Mitsubishi Galant Engine Oil Pressure Switch Guide (1985-2003)
Understand the common oil light issues in your 1985-2003 Mitsubishi Galant and how to fix them.
- A flickering oil light on a Galant is very often just a bad oil pressure switch, which is a cheap and easy fix.
- Always check your oil level first if the warning light comes on.
- Do not drive if the oil light is on, as you risk catastrophic engine failure if the problem is not the sensor.
- Quality aftermarket brands are a cost-effective and reliable choice for this repair.
Understanding the Oil Pressure Light in Your Galant
For many 1985-2003 Mitsubishi Galant owners, a flickering or constantly lit oil pressure light is a common concern. Often, this happens at idle or low RPMs and goes away when you accelerate. 🎬 Watch: Why your oil light flashes while driving While this can signal a serious issue like a failing oil pump or low oil level, it frequently points to a much simpler and cheaper problem: a faulty engine oil pressure switch. Before assuming the worst, it's important to rule out this common failure point.
Common Failure Symptoms
A bad oil pressure switch can mimic the signs of major engine trouble, creating unnecessary worry. The most common symptom is the oil warning light flickering or staying on, especially when the engine is warm and idling. You might also see incorrect readings on an oil pressure gauge if your model has one. In some cases, the sensor itself can fail internally and leak oil, which you might notice on the engine block or on the ground. It's crucial to verify the actual oil pressure with a mechanical gauge before undertaking expensive repairs.
Don't Ignore the Oil Light
Even though a faulty switch is a common cause, you should never ignore an oil pressure warning. Always check your oil level immediately. If the level is correct, it's best to have the vehicle towed to a mechanic to test the actual oil pressure. Driving with low oil pressure can destroy your engine.
Choosing the Right Aftermarket Switch
For a vehicle like the 1985-2003 Galant, a high-quality aftermarket oil pressure switch offers performance comparable to OEM without the high cost. There's no significant evidence to suggest that only an OEM part will suffice. Aftermarket brands provide a reliable and affordable solution. Here’s a look at some available brands:
- Standard Ignition (SMP): A well-regarded brand in the aftermarket, often seen as a reliable replacement.
- Hella: A German brand known for quality electronic components.
- Facet: An Italian manufacturer with a long history, generally considered a decent option for European cars and a viable choice for others.
- Holstein, Rostra Powertrain, Global Parts: These brands offer budget-friendly options that meet standard replacement needs.
When replacing the switch, it's a good idea to apply thread sealant or Teflon tape to the new sensor's threads if it doesn't come pre-applied. This helps prevent oil leaks. Also, clean the electrical connector and consider adding a small amount of dielectric grease to protect the connection.
🎬 See this step-by-step guide to replacing a faulty switchCost of a New Oil Pressure Switch (1985-2003 Mitsubishi Galant)
| Part Type | Estimated Cost |
|---|---|
| New Aftermarket | $7 - $60 |
| Shop Labor | $50 - $100 |
Frequently Asked Questions
Where is the oil pressure switch located on my Galant?
The oil pressure switch on the 1985-2003 Mitsubishi Galant is typically located on the engine block, often near the oil filter housing. On many 2.4L engines, it's on the back side of the block and is easiest to access from underneath the vehicle.
🎬 Watch: Locating and changing the sensor on a MitsubishiIs it difficult to replace the oil pressure switch myself?
For a DIY mechanic with basic tools, this is a relatively easy job. It usually involves raising the car, unplugging the electrical connector, and using a special deep socket (often 24mm or 27mm) to unscrew the old switch and install the new one. The entire process can often be done in under an hour.
My oil light is on, but my oil level is full. What should I do?
If your oil level is correct, the next most likely cause is a faulty oil pressure switch. However, you should not continue to drive the car. The safest option is to have a mechanic verify the engine's actual oil pressure with a mechanical gauge to rule out a more serious problem like a failing oil pump.
Are there any recalls for the oil pressure switch on the 1985-2003 Galant?
Searches of the National Highway Traffic Safety Administration (NHTSA) database did not show any specific recalls or technical service bulletins (TSBs) for engine oil pressure switch failure on the 1985-2003 Mitsubishi Galant for the US market. Some TSBs exist for newer models of other vehicles regarding leaking switches.
Helpful Videos
Technical Specifications
OEM Part Numbers: MN137360
Typically a single-pin, blade-type connector. Socket size for removal is often 24mm or 27mm deep socket.
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The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
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