2018 Mazda CX-3 Is Leaking Oil

Identifying the Causes of Oil Leaks in Your 2018 Mazda CX-3 and How to Address 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 2018 Mazda CX-3 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 2018 Mazda CX-3 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 are the initial steps to diagnose the oil leak in a 2018 Mazda CX-3?

To effectively diagnose an oil leak in your 2018 Mazda CX-3, begin by locating the source of the leak, which often involves checking underneath the vehicle for any visible oil spots or puddles. Once you have a general idea of where the leak might be coming from, inspect the oil pan for any signs of cracks or damage, as this is a common culprit. Next, examine the oil filter to ensure it is securely installed and free from any damage, as a loose or faulty filter can lead to leaks. Don’t forget to check the oil drain plug; it should be tightly secured to prevent oil from escaping. Additionally, inspect the gaskets and seals around critical engine components, such as the valve cover and oil pan, as wear and tear can lead to leaks. Finally, monitor your oil levels regularly to assess the rate of loss, which can help you pinpoint the leak's location more accurately. By following these steps, you can systematically diagnose the issue and take the necessary actions to resolve the oil leak in your vehicle.

What are the common causes of oil leaks in a 2018 Mazda CX-3?

When dealing with oil leaks in a 2018 Mazda CX-3, 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 faulty valve cover gasket can cause oil seepage, making it another area to inspect. It's also important to check the oil filter; if it is loose or damaged, it can result in oil leaking from the engine. Physical damage to the oil pan itself can create cracks that allow oil to escape, while worn-out oil seals around various engine components can deteriorate and contribute to leaks. Addressing these issues promptly is vital to prevent further engine damage and maintain optimal vehicle performance. Regular maintenance and thorough inspections can help you catch these problems early, ensuring your Mazda CX-3 runs smoothly.

How urgent is it to address the oil leak in my 2018 Mazda CX-3?

Addressing an oil leak in your 2018 Mazda CX-3 is not just a matter of routine maintenance; it is an urgent issue that requires immediate attention. Ignoring an oil leak can lead to a significant drop in oil levels, which may result in severe engine damage and costly repairs. The risk of engine failure increases dramatically if the oil leak is not fixed promptly, potentially leaving you with the expensive option of replacing the entire engine. Additionally, oil leaks pose safety hazards, as they can create slippery surfaces that endanger you and others in your vicinity. Beyond personal safety, there are environmental concerns to consider; oil leaks can contaminate soil and water sources, leading to broader ecological damage. By addressing the leak quickly, you not only protect your vehicle's performance and longevity but also contribute to a safer and cleaner environment. Therefore, it is crucial to act swiftly to mitigate these risks and ensure the continued reliability of your Mazda CX-3.

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2018 Mazda CX-3 Leaking Oil: Causes & Repairs | RepairPal