2018 Kia Niro Is Leaking Oil

Identifying the Causes of Oil Leaks in Your 2018 Kia Niro 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 2018 Kia Niro 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 Kia Niro 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 steps to diagnose the oil leak in a 2018 Kia Niro?

To effectively diagnose an oil leak in your 2018 Kia Niro, begin with a systematic approach that prioritizes simplicity before delving into more complex diagnostics. Start by locating the leak; inspect the area beneath your vehicle for any visible oil drips or pooling, and check for oil stains on the engine and surrounding components. Next, verify the oil level in the engine, as a significantly low level can indicate a leak. Pay close attention to the oil filter and drain plug, ensuring they are secure and free from leaks. Additionally, inspect the gaskets and seals around engine components for any signs of wear or damage that could be contributing to the leak. If the source remains elusive, consider performing a pressure test, which can help identify leaks that are not immediately visible. Should you find the process overwhelming or the issue complex, consulting a qualified mechanic is advisable for a thorough inspection and professional diagnosis. This methodical approach not only aids in identifying the leak but also ensures that you address the issue efficiently and effectively.

What are the common causes of oil leaks in a 2018 Kia Niro?

When diagnosing oil leaks in a 2018 Kia Niro, 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 oil filter can also be a source of oil leakage, as it may not create a proper seal. Another area to inspect is the drain plug; if it is loose or damaged, it can allow oil to escape from the oil pan. The valve cover gasket is another component that can deteriorate with age, resulting in leaks around the valve cover. Lastly, a cracked or damaged oil cooler can contribute to oil leaks as well. Addressing these issues promptly is essential to prevent further engine damage and maintain your vehicle's performance. Regular inspections and maintenance can help you catch these problems early, ensuring a smoother and more reliable driving experience.

How urgent is it to address the oil leak in my 2018 Kia Niro?

Addressing an oil leak in your 2018 Kia Niro 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 that could compromise the vehicle's performance and longevity. Therefore, it is crucial to act swiftly and address any signs of an oil leak to ensure the safety, efficiency, and durability of your Kia Niro.

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