2015 Subaru Legacy Is Leaking Oil

Discovering the Causes of Oil Leaks in Your 2015 Subaru Legacy and How to Fix 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 2015 Subaru Legacy 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 2015 Subaru Legacy 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.

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 steps should I take to diagnose the oil leak in my 2015 Subaru Legacy?

To effectively diagnose an oil leak in your 2015 Subaru Legacy, start with a thorough visual inspection of the vehicle. Look for any signs of oil spots on the ground or stains under the engine, particularly after the car has been parked for a while. Common leak points include the valve cover gaskets, crank seal, and the areas around the oil filter and timing case assembly. If you notice loose valve cover bolts, tightening them may resolve the issue, but if the leak persists, consider replacing the gasket. Utilize diagnostic tools such as placing a cookie sheet or cardboard under the car to catch drips, which can help pinpoint the leak's source. Additionally, check for oil consumption issues by inspecting the coolant reservoir for oil contamination or observing blue smoke from the exhaust, as these could indicate more serious engine problems. If the leak remains elusive or if you encounter complex issues, consulting a professional Subaru mechanic is advisable, as they can provide a more in-depth inspection and repair guidance tailored to your vehicle's specific needs.

What are the common causes of oil leaks in a 2015 Subaru Legacy?

When dealing with oil leaks in a 2015 Subaru Legacy, it's essential to understand the common culprits that may be affecting your vehicle. The timing chain cover is a frequent source of leaks, often due to the failure of its sealant-type gasket, which can lead to costly repairs if not addressed promptly. Another area to inspect is the valve cover gasket, which can deteriorate over time or become loose, resulting in oil seeping out. Additionally, camshaft seals, particularly the older black versions, may leak as they age, making them a critical point to check. Don't overlook the oil cooler and oil pan, as these components can also develop leaks from failing O-rings or gaskets. Lastly, consider inspecting the piston access plugs and crank seal, as these areas, while less common, can still contribute to oil leaks. Regular maintenance and thorough inspections are vital to catch these issues early, helping to prevent more severe engine damage down the line.

How urgent is it to address the oil leak in my 2015 Subaru Legacy?

Addressing an oil leak in your 2015 Subaru Legacy is not just a matter of routine maintenance; it is an urgent issue that demands immediate attention. Ignoring an oil leak can lead to severe engine damage, as the lack of proper lubrication can cause engine components to wear down rapidly, potentially resulting in catastrophic failures that could leave you with a hefty repair bill. The longer you delay repairs, the more extensive the damage can become, escalating costs significantly. Moreover, driving with an oil leak poses serious safety risks, as low oil levels can lead to engine overheating or seizing, increasing the likelihood of accidents or breakdowns. Common leak points in Subaru engines, such as the valve cover gasket and oil pan gasket, should be inspected and repaired promptly to prevent further complications. While temporary solutions may seem appealing, they are not substitutes for professional diagnosis and repair. Therefore, it is crucial to prioritize addressing the oil leak to ensure the safety, reliability, and longevity of your vehicle.

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2015 Subaru Legacy Leaking Oil: Causes & Repair Options