2016 Mazda CX-9 Is Leaking Oil

Discovering the Causes of Oil Leaks in Your 2016 Mazda CX-9 and How to Address Them Effectively

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Reviewed by
Bo Fader
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 2016 Mazda CX-9 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 2016 Mazda CX-9 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 the oil leak in a 2016 Mazda CX-9?

To effectively diagnose an oil leak in your 2016 Mazda CX-9, begin by locating the leak's source. Start by inspecting the area where you typically park your vehicle for any oil puddles or drips, as this can give you a general idea of where the leak might be originating. Next, check the oil level in the engine; a significant drop could indicate a leak that needs addressing. Once you have a sense of the leak's location, examine the engine components closely, focusing on areas like the valve cover gasket, oil filter, oil pan, and oil drain plug for any visible signs of oil. Pay special attention to the oil filter, as a loose or damaged filter is a common culprit for leaks. Additionally, inspect the oil pan for any dents or cracks that could be causing the issue, and ensure that the oil drain plug is securely tightened to prevent any oil from escaping. By following these steps, you can systematically narrow down the potential sources of the leak, making it easier to address the problem effectively. If you are unable to identify the leak after these checks, it may be wise to seek assistance from a professional mechanic for a more thorough evaluation.

What are the common causes of oil leaks in a 2016 Mazda CX-9?

When diagnosing oil leaks in a 2016 Mazda CX-9, 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 significant leaks. Additionally, a faulty valve cover gasket can allow oil to escape from the top of the engine, creating a mess and potential performance issues. Another area to inspect is the oil filter; if it is loose or damaged, it can result in oil leaking from the filter housing. Furthermore, cracked or damaged oil cooler lines can also contribute to leaks, particularly in the engine compartment. Lastly, various seals and gaskets throughout the engine may deteriorate with age, leading to oil seepage. Addressing these issues promptly is essential not only for maintaining engine health but also for ensuring the vehicle operates efficiently. Regular inspections and maintenance can help you catch these problems early, allowing for a DIY fix before they escalate into more significant repairs.

How urgent is it to address the oil leak in my 2016 Mazda CX-9?

When dealing with an oil leak in your 2016 Mazda CX-9, understanding the urgency of the situation is crucial for maintaining your vehicle's performance and safety. A minor leak may seem manageable, but even small amounts of oil loss can lead to significant engine wear over time, increasing the risk of costly repairs. More severe leaks can drastically reduce oil levels, resulting in inadequate lubrication, which can cause engine components to overheat and fail. Additionally, oil leaks pose safety hazards; oil dripping onto hot engine parts can ignite, and slick roads can lead to accidents. Therefore, it is essential to address any signs of an oil leak as soon as possible. Consulting a professional mechanic for a thorough inspection will help you determine the severity of the leak and the necessary steps to prevent further damage, ensuring your Mazda CX-9 remains safe and reliable on the road.

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2016 Mazda CX-9 Oil Leak Causes & Repair Options | RepairPal