2015 BMW M5 Is Leaking Oil

Identifying the Causes of Oil Leaks in Your 2015 BMW M5 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 M5 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 M5 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 2015 BMW M5?

To effectively diagnose the oil leak in your 2015 BMW M5, start by identifying the source of the leak, as this is crucial for determining the appropriate repair method. Common culprits include the valve cover gasket, timing cover gasket, and oil filter housing, so inspect these areas closely for any signs of oil accumulation. Regularly checking your oil levels can also provide valuable insights; a sudden drop in oil levels may indicate a leak that needs immediate attention. If you find it challenging to pinpoint the issue or if the leak persists, consulting a trusted BMW specialist is advisable. These professionals possess the expertise and tools necessary to accurately diagnose the problem and recommend effective solutions, often at a more reasonable cost than a dealership. By following this diagnostic approach, you can systematically address the oil leak and ensure your BMW M5 remains in optimal condition.

What are the common causes of oil leaks in a 2015 BMW M5?

When diagnosing oil leaks in a 2015 BMW M5, it's essential to understand the common culprits that may be at play. One of the primary sources of leaks is the valve cover gasket, which can deteriorate over time, allowing oil to seep out. Similarly, the oil pan gasket is prone to wear due to sludge buildup, leading to potential leaks that can affect engine performance. Another critical area to inspect is the rear main seal, as its failure can result in significant oil loss. Additionally, as the vehicle ages, various engine gaskets and seals may deteriorate, creating opportunities for oil to escape. It's also worth noting that oil leaks can sometimes be deceptive, with oil pooling in lower areas or burning off during operation, making it crucial to conduct a thorough inspection. Addressing these issues promptly not only helps maintain the M5's performance but also prevents further damage to the engine.

How urgent is it to address the oil leak in my 2015 BMW M5?

Addressing an oil leak in your 2015 BMW M5 is not just a matter of routine maintenance; it is a critical step in preserving the health of your vehicle. Ignoring an oil leak can lead to severe engine damage, as the lack of proper lubrication increases friction among engine components, potentially resulting in costly repairs. Moreover, the presence of oil on hot engine parts poses a significant fire hazard, making it essential to act swiftly. The urgency of the situation can vary based on the severity of the leak, but even minor leaks should not be overlooked. It is advisable to conduct a thorough inspection and, if necessary, consult a qualified mechanic to assess the situation accurately. By addressing the oil leak promptly, you not only maintain optimal engine performance but also ensure your safety on the road.

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