2017 Toyota Highlander Is Leaking Oil

Address Oil Leaks in Your 2017 Toyota Highlander Effectively

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Reviewed by
Andrew Hajjar
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 2017 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 2017 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.

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 2017 Toyota Highlander?

When diagnosing an oil leak in your 2017 Toyota Highlander, it's essential to adopt a systematic approach that begins with the most straightforward checks. Start by locating the leak; inspect the area beneath your vehicle for any oil drips or puddles, and examine the engine and transmission for wet spots or stains. 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 securely tightened, as loose components can often be the source of leaks. Additionally, inspect the gaskets and seals for any signs of wear or damage, as these are common culprits for oil leaks. If the source remains elusive, consider using UV dye in the engine oil, which can help highlight leaks when viewed under a UV light. For more complex issues, performing a pressure test on the oil system can pinpoint leaks in hoses or fittings. If these methods do not yield results, consulting a professional mechanic is advisable, as they possess the expertise and tools necessary for a thorough diagnosis and repair. By following this structured diagnostic approach, you can effectively identify and address the oil leak in your Highlander.

What are the common causes of oil leaks in a 2017 Toyota Highlander?

When dealing with oil leaks in a 2017 Toyota Highlander, 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 or improperly installed oil filter can also be a source of oil leakage, so it's important to ensure that the filter is correctly fitted during oil changes. Another common problem is the valve cover gasket, which can deteriorate with age, resulting in leaks that may not be immediately visible. Furthermore, the oil cooler lines can develop leaks due to wear and tear, and any cracks or damage to the oil pan itself can also cause significant oil loss. Addressing these issues promptly is essential not only for maintaining the vehicle's performance but also for preventing potential engine damage. Regular inspections and maintenance can help you catch these problems early, allowing for a DIY fix that can save you time and money.

How urgent is it to address the oil leak in a 2017 Toyota Highlander?

Addressing an oil leak in your 2017 Toyota Highlander is not just a matter of routine maintenance; it is a pressing concern that requires immediate attention. Oil leaks can significantly reduce oil levels, leading to inadequate lubrication of the engine, which can cause severe damage over time. If left unchecked, the situation can escalate, resulting in engine overheating or even catastrophic engine failure, both of which can be costly to repair. Moreover, the safety implications of an oil leak cannot be overlooked; oil dripping onto hot engine components poses a serious fire hazard. By regularly monitoring for leaks and addressing them promptly, you not only safeguard your vehicle's performance but also enhance its longevity. Therefore, if you notice any signs of an oil leak, it is crucial to act swiftly to prevent further damage and ensure the safety and reliability of your Highlander.

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