2023 Toyota Highlander Is Leaking Oil

Common Causes of Oil Leaks in Your 2023 Toyota Highlander and How to Address 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 2023 Toyota Highlander 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 2023 Toyota Highlander 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.

A bad oil level sensor may cause a false reading of the engine oil level. The oil level warning light may illuminate even when the oil level (checked manually) is within an acceptable range. The warning light may also come on and off intermittently if the sensor is faulty. An error code may be sent to the PCM and a check engine light may come on the dashboard as well if the sensor is bad.

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 2023 Toyota Highlander?

To effectively diagnose an oil leak in your 2023 Toyota Highlander, start by locating the source of the leak. Begin by inspecting the area beneath the vehicle for any visible oil spots or puddles, as this can give you a clue about where the leak is originating. Once you have a general idea, examine the oil pan closely for any signs of cracks, damage, or loose bolts, as these are common culprits for leaks. Next, check the oil filter to ensure it is properly installed and free from any leaks, as a faulty filter can also contribute to oil loss. Don’t forget to inspect the oil drain plug; it should be securely tightened to prevent any oil from escaping. Additionally, take a moment to look at the gaskets and seals within the engine, as wear and tear in these components can lead to leaks. Finally, keep an eye on your oil levels over time to gauge the severity of the leak and assist in pinpointing its location. By following these steps, you can systematically diagnose the issue and take the necessary actions to address the oil leak effectively.

What are the common causes of oil leaks in a 2023 Toyota Highlander?

When diagnosing oil leaks in a 2023 Toyota Highlander, it's crucial to understand the common problems that may arise. One frequent issue is a degraded or damaged oil pan gasket, which can lead to oil seepage as it deteriorates over time. Additionally, worn-out oil seals, often affected by heat and friction, can contribute to leaks, particularly in the engine area. Another potential source of oil leaks is a loose or damaged oil filter; if the filter is not securely attached or has sustained damage, it can allow oil to escape from the filter housing. Furthermore, a faulty valve cover gasket can result in oil leaking from the top of the engine, as it is responsible for sealing the valve cover. Lastly, cracks in engine components, such as the engine block, can also lead to significant oil leaks. Addressing these issues promptly is essential to maintain your vehicle's performance and prevent further damage, making regular inspections and maintenance vital for any DIY enthusiast.

How urgent is it to address the oil leak in my 2023 Toyota Highlander?

Addressing an oil leak in your 2023 Toyota Highlander is not just a matter of routine maintenance; it is a pressing issue that requires immediate attention. An oil leak can lead to a significant loss of engine oil, which is essential for lubricating the moving parts of your engine. Without adequate lubrication, these components can suffer from increased friction, leading to severe engine damage over time. Additionally, neglecting an oil leak can compromise your vehicle's performance, resulting in decreased fuel efficiency and increased operational costs. The safety implications are equally concerning, as leaking oil can drip onto hot engine parts, creating a fire hazard. Furthermore, postponing repairs can escalate the problem, leading to more extensive and costly repairs down the line. Therefore, it is crucial to act swiftly and address any signs of an oil leak to maintain the integrity and safety of your Highlander.

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