2021 Mazda 6 Is Leaking Oil

Diagnosing Oil Leak Sources in Your 2021 Mazda 6 and Effective Repair Strategies

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Reviewed by
Aisha
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 2021 Mazda 6 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 2021 Mazda 6 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.

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 steps should I take to diagnose the oil leak in my 2021 Mazda 6?

To effectively diagnose an oil leak in your 2021 Mazda 6, begin with a systematic approach that prioritizes simpler methods before advancing to more complex diagnostics. Start by parking your vehicle on a level surface and placing a large piece of cardboard beneath the engine overnight. This will help you pinpoint the leak's location by revealing oil spots on the cardboard. Next, check the oil level in the engine; a significantly low level may indicate a leak, and examining the oil's color and consistency can provide additional clues. Inspect the engine for visible signs of oil leaks, focusing on areas like the oil filter, oil pan, and valve cover gasket. If the source remains elusive, consider adding UV dye to the engine oil, which can be detected with a UV light after driving. For a more thorough investigation, a pressure test can be performed to identify leaks in the oil system. If these methods do not yield results, consulting a professional mechanic is advisable, as they possess the expertise and tools necessary for a comprehensive diagnosis and repair. By following this structured approach, you can efficiently identify and address the oil leak in your vehicle.

What are the common causes of oil leaks in a 2021 Mazda 6?

When dealing with oil leaks in a 2021 Mazda 6, it's crucial to understand the common culprits that may be at play. One frequent issue is a degraded or damaged oil pan gasket, which can wear out over time and lead to leaks. Similarly, the valve cover gasket can deteriorate, causing oil to seep from the top of the engine. Another potential source of leaks is a faulty oil filter or its housing gasket; if these components are not sealed properly, oil can escape. Additionally, damaged oil cooler lines can contribute to leaks, as can a loose or damaged drain plug, which may allow oil to leak from the oil pan. Addressing these issues promptly is vital to maintaining engine health and performance, and regular inspections can help you catch these problems early, ensuring your Mazda 6 runs smoothly.

How urgent is it to address the oil leak in my 2021 Mazda 6?

Addressing an oil leak in your 2021 Mazda 6 is not just a matter of routine maintenance; it is a pressing concern that requires immediate attention. An oil leak can lead to insufficient lubrication of engine components, increasing the risk of friction and overheating, which can ultimately result in severe engine damage. Moreover, a significant loss of oil can cause your engine to operate below optimal levels, potentially leading to catastrophic failure if left unchecked. The safety implications are equally alarming, as leaking oil can drip onto hot engine parts, creating a fire hazard. Additionally, ignoring this issue can escalate into more extensive and costly repairs, making it crucial to act swiftly. By addressing the oil leak promptly, you not only safeguard your vehicle's performance and longevity but also protect yourself and others from potential safety risks.

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2021 Mazda 6 Leaking Oil: Causes & Repair Costs | RepairPal