2020 Toyota 4Runner Is Leaking Oil

Troubleshooting Oil Leak Sources in Your 2020 Toyota 4Runner and How to Fix Them

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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 2020 Toyota 4Runner 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 2020 Toyota 4Runner 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.

What steps should I take to diagnose the oil leak in my 2020 Toyota 4Runner?

When diagnosing an oil leak in your 2020 Toyota 4Runner, it's essential to adopt a systematic approach that begins with the most straightforward checks before progressing to more complex diagnostics. Start by locating the leak; inspect underneath the vehicle for any visible oil drips or stains on the engine and surrounding components. Next, check the oil level to determine if it is consistently low, which could indicate a leak. Pay close attention to the oil filter and drain plug, ensuring they are secure and free from damage. Additionally, examine the gaskets and seals, such as the valve cover and oil pan gaskets, as wear and tear can lead to leaks. If the source remains elusive, consider using UV dye in the engine oil, which can help illuminate the leak under UV light. For a more thorough investigation, a pressure test of the oil system can reveal hidden leaks. If these steps do not yield results or if you feel uncertain, consulting a qualified mechanic is advisable, as they possess the expertise and tools necessary for accurate diagnosis and repair. By following this structured diagnostic approach, you can effectively identify and address the oil leak in your vehicle.

What are the common causes of oil leaks in a 2020 Toyota 4Runner?

When diagnosing oil leaks in a 2020 Toyota 4Runner, it's crucial to understand the common culprits that may be at play. One frequent issue is the oil pan gasket, which can wear out over time, leading to leaks that can be easily spotted under the vehicle. Another area to inspect is the valve cover gasket; as it ages, it may lose its sealing ability, resulting in oil seeping out. Additionally, the oil filter should be checked, as improper installation or damage can cause leaks from this component. The rear main seal is another potential source of oil leaks, often due to wear and tear, and can be more challenging to access. Lastly, don't overlook the oil cooler lines, which can corrode or sustain damage, leading to oil escaping from these connections. By being aware of these common issues, DIYers can effectively troubleshoot and address oil leaks, ensuring their 4Runner remains in optimal condition. Regular inspections and maintenance are key to catching these problems early and preventing further engine damage.

How urgent is it to address the oil leak in my 2020 Toyota 4Runner?

Addressing an oil leak in your 2020 Toyota 4Runner is not just a matter of routine maintenance; it is a pressing issue that requires immediate attention. An oil leak can lead to insufficient lubrication of the engine, which increases friction and can cause severe damage to engine components over time. This not only jeopardizes the performance of your vehicle but can also lead to costly repairs. Furthermore, as oil levels drop due to a leak, the risk of engine overheating escalates, potentially resulting in catastrophic engine failure. Beyond mechanical concerns, an oil leak poses significant safety hazards; oil can drip onto hot engine parts, creating a fire risk that endangers both the vehicle and its occupants. Therefore, it is crucial to prioritize the repair of any oil leaks to safeguard your vehicle's integrity and ensure your safety on the road.

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2020 Toyota 4Runner Oil Leak Causes & Repair Costs