2010 BMW 750Li Is Leaking Oil

Common Causes of Oil Leaks in Your 2010 BMW 750Li 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 2010 BMW 750Li 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 2010 BMW 750Li 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 potential causes of an oil leak in a 2010 BMW 750Li, and how should I diagnose it?

When faced with an oil leak in your 2010 BMW 750Li, it's essential to adopt a systematic diagnostic approach to identify the source effectively. Start with a thorough visual inspection of the engine and undercarriage, looking for any signs of oil accumulation or drips. This initial step can often reveal obvious leaks from components like the valve cover gasket or oil filter housing. Next, monitor your oil levels regularly; a significant drop can indicate a leak that needs immediate attention. If the source remains elusive, consider adding UV dye to your engine oil, which can illuminate the leak's origin under UV light, making it easier to spot. For a more precise diagnosis, conducting a pressure test can help pinpoint the leak's location. If these methods do not yield results, consulting a qualified mechanic or BMW specialist is advisable, as they can provide a more in-depth analysis and repair options. By following this structured approach, you can effectively tackle oil leaks and maintain your BMW's performance.

What are the common causes of oil leaks in a 2010 BMW 750Li?

When dealing with oil leaks in a 2010 BMW 750Li, 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 oil system components, which can lead to significant leaks if not addressed. Additionally, the deterioration of engine gaskets and seals over time is a frequent issue, as these parts can wear down due to age and mileage, allowing oil to escape at the seams. Among the various gaskets, the valve cover gasket is particularly notorious for leaking, often resulting in visible oil accumulation around the engine. However, identifying the exact source of an oil leak can be challenging, as oil may drip down into lower areas or even burn off while driving, obscuring the leak's origin. It's crucial for DIY enthusiasts to regularly inspect the lower engine area, as undetected leaks can lead to severe engine problems if left unattended. By understanding these common causes, you can take proactive steps to maintain your BMW and address any oil leaks promptly.

How urgent is it to address the oil leak in my 2010 BMW 750Li?

Addressing an oil leak in your 2010 BMW 750Li is not just a matter of routine maintenance; it is an urgent issue that requires immediate attention. Ignoring an oil leak can lead to severe consequences, including reduced engine performance and overheating, which can ultimately result in catastrophic engine failure. The longer you wait to identify and repair the source of the leak, the more likely you are to experience persistently low oil levels, which can cause irreversible damage to your engine and other critical components. This not only compromises the safety and reliability of your vehicle but can also lead to costly repairs down the line. Therefore, it is essential to act swiftly and address any signs of an oil leak to ensure the optimal functioning and longevity of your BMW 750Li.

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2010 BMW 750Li Oil Leak Causes & Repair Costs | RepairPal