2013 BMW 640i Is Leaking Oil

Identifying the Causes of Oil Leaks in Your 2013 BMW 640i 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 2013 BMW 640i 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 2013 BMW 640i 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 identify the source of the oil leak in a 2013 BMW 640i?

To effectively identify the source of an oil leak in your 2013 BMW 640i, begin with a thorough visual inspection. Park your vehicle on a level surface and allow the engine to cool down to ensure safety. Once ready, check beneath the car for any oil puddles, paying close attention to the oil pan and drain plug, as these are common leak points. It's essential to wear protective gear, including gloves and safety glasses, to safeguard yourself during the inspection process. If you cannot locate the leak through visual methods, consider utilizing a UV dye and light, which can help illuminate the source of the leak more effectively. Additionally, make it a habit to regularly observe the ground beneath your vehicle for any new oil spots or drips, as early detection can significantly aid in pinpointing the issue. By following these diagnostic steps, you can systematically assess the situation and take the necessary actions for repairs, ensuring your BMW remains in optimal condition.

What are the common causes of oil leaks in a 2013 BMW 640i?

When tackling oil leaks in a 2013 BMW 640i, it's essential to understand the most common culprits that could be causing the problem. One of the primary sources of oil leaks is the valve cover gasket, which is known to wear out over time, especially in the N55 engine found in this model. Additionally, the oil filter housing gasket is another frequent offender, as it can deteriorate and lead to oil seepage. As the vehicle ages and accumulates mileage, other gaskets and seals may also become worn, contributing to oil leaks. Identifying the specific source of the leak is crucial, as it not only helps in determining the right repair but also prevents further complications such as a burning oil smell, oil stains on the driveway, and dangerously low oil levels that could damage the engine. Regular maintenance and prompt repairs are key to keeping your BMW 640i in optimal condition and preventing these common oil leak issues.

How urgent is it to address the oil leak in my 2013 BMW 640i?

Addressing an oil leak in your 2013 BMW 640i is not just a matter of routine maintenance; it is an urgent necessity that can significantly impact your vehicle's performance and longevity. Ignoring an oil leak can lead to reduced engine efficiency, as the engine struggles to operate without adequate lubrication. This inefficiency can manifest as decreased power and responsiveness, making your driving experience less enjoyable and potentially unsafe. Moreover, oil leaks can cause the engine to overheat, which poses a serious risk of damaging critical components and can drastically shorten the lifespan of your vehicle. The most alarming consequence of neglecting an oil leak is the risk of complete engine failure, which can result in exorbitant repair costs or even necessitate a full engine replacement. Therefore, if you notice any signs of an oil leak, it is imperative to address the issue immediately to safeguard your vehicle's performance and avoid costly repairs down the line.

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2013 BMW 640i Oil Leak Causes & Repair Costs | RepairPal