2008 BMW 535i Is Leaking Oil

Discovering the Causes of Oil Leaks in Your 2008 BMW 535i 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 2008 BMW 535i 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 2008 BMW 535i 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 first steps to diagnose an oil leak in a 2008 BMW 535i?

To effectively diagnose an oil leak in your 2008 BMW 535i, start by inspecting the area where you typically park your vehicle for any oil spots, as these can provide initial clues about the leak's location. Next, check under the engine oil filter, a common area for leaks, and look for any visible signs of oil accumulation. Pay special attention to the valve cover gasket, as this is another frequent culprit in BMW models. Additionally, examine the front crank seal and the oil pan gasket for any signs of leakage. If you have access to a scan tool like the ANCEL BM700, use it to check for any engine error codes that may indicate issues related to oil pressure or engine performance. If these steps do not reveal the source of the leak, or if the problem seems complex, it may be wise to consult with a certified auto repair technician who specializes in BMWs. Addressing oil leaks promptly is crucial, as neglecting them can lead to significant engine damage and costly repairs down the line.

What are the common causes of oil leaks in a 2008 BMW 535i?

When dealing with oil leaks in a 2008 BMW 535i, it's crucial to understand the common culprits that may be at play. One of the primary sources of oil leaks is the worn valve cover gasket, which can deteriorate over time, allowing oil to escape. Additionally, the oil filter housing gasket is another frequent offender, often leading to noticeable leaks if it becomes compromised. As the vehicle ages, other engine gaskets and seals may also wear out, contributing to oil leaks that can be difficult to trace. It's important to inspect not just the obvious areas but also components like the oil pan gasket and the upper timing case cover gaskets, as these can also be potential leak points. Since oil leaks may not always be immediately visible, as oil can drip down to lower areas or burn off during driving, a thorough inspection is essential. Addressing these leaks promptly is vital to prevent further damage to the engine and ensure the vehicle operates smoothly. By understanding these common problems, DIY enthusiasts can take proactive steps to diagnose and repair oil leaks in their BMW 535i.

How urgent is it to address the oil leak in my 2008 BMW 535i?

Addressing an oil leak in your 2008 BMW 535i is not just a matter of convenience; it is a critical maintenance issue that requires immediate attention. Oil is vital for lubricating the engine, and a leak can lead to a significant loss of oil, which may result in engine wear and tear, ultimately compromising its performance and longevity. Ignoring this problem can escalate into severe engine damage that may be costly or impossible to repair. Additionally, oil leaks can create hazardous conditions, such as slippery surfaces under your vehicle, which pose safety risks not only to you but also to others on the road. The presence of an oil leak can trigger warning lights on your dashboard, indicating that the situation is worsening and should not be overlooked. Therefore, it is essential to act swiftly to diagnose and repair the leak, ensuring the safety and reliability of your BMW 535i.

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