2015 BMW 535i Is Leaking Oil

Discovering the Causes of Oil Leaks in Your 2015 BMW 535i 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 535i 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 535i 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 initial diagnostic steps to take for an oil leak in a 2015 BMW 535i?

When faced with an oil leak in your 2015 BMW 535i, the first step is to visually inspect the vehicle for any signs of oil pooling beneath it or in the engine compartment. This initial check can help you identify the general area where the leak may be originating. Next, examine critical components of the oil system, such as the oil lines, oil filter housing, valve cover gasket, and oil pan gasket, for any visible damage or wear that could be contributing to the leak. Pay special attention to the engine gaskets, as these are common culprits for oil leaks. Utilizing a diagnostic tool to review any OBD-II error codes can provide further insights into potential issues related to the oil system or engine performance. Additionally, keep an eye on your dashboard warning lights, as alerts related to oil pressure can indicate underlying problems that need addressing. By following these diagnostic steps, you can effectively narrow down the source of the oil leak and take the necessary actions to resolve it.

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

When tackling oil leaks in a 2015 BMW 535i, it's essential to understand the common problems that can arise within the vehicle's oil system. One of the primary culprits is the failure of engine gaskets, which can deteriorate over time due to heat and pressure, leading to leaks. Key areas to inspect include the valve cover gasket, oil filter housing gasket, and oil pan gasket, as these are frequently associated with oil leaks in BMWs. Additionally, the timing cover gasket and alternator bracket seal can also be potential sources of leaks. While oil cooler leaks are less common, they can still occur and should not be overlooked. By identifying these issues early and addressing them through proper repair or replacement of the faulty components, you can prevent further oil leaks and maintain the integrity of your BMW's engine.

How urgent is it to address the oil leak in my 2015 BMW 535i?

Addressing an oil leak in your 2015 BMW 535i is not just a matter of routine maintenance; it is a critical issue that demands immediate attention. Ignoring an oil leak can lead to severe engine problems, including reduced performance and overheating, which may ultimately result in complete engine failure. The longer you wait, the more likely you are to experience persistently low oil levels, which can cause irreversible damage to your engine over time. Additionally, neglecting this issue can escalate into more costly repairs down the line, as the damage worsens with each passing day. Regularly monitoring your oil levels and addressing any leaks promptly is essential to maintaining the health and longevity of your vehicle. By taking swift action, you can prevent further complications and ensure that your BMW continues to perform at its best.

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