2019 Mercedes-Benz GLA45 AMG Is Leaking Oil

Identifying the Causes of Oil Leaks in Your 2019 Mercedes-Benz GLA45 AMG and How to Address Them

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Reviewed by
Bo Fader
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 2019 Mercedes-Benz GLA45 AMG 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 2019 Mercedes-Benz GLA45 AMG 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 are the steps to diagnose the oil leak in a 2019 Mercedes-Benz GLA45 AMG?

When diagnosing an oil leak in a 2019 Mercedes-Benz GLA45 AMG, it's essential to adopt a systematic approach that begins with simple visual inspections and progresses to more complex diagnostics. Start by thoroughly examining the engine and undercarriage for any visible signs of oil, such as drips or pools, which can help pinpoint the leak's origin. Next, check the oil levels to determine if there has been a significant loss, indicating a potential leak. Pay close attention to the oil filter and drain plug, as these components can often be the culprits; ensure they are secure and free from leaks. Additionally, inspect the gaskets and seals around the oil pan, valve cover, and oil filter housing for any signs of wear or damage. If the source remains elusive, consider performing a pressure test on the oil system to uncover hidden leaks. For a more precise diagnosis, adding UV dye to the engine oil can illuminate the leak under UV light. If these steps do not yield results, consulting a qualified mechanic is advisable for a professional assessment and repair. This methodical approach not only helps in identifying the issue but also ensures that you address the problem effectively, saving time and resources in the long run.

What are the common causes of oil leaks in a 2019 Mercedes-Benz GLA45 AMG?

When dealing with oil leaks in a 2019 Mercedes-Benz GLA45 AMG, it's crucial to understand the common culprits that may be at play. One frequent issue is a degraded or damaged oil pan gasket, which can wear out over time and lead to significant leaks. Additionally, a faulty valve cover gasket can cause oil seepage, often noticeable around the engine's top. Another potential source of leaks is the oil filter housing gasket; if this component is compromised, it can result in oil escaping from the filter area. Furthermore, a cracked or damaged oil cooler can also contribute to leaks, as can a loose or damaged oil drain plug, which may allow oil to escape if not properly secured. Addressing these issues promptly is essential to prevent further engine damage and maintain the performance of your GLA45 AMG. Regular inspections and maintenance can help you catch these problems early, ensuring your vehicle remains in optimal condition.

How urgent is it to address an oil leak in a 2019 Mercedes-Benz GLA45 AMG?

Addressing an oil leak in your 2019 Mercedes-Benz GLA45 AMG is not just a matter of routine maintenance; it is a crucial step in safeguarding your vehicle's performance and safety. Oil leaks can lead to a significant loss of lubrication, which increases friction and heat within the engine, potentially resulting in severe damage if left unchecked. Moreover, neglecting an oil leak can cause oil levels to drop dangerously low, leading to inadequate lubrication of vital engine components and accelerating wear and tear. This not only jeopardizes the engine's longevity but also poses a serious safety risk, as leaking oil can ignite upon contact with hot engine parts, creating a fire hazard. By addressing the leak promptly, you can avoid more extensive and costly repairs in the future, ensuring that your GLA45 AMG remains in optimal condition. Therefore, if you notice any signs of an oil leak, it is imperative to take immediate action to protect your investment and maintain the vehicle's reliability.

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