2015 BMW 535d Is Leaking Oil

Discovering the Causes of Oil Leaks in Your 2015 BMW 535d and How to Address Them Effectively

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Reviewed by
Devin Cabugcal
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 BMW 535d is leaking oil are oil system component failure and leaking engine gaskets.
  • Oil System Components: A failure in oil system components, such as a worn oil pump or clogged oil filter, can lead to 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 BMW 535d 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 are the steps to diagnose the oil leak in a 2015 BMW 535d?

To effectively diagnose an oil leak in your 2015 BMW 535d, start by visually inspecting the engine for signs of oil accumulation or dripping. Common culprits include the valve cover gasket, timing cover gasket, and oil filter housing, so pay close attention to these areas. Use a clean cloth to wipe down these components, which can help you pinpoint the source of the leak more easily. Additionally, regularly checking your oil levels is crucial; this not only ensures your engine remains well-lubricated but also allows you to detect any drops in oil levels that may indicate a leak. By following this diagnostic approach, you can systematically assess the situation, starting with the most accessible areas before considering more complex repairs, ultimately leading to a more efficient resolution of the issue.

What are the common causes of oil leaks in a 2015 BMW 535d?

When dealing with oil leaks in a 2015 BMW 535d, it's crucial to understand the common culprits that may be at play. One of the primary issues is a worn valve cover gasket, which is notorious for allowing oil to seep out, especially as the vehicle ages. Additionally, the deterioration of engine gaskets and seals over time can lead to leaks, as these components are designed to maintain a tight seal but can fail due to wear and tear. It's important to note that oil leaks may not always be immediately visible; oil can drip into lower areas of the engine or burn off during operation, making it difficult to pinpoint the exact source of the leak. Therefore, a thorough inspection of specific components, particularly the valve cover gasket, is essential for any DIY enthusiast looking to tackle this issue. Addressing these leaks promptly is vital to prevent further damage and maintain the vehicle's performance.

How urgent is it to address an oil leak in a 2015 BMW 535d?

Addressing an oil leak in your 2015 BMW 535d is not just a matter of convenience; it is a critical maintenance task that requires immediate attention. Ignoring an oil leak can lead to severe engine damage, resulting in costly repairs that could have been easily avoided. The urgency stems from the fact that oil leaks can escalate quickly, leading to a significant loss of oil, which is essential for lubricating engine components and preventing overheating. Moreover, the source of the leak must be accurately identified, as it could originate from common areas such as the valve cover gasket or oil filter housing. While some leaks may be minor and manageable with simple repairs, others could necessitate extensive disassembly and professional expertise. Regularly monitoring your oil levels is crucial to ensure that the leak does not compromise engine performance. In summary, addressing an oil leak promptly is vital for maintaining the health and longevity of your BMW, safeguarding against potential safety risks and extensive damage.

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