2015 BMW X3 Is Leaking Oil

Discovering the Causes of Oil Leaks in Your 2015 BMW X3 and How to Address Them Effectively

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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 2015 BMW X3 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 X3 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 steps to diagnose the oil leak in a 2015 BMW X3?

To effectively diagnose an oil leak in your 2015 BMW X3, start with a thorough visual inspection of the vehicle. Look for any signs of oil accumulation under the car or within the engine bay, such as puddles, drips, or stains that could indicate the source of the leak. Next, regularly check the oil levels; a significant drop in oil can be a clear indicator of a leak. If you suspect a leak but cannot locate it, consider using UV dye, which can be added to the engine oil and will illuminate under UV light, helping you trace the leak's origin. For a more precise diagnosis, conducting a pressure test on the oil system can reveal whether the leak is stemming from the oil pan, gaskets, or other components. If these methods do not yield clear results, it may be wise to consult a trusted independent BMW specialist who possesses the expertise and tools necessary for an accurate diagnosis and repair. By following this structured approach, you can systematically identify and address the oil leak issue in your BMW X3.

What are the common causes of oil leaks in a 2015 BMW X3?

When dealing with oil leaks in a 2015 BMW X3, it's essential to understand the common problems that can arise. One of the primary culprits is the valve cover and gasket, which can wear out over time, leading to oil seeping out. Additionally, engine gaskets and seals may deteriorate, contributing to leaks as they age. It's also important to consider potential failures in oil system components, which can compromise the integrity of the oil system. The oil filter housing gasket is another frequent source of leaks, often overlooked during routine maintenance. Lastly, issues with the front and rear main seals can lead to significant oil loss if not addressed promptly. Regularly checking oil levels and conducting visual inspections of the engine bay can help you catch these problems early, allowing for timely repairs and preventing further damage to your vehicle.

How urgent is it to address the oil leak in my 2015 BMW X3?

Addressing an oil leak in your 2015 BMW X3 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 consequences, including the risk of starter failure, which can occur if oil seeps into the engine starter. This is particularly concerning for late model BMWs, where leaks are commonly observed between 80,000 and 120,000 miles. Additionally, if you notice sizzling or popping sounds from hot components, it is a clear indication that oil is leaking onto these parts, which can exacerbate the problem and lead to more extensive damage. By addressing the oil leak promptly, you not only safeguard your vehicle's performance but also prevent costly repairs in the future. Therefore, if you suspect an oil leak, it is imperative to take action swiftly to maintain the integrity and safety of your BMW X3.

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