2020 Mazda CX-9 Is Leaking Oil

Discover the Common Causes of Oil Leaks in Your 2020 Mazda CX-9 and How to Resolve Them Effectively

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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 2020 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 2020 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 2020 Mazda CX-9?

When diagnosing an oil leak in your 2020 Mazda CX-9, it's essential to adopt a systematic approach that prioritizes simpler checks before delving into more complex diagnostics. Begin by locating the leak; this involves inspecting the area beneath your vehicle for any visible oil spots or drips, which can help pinpoint the source. Once you have a general idea of where the leak might be, turn your attention to the oil pan. Look for any signs of damage, such as cracks or loose bolts, as these can often be culprits in oil leaks. Next, check the oil filter to ensure it is securely fastened and not leaking; if it appears loose, tightening or replacing it may resolve the issue. Don’t forget to inspect the oil drain plug as well, as a loose or damaged plug can lead to significant oil loss. Additionally, examine the gaskets and seals around various engine components, as these can wear out over time and contribute to leaks. Finally, keep an eye on your oil levels; a sudden drop can indicate a more serious leak that requires immediate attention. By following these steps, you can effectively diagnose the oil leak and take the necessary actions to fix it.

What are the common causes of oil leaks in a 2020 Mazda CX-9?

When dealing with oil leaks in a 2020 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 leaks. Additionally, a worn valve cover gasket can allow oil to escape from the top of the engine, creating a mess and potentially affecting performance. Another area to inspect is the oil filter; if it is faulty or improperly installed, it can easily result in leaks. Don't overlook the oil drain plug, as a damaged or loose plug can also be a source of oil loss. Lastly, check for cracked or worn seals around engine components, such as the crankshaft and camshaft seals, as these can deteriorate and contribute to leaks. By being proactive and regularly inspecting these components, you can address oil leaks early, ensuring your Mazda CX-9 runs smoothly and efficiently.

How urgent is it to address an oil leak in a 2020 Mazda CX-9?

When dealing with an oil leak in a 2020 Mazda CX-9, understanding the urgency of the situation is crucial for any DIY enthusiast. The severity of the leak plays a significant role in determining how quickly you should act; a minor leak might seem manageable, but even small leaks can escalate into major issues if left unattended. Oil is vital for lubricating engine components, and a leak can lead to insufficient lubrication, resulting in increased friction and potential engine damage over time. Moreover, safety should be a top priority; oil leaks can create fire hazards if the oil comes into contact with hot engine parts. Therefore, addressing an oil leak promptly not only helps maintain the vehicle's performance and longevity but also mitigates safety risks. Regular maintenance and timely repairs are essential to prevent more extensive and costly repairs down the line, making it imperative to take action as soon as you notice any signs of an oil leak.

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