Audi A4 Quattro recurring issue with component malfunction leading to frequent error notifications on Audi A4 Quattro

Some Audi A4 Quattro owners report experiencing excessive oil consumption, particularly with the 2.0-liter four-cylinder engine, often due to failed crankshaft seals and rear main seals that lead to significant oil loss. Additionally, owners of certain models from 2006 to 2017 have reported issues with carbon buildup in the intake system, which can cause power loss, rough idling, decreased fuel economy, and illuminated check engine lights. Transmission leaks have also been a notable concern for the 2017 Audi A4, with repair costs averaging around $1,000. Furthermore, problems with the thermostat housing and water pump leaking have been reported in the same model year, necessitating prompt attention to avoid further damage. Convertible Audi A4 owners have documented issues such as roof problems, hydraulic pump motor failures, hydraulic leaks, wiring issues, and frame position sensor faults. These recurring malfunctions can trigger error notifications and affect the vehicle's performance and reliability, making regular maintenance and timely repairs crucial for smooth operation.