2019 Audi A6 Quattro Is Leaking Oil

Identifying the Causes of Oil Leaks in Your 2019 Audi A6 Quattro and How to Address Them Effectively

Find Repair Location
Reviewed by
Andrew Hajjar
Written by RepairPal Car Genius
Updated January 14, 2025
0%
80% chance it's the
Oil System Components
0%
20% chance it's the
Engine Gaskets
The most common reasons a 2019 Audi A6 Quattro is leaking oil are oil system component failure and leaking engine gaskets.
  • Oil System Components: A worn or damaged oil pump or filter can lead to low oil pressure, resulting in inadequate lubrication and potential engine damage.
  • Engine Gaskets: A worn or damaged engine gasket can lead to oil or coolant leaks, resulting in engine overheating or loss of lubrication.
Proper diagnosis will determine the exact cause of your symptom, saving you money on unnecessary repairs. The diagnostic experts at RepairPal Certified shops have the right tools and experience to solve any symptom.

How much does it cost to fix a 2019 Audi A6 Quattro is leaking oil?

Common Repairs

The total repair cost will vary based on the condition of your vehicle and the number of repairs needed to fix your symptom. Proper diagnosis will save you money by finding the exact repairs needed to fix your car right the first time.

Oil pans don't wear out or break like other parts, they generally only need to be replaced because of external damage from an accident or an improperly tightened drain plug. The main symptom you will experience is an oil leak underneath the engine of your car. The oil that leaks from a damaged oil pan will range from dark brown to dark black. If the leak is large enough or occurs for long enough the oil level will be low enough to turn the oil pressure or low oil level warning light on.

A bad oil level sensor may cause a false reading of the engine oil level. The oil level warning light may illuminate even when the oil level (checked manually) is within an acceptable range. The warning light may also come on and off intermittently if the sensor is faulty. An error code may be sent to the PCM and a check engine light may come on the dashboard as well if the sensor is bad.

The engine oil pressure warning light will come on if the engine oil pressure is low, or if the oil pressure sensor is faulty. In either case, engine power may be reduced significantly. The check engine light may also illuminate, and an on-board diagnostic (OBD) trouble code will be stored in the vehicle's computer.

What are the initial steps to diagnose an oil leak in a 2019 Audi A6 Quattro?

To effectively diagnose an oil leak in your 2019 Audi A6 Quattro, start by visually inspecting the engine and surrounding components for any visible signs of oil. Pay close attention to areas such as the oil pan, transmission, and gaskets, as these are common leak points. Next, check the oil levels using the dipstick; a significant drop in oil levels can indicate a leak that needs immediate attention. Don’t forget to examine the undercarriage of your vehicle for any oil spots or drips, as these can help you trace the leak's origin. Additionally, look for oil stains in the engine bay or on the ground where you typically park your car, as these can provide further clues. If you find it challenging to pinpoint the source of the leak or if the issue seems complex, it’s wise to consult a qualified mechanic who can conduct a thorough inspection and suggest appropriate repairs. Addressing an oil leak promptly is crucial to prevent potential damage to your engine and ensure the longevity of your vehicle.

What are the common causes of oil leaks in a 2019 Audi A6 Quattro?

When dealing with oil leaks in a 2019 Audi A6 Quattro, it's crucial to understand the common culprits that may be at play. One frequent issue is the degradation of the oil pan gasket, which can wear out over time, leading to noticeable leaks. Additionally, valve cover gaskets are another common source of leaks, as they can deteriorate and allow oil to escape from the top of the engine. The oil filter housing gasket is also a potential problem area; if it fails, oil can leak around the oil filter, creating a mess and potentially leading to more significant issues. Furthermore, the camshaft chain tensioner gasket can develop leaks if it becomes damaged or worn, while the rear main seal is notorious for leaking oil from the back of the engine. For DIY enthusiasts, regularly inspecting these components can help catch leaks early, allowing for timely repairs and preventing further engine damage. By staying proactive with maintenance and addressing these common issues, you can keep your Audi A6 Quattro running smoothly and efficiently.

How urgent is it to address an oil leak in a 2019 Audi A6 Quattro?

Addressing an oil leak in your 2019 Audi A6 Quattro is not just a matter of routine maintenance; it is an urgent necessity that demands immediate attention. Oil leaks can lead to a rapid loss of lubrication, which is essential for the smooth operation of your engine. Without adequate lubrication, engine components can overheat and suffer severe damage, resulting in costly repairs that could have been easily avoided. Moreover, the presence of an oil leak poses significant safety risks, including the potential for fire hazards if the leaking oil ignites upon contact with hot engine parts. Beyond the immediate risks to your vehicle and safety, neglecting an oil leak can also have detrimental effects on the environment, as spilled oil can contaminate soil and water sources. Therefore, it is crucial to diagnose and repair any oil leaks as soon as they are detected to ensure the longevity and performance of your Audi A6 Quattro while safeguarding your safety and the environment.

You’ve got options with RepairPal

Whether you need a more accurate auto repair estimate or help finding a reputable shop in your area, we’ve got you covered.