2021 Mercedes-Benz G63 AMG Is Leaking Oil

Troubleshooting Oil Leaks in Your 2021 Mercedes-Benz G63 AMG: Causes and Solutions for a Smooth Ride

Find Repair Location
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 2021 Mercedes-Benz G63 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 2021 Mercedes-Benz G63 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.

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 potential causes of an oil leak in a 2021 Mercedes-Benz G63 AMG, and how should I diagnose it?

When diagnosing an oil leak in your 2021 Mercedes-Benz G63 AMG, it's essential to adopt a systematic approach that prioritizes simplicity and efficiency. Begin with a thorough visual inspection of the vehicle's undercarriage, looking for any visible signs of oil accumulation or drips. This initial step can often reveal the source of the leak without further disassembly. Next, regularly monitor your oil levels; a sudden drop can indicate a significant leak that requires immediate attention. Pay close attention to the condition of gaskets and seals, as these components are common culprits for leaks due to wear over time. Inspect the oil pan and drain plug for any signs of damage or looseness, as these areas are prone to oil seepage. Additionally, examine the oil filter and its housing, as a faulty filter can lead to leaks. Don't overlook the valve cover gasket and oil cooler lines, which can also contribute to oil leaks if they are worn or damaged. By following this structured diagnostic approach, you can effectively identify the source of the oil leak and take the necessary steps to resolve the issue, ensuring your G63 AMG remains in optimal condition.

What are the common causes of oil leaks in a 2021 Mercedes-Benz G63 AMG?

When dealing with oil leaks in a 2021 Mercedes-Benz G63 AMG, it's crucial to understand the common sources of these leaks to effectively tackle the problem. One of the primary culprits is the oil pan gasket, which can deteriorate over time, leading to oil seepage. Similarly, the valve cover gasket is another frequent source of leaks; if it becomes worn or damaged, it can allow oil to escape. Additionally, the oil filter housing may develop leaks due to issues with its gasket or seals, resulting in oil leaking from this area. The oil cooler lines are also worth inspecting, as damage or wear can lead to oil loss. Furthermore, a loose or improperly sealed oil drain plug can contribute to leaks, making it essential to ensure it is tightened correctly during oil changes. Lastly, various seals throughout the engine can degrade over time, so regular maintenance and inspections are vital to catch these issues early. By being proactive and addressing these common causes, G63 AMG owners can maintain their vehicle's performance and reliability.

How urgent is it to address the oil leak in my 2021 Mercedes-Benz G63 AMG?

Addressing an oil leak in your 2021 Mercedes-Benz G63 AMG is not just a matter of convenience; it is a critical issue that demands immediate attention. Ignoring an oil leak can lead to severe engine damage due to inadequate lubrication, which may result in overheating or even catastrophic engine failure. The high-performance nature of the G63 AMG means that its engine components are finely tuned and require optimal oil levels to function correctly. Additionally, the environmental impact of oil leaks cannot be overlooked, as they can contaminate soil and water sources, contributing to pollution. From a financial perspective, early intervention can save you from incurring more significant repair costs down the line, as prolonged leaks often lead to extensive damage that is far more expensive to fix. Therefore, if you notice any signs of an oil leak, it is crucial to act swiftly to protect both your vehicle and the environment.

You’ve got options with RepairPal

Whether you need a more accurate auto repair estimate or help finding a reputable shop in your area, we’ve got you covered.

2021 Mercedes-Benz G63 AMG Oil Leak Causes & Repairs