2017 BMW 440i XDrive Is Leaking Oil

Identifying the Causes of Oil Leaks in Your 2017 BMW 440i xDrive and How to Address Them Effectively

Find Repair Location
Reviewed by
Aisha
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 xDrive 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 xDrive 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 steps should I take to diagnose the oil leak in my 2017 BMW 440i xDrive?

When diagnosing an oil leak in your 2017 BMW 440i xDrive, it's essential to adopt a systematic approach that begins with the most straightforward checks. Start by locating the leak; inspect the area beneath your vehicle for any oil drips or puddles, and examine the engine and transmission for oil stains. Next, check the oil level to see if it is consistently low, which could indicate a leak. Pay close attention to the oil filter and drain plug, ensuring they are secure and free from damage. Gaskets and seals are also critical components to inspect; look for wear or damage in the valve cover gasket, oil pan gasket, and camshaft seals, as these are common sources of leaks. If the source remains elusive, consider adding UV dye to the oil, which can help illuminate leaks under a UV light. For a more thorough investigation, a pressure test of the oil system can reveal leaks in the lines or fittings. If these steps do not yield results, consulting a professional mechanic is advisable, as they possess the expertise and tools necessary for more complex diagnostics. By following this structured approach, you can effectively identify and address the oil leak in your BMW.

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

When dealing with oil leaks in a 2017 BMW 440i xDrive, it's essential to understand the common culprits that may be at play. One of the primary sources of leaks is degraded or damaged gaskets and seals, particularly the valve cover gasket, oil pan gasket, and camshaft seal, which can wear out over time and allow oil to escape. Additionally, the oil filter housing gasket is another frequent offender; if it becomes worn or damaged, it can lead to significant leaks. It's also important to inspect the oil cooler lines and connections, as faulty components in this area can result in leaks within the engine compartment. Furthermore, issues with the oil drain plug or its seal can cause oil to leak from the oil pan, while any cracks or corrosion in the oil pan itself can exacerbate the problem. Addressing these issues promptly is crucial to prevent further engine damage, and regular maintenance checks can help identify potential leaks before they become serious problems. By understanding these common causes, DIY enthusiasts can take proactive steps to maintain their vehicle's integrity and performance.

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

When dealing with an oil leak in your 2017 BMW 440i xDrive, the urgency of the situation cannot be overstated. Ignoring an oil leak can lead to severe engine damage due to inadequate lubrication, which increases friction and heat within the engine components. This not only jeopardizes the performance of your vehicle but can also result in costly repairs down the line. Additionally, oil leaks pose environmental risks, as spilled oil can contaminate soil and water sources, contributing to pollution. Safety is another critical factor; oil on the road can create slippery conditions, heightening the risk of accidents. Furthermore, the longer you wait to address the leak, the more extensive the damage may become, leading to higher repair costs. Therefore, it is essential to act swiftly and have the leak inspected and repaired by a qualified mechanic to ensure the safety, performance, and longevity of your BMW.

You’ve got options with RepairPal

Whether you need a more accurate auto repair estimate or help finding a reputable shop in your area, we’ve got you covered.

2017 BMW 440i xDrive Oil Leak Repair Guide | RepairPal