One problem related to crankcase (pcv) has been reported for the 2018 Audi S4. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2018 Audi S4 based on all problems reported for the 2018 S4.
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.
| Engine And Engine Cooling problems | |
| Crankcase (pcv) problems |