2003 Ford Explorer Sport Is Leaking Oil

Discovering the Causes of Oil Leaks in Your 2003 Ford Explorer Sport and How to Fix Them Effectively

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Reviewed by
Devin Cabugcal
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 2003 Ford Explorer Sport 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 2003 Ford Explorer Sport 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

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 steps should I take to diagnose the oil leak in my 2003 Ford Explorer Sport?

To diagnose an oil leak in your 2003 Ford Explorer Sport, begin by thoroughly inspecting the area beneath your vehicle for any visible signs of oil, such as drips or puddles. This initial step will help you pinpoint the general location of the leak. Next, examine the oil pan for any cracks or damage, as this is a common source of leaks. Ensure that the oil filter is securely installed and not leaking, as a loose or damaged filter can also contribute to oil loss. Additionally, check the oil drain plug to confirm it is tight; a loose plug can easily lead to leaks. The valve cover gasket is another critical area to inspect, as it often deteriorates over time and can allow oil to escape. Don’t forget to look at the oil cooler lines for any signs of wear or damage, as these can also be culprits. Lastly, assess the oil pressure sensor for any leaks, and keep an eye on your oil levels to monitor for significant drops. By following this systematic approach, you can effectively diagnose the oil leak and take the necessary steps to resolve the issue.

What are the common causes of oil leaks in a 2003 Ford Explorer Sport?

When diagnosing oil leaks in a 2003 Ford Explorer Sport, it's essential to understand the common problems that may arise. One frequent culprit is the oil pan gasket, which can wear out over time, leading to leaks at the bottom of the engine. Similarly, valve cover gaskets are prone to degradation, causing oil to seep from the top of the engine, which can be particularly messy and noticeable. Another area to inspect is the oil filter housing gasket; if this component fails, it can result in oil leaking near the oil filter, making it crucial to check during routine maintenance. Additionally, the rear main seal is another potential source of leaks, as it can wear out and allow oil to escape from the back of the engine. Lastly, don't overlook the oil cooler lines, as leaks in these lines can also contribute to oil loss. By identifying these common issues, DIYers can take proactive steps to inspect and address oil leaks, ensuring their Ford Explorer remains in good working condition.

How urgent is it to address the oil leak in my 2003 Ford Explorer Sport?

Addressing an oil leak in your 2003 Ford Explorer Sport is an urgent matter that should not be overlooked. Ignoring this issue can lead to severe engine damage, which may result in costly repairs or even complete engine failure. Additionally, an oil leak poses significant safety risks; it can create slippery road conditions, increasing the likelihood of accidents for both you and other drivers. Beyond personal safety, there are environmental implications to consider, as oil leaks can contaminate soil and water sources, contributing to broader ecological harm. Furthermore, a leaking oil system can compromise your vehicle's performance, affecting engine lubrication and overall efficiency. Therefore, it is crucial to act swiftly to address the oil leak, ensuring not only the longevity of your vehicle but also the safety of yourself and others on the road.

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