2014 BMW 650i Gran Coupe Is Leaking Oil

Identifying the Causes of Oil Leaks in Your 2014 BMW 650i Gran Coupe and How to Address Them

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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 2014 BMW 650i Gran Coupe 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 2014 BMW 650i Gran Coupe 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 initial diagnostic steps to take for an oil leak in a 2014 BMW 650i Gran Coupe?

When faced with an oil leak in your 2014 BMW 650i Gran Coupe, the first step is to conduct a thorough visual inspection. Begin by checking underneath the vehicle for any signs of oil pooling or dripping, particularly around the oil drain plug and oil filter gasket, as these are common leak sources. Next, examine the top of the engine, paying close attention to areas around the turbocharger oil lines, which can also be prone to leaks. It’s essential to familiarize yourself with typical leak points specific to the BMW 650i, such as the valve cover gasket, oil pan gasket, and timing cover gaskets. By systematically inspecting these areas, you can often identify the source of the leak without the need for extensive disassembly. This methodical approach not only saves time but also helps you focus on simpler fixes before considering more complex repairs, making it an effective strategy for any DIY mechanic.

What are the common causes of oil leaks in a 2014 BMW 650i Gran Coupe?

When dealing with oil leaks in a 2014 BMW 650i Gran Coupe, it's essential to understand the common problems that can arise from its intricate engine design and aging components. One of the primary culprits is the failure of oil system components, particularly engine gaskets, which can deteriorate over time and allow oil to escape. The N62 engine, known for its performance, is particularly susceptible to leaks from the alternator bracket seal or O-ring; if this O-ring fails, it can result in significant oil loss while driving. Additionally, the valve cover gasket is notorious for leaking in BMW models, as it encases the cylinder head and can wear out with age and mileage. The N63 V8 engine also presents unique challenges, as its design places turbos and catalytic converters in close proximity, leading to heat-related issues that can exacerbate oil leaks. Regular maintenance and thorough inspections are crucial for identifying these leaks early, ensuring that DIY enthusiasts can address them before they lead to more severe engine damage. Understanding these common failure modes will empower owners to take proactive steps in maintaining their vehicle's integrity.

How urgent is it to address the oil leak in my 2014 BMW 650i Gran Coupe?

Addressing an oil leak in your 2014 BMW 650i Gran Coupe is not just a matter of routine maintenance; it is a critical issue that demands immediate attention. Oil is vital for lubricating engine components, and a leak can lead to a significant loss of oil, jeopardizing the engine's performance and longevity. If left unaddressed, low oil levels can result in severe engine damage or even complete failure, which can be both costly and inconvenient. Moreover, an oil leak poses a safety risk, as leaking oil can ignite when it comes into contact with hot engine parts, potentially leading to a fire hazard. Common leak sources in BMWs, such as the engine, valve cover gaskets, and oil pan gasket, should be inspected promptly. By identifying and repairing the leak early, you can avoid more extensive damage and expensive repairs down the line, ensuring your vehicle remains safe and reliable on the road.

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2014 BMW 650i Gran Coupe Oil Leak Causes & Repairs