming loose and dislodged. The metal shavings travel in the motor oil and destroy the engine from the inside. Hendrick Audi northlake examined the car on February 26, and recommended a new engine be installed at a cost of $32,000. I contacted Audi customer care and they reviewed the case only to offer me no assistance with the new engine expense. My Audi S4 is a 2018 with less than 47k miles, and I am the fifth owner. I have been reading a lot of threads on Audi forums as well as Reddit about this problem, and this is not rare. This should be a class action lawsuit against Audi for making and selling a defective product. The EA839 engine from 2017 to 2020 is a ticking bomb from day one, almost engineered to fail prematurely. And Audi does nothing to remedy the problem. That is why I would like for NHTSA to get involved in this situation. Please look into this and let me know what I can do to assist with this. I can be reached at [XXX] or [XXX] . Thank you!! INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
PCV housing and lines failed. Caused pressure to build up thus shooting off the oil cap shooting oil everywhere! in addition to that it is a huge fire hazard considering the turbo is right next to it.
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
NHTSA source checks for this vehicle year
Checks are recorded separately for each dataset, not for the whole page. Dates use UTC. A missing check date does not mean no records exist.
Vehicle import recorded: Apr 28, 2026. This is the stored import date, not confirmation that every source was successfully refreshed.