One problem related to crankcase (pcv) has been reported for the 2018 Audi A4. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2018 Audi A4 based on all problems reported for the 2018 A4.
The engine oil level has been gradually dropping and has required monitoring and/or adding oil between normal service intervals. The exact source is unknown. It may involve abnormal oil consumption, an external oil leak, internal engine oil consumption, pcv/oil separator issue, turbo-related oil consumption, gasket/seal issue, or oil loss that is not leaving an obvious visible puddle. This is being reported as a safety concern because low engine oil or abnormal oil loss can lead to low oil pressure, warning messages, engine overheating or damage, smoke, oil contacting hot engine/exhaust components, limp mode, stalling, or loss of propulsion while driving. The issue should be inspected rather than treated as normal maintenance unless a proper diagnosis confirms normal operation. No crash, fire, injury, or fatality occurred. The vehicle/component is available for inspection, and oil-level/refill records, repair records, photos, receipts, and service communications are available if requested.
| Engine And Engine Cooling problems | |
| Crankcase (pcv) problems | |
| Engine Belts And Pulleys problems |