2017 BMW 440i Gran Coupe Is Leaking Oil

Address Oil Leaks in Your 2017 BMW 440i Gran Coupe Effectively

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Reviewed by
Bo Fader
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 2017 BMW 440i Gran Coupe is leaking oil are oil system component failure and leaking engine gaskets.
  • Oil System Components: A worn or damaged oil pump or filter can lead to low oil pressure, resulting in 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 2017 BMW 440i 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.

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 steps to diagnose the oil leak in a 2017 BMW 440i Gran Coupe?

To effectively diagnose an oil leak in your 2017 BMW 440i Gran Coupe, start by locating the source of the leak. Begin with a thorough inspection of the engine bay and the area beneath the vehicle, looking for any visible oil spots or drips that may indicate where the leak is originating. Once you have a potential source, check the oil level to ensure it is within the recommended range; a significant drop could signal a more serious issue. Next, examine the oil filter and drain plug for any signs of looseness or leakage, as these components are common culprits. Additionally, inspect the gaskets and seals around critical engine parts, such as the valve cover and oil pan, since these can wear out over time and lead to leaks. If the source remains elusive, consider performing a pressure test to help identify leaks in the oil cooler or lines. Should you find the process overwhelming or if the leak persists, consulting a qualified mechanic or a BMW service center is advisable for a professional assessment and repair. By following this diagnostic approach, you can systematically address the issue and maintain the performance of your vehicle.

What are the common causes of oil leaks in a 2017 BMW 440i Gran Coupe?

When dealing with oil leaks in a 2017 BMW 440i Gran Coupe, it's crucial to understand the common culprits that may be at play. One of the primary issues is the degradation of gaskets and seals, which can occur over time due to exposure to heat and engine vibrations, leading to leaks. Additionally, the oil pan is susceptible to damage from road debris or impacts, resulting in cracks or dents that can allow oil to escape. Another frequent source of leaks is the valve cover gasket, which can deteriorate and fail, causing oil to seep out. The oil filter housing gasket is also a potential problem area; if it fails, it can lead to significant oil loss. Lastly, a faulty oil cooler can contribute to leaks, as it may not maintain proper sealing under pressure. By regularly inspecting these components and addressing any signs of wear or damage, DIY enthusiasts can effectively manage and prevent oil leaks, ensuring the longevity and performance of their vehicle.

How urgent is it to address the oil leak in my 2017 BMW 440i Gran Coupe?

Addressing an oil leak in your 2017 BMW 440i Gran Coupe is crucial, as the urgency of the situation can significantly impact both your vehicle's performance and your safety. A minor leak might seem manageable, but even small issues can escalate quickly, leading to insufficient lubrication and increased friction within the engine. This can result in severe engine damage over time, which not only compromises your vehicle's functionality but can also lead to costly repairs. Moreover, oil leaks pose safety risks, especially if the leaking oil comes into contact with hot engine components, potentially creating a fire hazard. Therefore, it is essential to regularly monitor your oil levels and address any leaks promptly. While there may be some upfront costs associated with repairs, these are often far less than the expenses incurred from neglecting the issue. By prioritizing timely maintenance, you can ensure the longevity of your BMW 440i Gran Coupe and avoid the pitfalls of more extensive damage down the line.

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