2018 Mazda CX-5 Is Leaking Oil

Discovering the Causes of Oil Leaks in Your 2018 Mazda CX-5 and How to Address Them Effectively

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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 2018 Mazda CX-5 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-5 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-5?

When diagnosing an oil leak in your 2018 Mazda CX-5, it's essential to adopt a systematic approach that begins with the most straightforward checks. Start by locating the leak; inspect the area where you typically park for any oil puddles or drips, as this can help pinpoint the general area of the issue. Next, check the oil level in the engine to see if it falls within the recommended range, as a significant drop may indicate a leak. Pay close attention to the oil filter and drain plug, ensuring they are secure and free from any signs of leakage. Additionally, examine the gaskets and seals around the engine, as these are common culprits for oil leaks due to wear or damage. Look for any oil stains in the engine bay, which can provide clues about the leak's source. If the leak remains elusive, consider using UV dye in the engine oil; this method allows you to trace the leak more effectively with a UV light. By following these steps, you can effectively diagnose the oil leak and determine the necessary actions to address it.

What are the common causes of oil leaks in a 2018 Mazda CX-5?

When diagnosing oil leaks in a 2018 Mazda CX-5, 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, particularly if it has become worn or compromised. Another potential source of leaks is the oil filter; if it is not installed correctly or is damaged, it can result in significant oil loss. Cracks in the oil pan itself can also lead to leaks, as can a loose or damaged drain plug, which may allow oil to escape from the oil pan. Addressing these issues promptly is vital to maintaining engine health and performance, and regular inspections can help catch these problems early, allowing DIY enthusiasts to take action before they escalate.

How urgent is it to address the oil leak in my 2018 Mazda CX-5?

Addressing an oil leak in your 2018 Mazda CX-5 is not just a matter of routine maintenance; it is an urgent issue that requires immediate attention. Oil is vital for lubricating engine components, and a leak can lead to a significant loss of oil, which may result in severe engine damage and costly repairs down the line. Moreover, the safety implications cannot be overlooked; leaking oil can drip onto hot engine parts, creating a fire hazard that endangers both the vehicle and its occupants. By delaying repairs, you risk escalating the problem, leading to more extensive damage and higher repair costs. Therefore, it is crucial to act swiftly and address any signs of an oil leak to ensure the safety and longevity of your Mazda CX-5.

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