2016 Lexus RX350 Is Leaking Oil

Identifying the Causes of Oil Leaks in Your 2016 Lexus RX350 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 2016 Lexus RX350 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 2016 Lexus RX350 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 steps to diagnose an oil leak in a 2016 Lexus RX350?

To effectively diagnose an oil leak in your 2016 Lexus RX350, begin by locating the source of the leak. Start by inspecting the area where your vehicle is parked for any signs of oil pooling or dripping. This initial observation can provide clues about the leak's origin. Next, check the oil level using the dipstick; a significant drop may indicate a leak that needs immediate attention. Move on to a thorough inspection of the engine, paying close attention to areas around the valve cover gasket, oil pan, oil filter, and drain plug for any visible oil residue or buildup. The oil filter should also be examined for signs of damage or leakage. Additionally, inspect the oil pan for any cracks or dents that could be causing the leak, and ensure that the oil drain plug is securely tightened. Don’t overlook the gaskets and seals, as wear and tear in these components can lead to leaks as well. If these preliminary checks do not reveal the source, consider performing a pressure test to help pinpoint the leak's exact location. Should you still be unable to identify the issue, it may be wise to consult a professional mechanic for a comprehensive inspection and repair. This systematic approach not only helps in identifying the problem but also empowers you to tackle the issue with confidence.

What are the common causes of oil leaks in a 2016 Lexus RX350?

When diagnosing oil leaks in a 2016 Lexus RX350, it's crucial to understand the common culprits that may be at play. One frequent issue is the degradation of the oil pan gasket, which can wear out over time, leading to noticeable leaks. Similarly, valve cover gaskets are prone to deterioration, and their failure can result in oil escaping from the engine. Another area to inspect is the oil filter housing gasket; if this seal fails, it can also contribute to oil leaks. Additionally, the rear main seal, located at the back of the engine, is another potential source of leaks, as it can develop wear and allow oil to seep out. Lastly, oil cooler lines are susceptible to wear and tear, which can lead to leaks as well. Addressing these issues promptly is essential to prevent further engine damage, and regular maintenance checks can help catch these problems early, ensuring your Lexus RX350 runs smoothly.

How urgent is it to address the oil leak in my 2016 Lexus RX350?

Addressing an oil leak in your 2016 Lexus RX350 is not just a matter of routine maintenance; it is a pressing issue that requires immediate attention. An oil leak can significantly reduce oil levels, leading to inadequate lubrication of engine components, which may result in severe engine damage over time. Furthermore, neglecting this problem can cause the engine to overheat, potentially leading to costly repairs or even complete engine failure. The safety implications are equally concerning, as leaking oil can drip onto hot engine parts, creating a fire hazard. By regularly monitoring for oil leaks and addressing them promptly, you can maintain your vehicle's performance and extend its lifespan. Therefore, it is crucial to act swiftly to mitigate these risks and ensure the safe and efficient operation of your Lexus RX350.

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