2015 Lexus IS250 Is Leaking Oil

Identifying the Causes of Oil Leaks in Your 2015 Lexus IS250 and How to Address Them Effectively

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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 2015 Lexus IS250 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 2015 Lexus IS250 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 steps should I take to diagnose the oil leak in my 2015 Lexus IS250?

To effectively diagnose an oil leak in your 2015 Lexus IS250, begin with a systematic approach that prioritizes simplicity and thoroughness. Start by locating the leak; check beneath your vehicle for any visible oil spots or puddles, which can provide initial clues. Next, inspect the engine components, focusing on areas like the oil pan, valve cover gasket, oil filter, and oil drain plug for any signs of oil residue or damage. It's also crucial to check the oil level, as a significant drop may indicate a leak. Pay special attention to the oil filter and drain plug, ensuring they are secure and free from leaks. Additionally, examine the oil pan for cracks and the valve cover gasket for any seepage. If these steps do not reveal the source of the leak, or if the problem persists, it may be time to seek professional assistance. This methodical approach not only helps in identifying the issue but also ensures that you address the simplest potential problems before moving on to more complex diagnostics.

What are the common causes of oil leaks in a 2015 Lexus IS250?

When diagnosing oil leaks in a 2015 Lexus IS250, 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 lead to oil seepage as it ages. Additionally, valve cover gaskets are known to wear out over time, resulting in leaks from the top of the engine. Another area to inspect is the oil filter housing gasket, which can deteriorate and cause oil to escape. The rear main seal, located at the back of the engine, is also a potential source of leaks, as its failure can lead to significant oil loss. Lastly, oil cooler line leaks can occur, contributing to oil leakage from the engine. Addressing these issues promptly is essential to prevent further damage and ensure optimal vehicle performance. Regular maintenance and thorough inspections can help you catch these problems early, allowing for effective DIY repairs.

How urgent is it to address the oil leak in a 2015 Lexus IS250?

Addressing an oil leak in your 2015 Lexus IS250 is not just a matter of routine maintenance; it is a pressing concern that requires immediate attention. Ignoring an oil leak can lead to a significant drop in oil levels, which compromises the engine's lubrication system and increases the risk of severe damage to engine components over time. Furthermore, a persistent leak can cause the engine to overheat, potentially resulting in catastrophic mechanical failures that could leave you stranded or facing costly repairs. The safety implications are equally alarming, as leaking oil can drip onto hot engine parts, creating a fire hazard that endangers both you and your vehicle. By tackling the oil leak promptly, you not only safeguard your engine's health but also prevent more extensive and expensive repairs down the line. Therefore, if you notice any signs of an oil leak, it is crucial to act swiftly to maintain the performance and safety of your Lexus IS250.

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2015 Lexus IS250 Oil Leak Causes & Repairs | RepairPal