BMW 735iL Is Leaking Oil

Discovering the Causes of Oil Leaks in Your BMW 735iL 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 BMW 735iL 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 BMW 735iL 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.

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.

How to Diagnose and Fix Oil Leaks in a BMW 735iL?

When tackling oil leaks in your BMW 735iL, it's essential to adopt a systematic diagnostic approach. Start by identifying the source of the leak, focusing on common culprits such as the valve cover gasket, timing cover gasket, and oil filter housing. Regularly checking your oil levels can help you catch leaks early, preventing more significant issues down the line. Look for telltale signs like oil stains on the ground, a burning smell, or low oil levels indicated on the dipstick. If you notice any of these symptoms, it’s crucial to address the problem promptly to avoid potential engine damage. Understanding the repair costs associated with different leaks can also guide your decision-making; for instance, a simple valve cover gasket replacement may cost around $200, while more complex repairs like an oil pan gasket can exceed $750. By following this structured approach, you can effectively diagnose and resolve oil leaks, ensuring your BMW remains in optimal condition.

How to Diagnose and Fix Oil Leaks in a BMW 735iL?

When tackling oil leaks in a BMW 735iL, it's essential to understand the common problems that can arise within the engine's sealing systems. One of the most frequent issues is the deterioration of gaskets and seals, particularly around the valve cover and oil filter housing, which can lead to significant oil loss. Additionally, the timing cover gasket is another common culprit that may require attention. Regularly monitoring oil levels is crucial, as low oil can indicate a leak and lead to further engine damage if not addressed promptly. Symptoms such as oil stains on the ground, a burning smell, or warning lights on the dashboard should not be ignored, as they can signal underlying issues that need immediate repair. By being aware of these common problems and their symptoms, you can take proactive steps to diagnose and fix oil leaks, ensuring your BMW remains in optimal condition and preventing costly repairs down the line.

How Urgent is it to Address an Oil Leak in a BMW 735iL?

Addressing an oil leak in your BMW 735iL is not just a matter of convenience; it is a critical maintenance task that demands immediate attention. Ignoring the signs of an oil leak can lead to severe engine damage, resulting in costly repairs that could have been easily avoided. Common indicators such as oil spots on the ground, a burning smell, or smoke emanating from the engine should never be overlooked, as they signal that your vehicle is in distress. The primary culprits behind these leaks often include worn seals and gaskets, which are more susceptible to failure in older or high-mileage vehicles. By promptly replacing these components, you not only safeguard your engine's integrity but also enhance the overall performance and longevity of your BMW. Delaying repairs can escalate the problem, leading to more extensive damage and potentially compromising your safety on the road. Therefore, it is imperative to act swiftly when you notice any signs of an oil leak to ensure your vehicle remains in optimal condition.

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BMW 735iL Car Leaking Oil