2017 Lexus GS450h Is Leaking Oil

Discovering the Causes of Oil Leaks in Your 2017 Lexus GS450h and How to Address Them 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 Lexus GS450h 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 Lexus GS450h 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

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 2017 Lexus GS450h?

When diagnosing an oil leak in a 2017 Lexus GS450h, it's essential to adopt a systematic approach that prioritizes simpler checks before moving on to more complex diagnostics. Start by thoroughly inspecting the engine bay and the area beneath the vehicle, focusing on common leak points such as the oil pan, oil filter, and drain plug. This visual inspection can often reveal obvious signs of oil leakage. Next, check the oil levels to determine if there has been a significant drop, which could indicate a leak. Pay close attention to the oil filter and drain plug; ensure they are securely fastened and free from damage, as these components are frequent culprits of leaks. Additionally, examine the gaskets and seals for any signs of wear or deterioration, as these can also lead to oil escaping from the engine. If the source of the leak remains elusive, consider adding UV dye to the oil, which can help illuminate the leak under UV light. Finally, if necessary, perform a pressure test on the oil system to accurately identify any hidden leaks. By following this structured diagnostic approach, you can effectively pinpoint the source of the oil leak and take appropriate action to resolve it.

What are the common causes of oil leaks in a 2017 Lexus GS450h?

When addressing oil leaks in a 2017 Lexus GS450h, it's important to recognize the various common problems that can lead to this issue. One of the primary causes is the degradation of the oil pan gasket, which can deteriorate over time due to heat exposure and engine vibrations, resulting in leaks. Additionally, worn valve cover gaskets often fail to maintain a proper seal, allowing oil to escape from the engine. It's also vital to check the oil filter housing gasket; a faulty gasket can lead to oil leaks within the engine compartment. Leaking oil cooler lines are another potential source of oil loss, creating unsightly messes beneath the vehicle. Lastly, damaged oil seals, such as those found around the crankshaft and camshaft, can wear out and contribute to significant oil leaks. To mitigate these issues, regular maintenance and timely inspections are essential, as they help identify potential problems early, preventing further damage and ensuring the longevity of your Lexus GS450h.

How urgent is it to address an oil leak in a 2017 Lexus GS450h?

When dealing with an oil leak in a 2017 Lexus GS450h, understanding the urgency of the situation is crucial for both vehicle performance and safety. The severity of the leak plays a significant role; while minor leaks may seem manageable, they can escalate into major issues if left unattended. A substantial oil leak not only leads to a rapid loss of oil but also compromises the engine's lubrication, increasing friction and the risk of severe engine damage over time. Moreover, oil leaks can create hazardous conditions, particularly if oil seeps onto hot engine components, potentially igniting a fire. Therefore, addressing an oil leak promptly is essential not just for maintaining optimal engine performance but also for ensuring the safety of the driver and passengers. Regular maintenance and immediate attention to any signs of leakage can prevent costly repairs and enhance the longevity of your vehicle, making it imperative to act swiftly when faced with this issue.

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