Nissan Pathfinder Is Leaking Oil

Common Causes of Oil Leaks in Your Nissan Pathfinder and How to Fix Them

Find Repair Location
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 Nissan Pathfinder 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 Nissan Pathfinder 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.

An oil leak may be noted on the ground where the vehicle is parked. However, many vehicles have plastic trays underneath the engine that may catch leaking oil and conceal the leak. In such cases, a low oil level, a burning oil smell, or even smoke from oil burning in the engine bay may be noted.

»MORE: Signs of a bad oil pan gasket

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.

Troubleshooting Oil Leaks in a Nissan Pathfinder

When troubleshooting oil leaks in your Nissan Pathfinder, it's essential to adopt a methodical diagnostic approach. Begin by locating the source of the leak; this involves checking under the vehicle for any visible oil puddles or drips, as well as inspecting the engine bay for any signs of oil residue. Once you have a general idea of where the leak might be coming from, check the oil level to ensure it is within the recommended range, as a significant drop could indicate a more serious issue. Next, examine the gaskets and seals, particularly the valve cover and oil pan gaskets, for any signs of wear or damage, as these are common culprits for leaks. Don’t forget to inspect the oil filter and drain plug for tightness, as a loose connection can lead to oil escaping. Additionally, the oil pressure switch and oil cooler lines should be checked for any signs of seepage or damage. If these initial checks do not reveal the source of the leak, it may be time to consult a mechanic for a professional diagnosis. By following this structured approach, you can effectively identify and address oil leaks, ensuring your Pathfinder remains in optimal condition.

How to Diagnose and Fix Oil Leaks in a Nissan Pathfinder?

When tackling oil leaks in a Nissan Pathfinder, it's essential to understand the common problems that can arise within the engine's oil system. One frequent issue is the deterioration of gaskets, particularly the valve cover and oil pan gaskets, which can lead to noticeable leaks. Additionally, seals such as the cam seals and crankshaft seals may wear out over time, contributing to oil loss. It's also important to consider the oil filter housing, as a faulty gasket here can result in significant leaks. Regularly checking for oil spots on the ground or smoke from the engine can help you identify these issues early. If you notice any signs of leakage, inspecting the oil pan bolts for looseness or corrosion is a good next step, as this can often be a simple fix. By being aware of these common problems, you can more effectively diagnose and address oil leaks, ensuring your Pathfinder remains in optimal condition.

Why is it Critical to Address Oil Leaks in a Nissan Pathfinder?

Addressing oil leaks in a Nissan Pathfinder is not just a matter of routine maintenance; it is a critical step in ensuring the vehicle's safety and longevity. Ignoring even minor oil leaks can escalate into major engine problems, leading to costly repairs or, in the worst-case scenario, complete engine failure. The oil in your engine plays a vital role in lubricating moving parts, and any loss of this essential fluid can compromise performance, resulting in decreased efficiency and increased wear and tear. Moreover, oil leaks pose significant environmental risks, as they can contaminate soil and water sources, contributing to pollution. From a safety perspective, oil leaks can create hazardous driving conditions, increasing the likelihood of accidents due to slippery surfaces. Therefore, it is imperative to address any signs of oil leaks promptly to safeguard your vehicle's performance, protect the environment, and ensure the safety of everyone on the road.

You’ve got options with RepairPal

Whether you need a more accurate auto repair estimate or help finding a reputable shop in your area, we’ve got you covered.