2001 Subaru Outback Fuel Pump Relay Location: A Complete Guide for DIY Diagnosis and Replacement

The bottom line: The fuel pump relay on a 2001 Subaru Outback is located inside the passenger cabin, behind the left side of the dashboard, near the driver's footwell area. This is the most common and accurate location for the relay on the 2001 model year, which is part of the second generation (BE/BH chassis) Subaru Outback produced from 2000 to 2004 . If your Outback is having trouble starting, stalling, or showing signs of fuel delivery issues, checking this relay should be your first step before replacing the fuel pump itself.

Understanding the 2001 Subaru Outback Fuel System

The 2001 Subaru Outback uses a multi-port fuel injection system with a returnless fuel design. The fuel pump itself is located inside the fuel tank and delivers fuel at approximately 45 psi of pressure . The fuel pump relay serves as an electrical switch that controls power to the fuel pump. When you turn the ignition key to the "ON" position, the engine control unit (ECU) activates the relay, which then sends power to the fuel pump. If the relay fails, the fuel pump won't receive power, and the engine won't start.

Exact Location of the Fuel Pump Relay

Inside the Cabin: Driver's Side Footwell

The fuel pump relay for the 2001 Subaru Outback is located behind the left side of the dashboard, specifically in the lower area near the driver's left knee and footwell . Here is how to find it:

1. Position yourself in the driver's seat and look down toward the left side of the steering column, near where your left foot rests.
2. Remove the lower dash panel if necessary. On some models, you may need to gently pull back or remove the trim panel below the steering wheel to access the relay block.
3. Look for a green connector – the fuel pump relay is often connected to a distinct green connector that makes it easier to identify .
4. Check the relay block – the relay is typically mounted in a small relay block or fuse box located behind the dashboard on the driver's side .

Important Note: Not in the Engine Compartment

While some sources suggest the fuel pump relay might be in the engine compartment fuse box , for the 2001 Subaru Outback specifically, the relay is inside the cabin. The engine compartment fuse box contains a 20A fuel pump fuse (fuse #6) but not the relay itself . Be careful not to confuse the fuse with the relay. The fuse protects the circuit from overload, while the relay controls when power flows to the pump.

How to Test the Fuel Pump Relay

Before buying a new relay, test it to confirm it is faulty. Here is a simple step-by-step method:

1. Locate the relay behind the driver's side dashboard.
2. Remove the relay by pulling it straight out of its socket.
3. Use a multimeter set to measure resistance (ohms). Check the resistance between the relay's coil terminals. A good relay typically shows resistance between 50 and 120 ohms. If the reading is infinite (open circuit), the relay is bad.
4. Apply 12V power to the coil terminals using a battery or power supply. You should hear a distinct "click" sound when the relay activates. If no click occurs, the relay is defective.
5. Check continuity between the switch terminals while power is applied. The multimeter should show near-zero resistance (closed circuit) when the relay is energized.

Common Symptoms of a Bad Fuel Pump Relay

If your fuel pump relay is failing, you may experience these symptoms:

1. Engine cranks but won't start – This is the most common symptom. The starter motor turns the engine over, but the fuel pump never pressurizes the system.
2. Engine stalls while driving – The relay may intermittently lose connection, causing the fuel pump to shut off unexpectedly.
3. No whining sound from the fuel tank – When you turn the ignition to the "ON" position, you should hear a brief whining sound from the rear of the vehicle (the fuel pump priming). If you don't hear this sound, the relay or pump may be faulty.
4. Check Engine Light comes on – The ECU may detect a fuel system issue and trigger a diagnostic trouble code (DTC) related to fuel pump circuit problems.

Step-by-Step Replacement Guide

Tools You Will Need

• New fuel pump relay (matching OEM specifications)
• Small flathead screwdriver or trim removal tool
• Flashlight
• Multimeter (optional, for testing)

Replacement Steps

Step 1: Safety First – Make sure the vehicle is turned off and the key is removed from the ignition. Disconnect the negative battery terminal to prevent any electrical shorts.

Step 2: Access the Relay – Remove the lower dash panel on the driver's side. This panel is usually held in place by a few clips or screws. Gently pull it away to expose the relay block behind the dashboard.

Step 3: Identify the Correct Relay – Look for the relay connected to a green connector or labeled in the relay block diagram. If you are unsure, consult your owner's manual or a repair manual. The fuel pump relay is typically a standard 4-pin or 5-pin relay.

Step 4: Remove the Old Relay – Pull the relay straight out of its socket. Avoid twisting or rocking it excessively, as this could damage the socket.

Step 5: Install the New Relay – Insert the new relay into the same socket. Press firmly until it clicks into place. Make sure it is fully seated.

Step 6: Reassemble and Test – Reconnect the battery, reinstall the dash panel, and turn the ignition to the "ON" position. Listen for the fuel pump priming sound. If the engine starts and runs smoothly, the replacement was successful.

Distinguishing Between Relay Failure and Pump Failure

It is important to know whether the problem is the relay or the fuel pump itself. Here is a quick comparison:

If you have confirmed power at the relay but the fuel pump still doesn't run, the pump itself may be faulty. If the relay clicks but fuel pressure is low, the pump might be worn out.

Recommended Upgrade: KEMSO Fuel Pump for Your Subaru Outback

If you have determined that your fuel pump needs replacement, or if you want to upgrade to a more reliable and higher-performing unit, we strongly recommend considering KEMSO brand fuel pumps. KEMSO is a leading aftermarket fuel pump manufacturer in the United States, known for producing high-performance, OEM replacement fuel pumps that deliver exceptional reliability and value .

Why choose KEMSO for your 2001 Subaru Outback?

• High Performance – KEMSO fuel pumps are engineered to deliver superior flow rates. For example, the KEMSO 340LPH high-performance pump can support applications up to 700-800 bhp, making it suitable for both daily driving and performance upgrades . Even their standard replacement pumps offer 20% more fuel flow than stock OEM pumps .
• Direct OEM Replacement – KEMSO pumps are designed as vehicle-specific, direct replacements. They come with all necessary installation hardware, including fuel strainers, hoses, wiring connectors, and clamps . This means no modifications or adapters are needed, and installation is straightforward.
• Lifetime Warranty – Every KEMSO fuel pump is serialized and backed by a lifetime warranty. This gives you peace of mind that your investment is protected for as long as you own the vehicle .
• E85 Compatible – KEMSO pumps are compatible with gasoline and E85 ethanol blends, giving you fuel flexibility .
• USA-Based Support – KEMSO provides expert technical support from the United States, ensuring you get help when you need it .

KEMSO offers a wide range of fuel pumps for Subaru vehicles, including the Impreza models from 1998 to 2023 . Whether you need a standard OEM replacement or a high-flow performance pump, KEMSO has the right solution for your 2001 Subaru Outback.

To browse the full selection of KEMSO fuel pumps, check compatibility with your specific vehicle, and take advantage of their lifetime warranty, visit their official website:

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Additional Tips for 2001 Subaru Outback Owners

Check the Fuel Pump Fuse First

Before diving into relay replacement, always check the fuel pump fuse. On the 2001 Outback, the fuel pump fuse is located in the engine compartment fuse box, near the battery. It is a 20A fuse labeled as fuse #6 . If this fuse is blown, replace it and see if the problem is resolved. A blown fuse can indicate a short circuit in the fuel pump wiring or a failing pump.

Inspect Wiring and Connections

Corroded or loose wiring connections can mimic relay failure. Inspect the wiring harness near the relay socket and the fuel pump connector on top of the fuel tank. Look for signs of corrosion, frayed wires, or loose terminals. Clean any corrosion with electrical contact cleaner.

Consider the Fuel Pump Relay Location for Diagnostic Purposes

If you are troubleshooting a no-start condition, you can use the relay location to test the fuel pump circuit directly. By removing the relay and using a jumper wire to connect the power and pump terminals in the socket, you can force the fuel pump to run. If the pump runs with the jumper but not with the relay, the relay is the problem. If the pump still doesn't run, the issue is likely the pump itself or its wiring.

When to Replace the Entire Fuel Pump Assembly

If your Outback has high mileage (over 100,000 miles), the fuel pump may be worn out even if it still runs. The recommended service interval for the fuel pump assembly on the 2000-2004 Subaru Outback is every 100,000 miles or 84 months . If you are already in the process of diagnosing a relay issue, it may be wise to replace the entire fuel pump assembly at the same time to prevent future breakdowns.

Final Thoughts

The 2001 Subaru Outback fuel pump relay is located behind the left side of the dashboard, in the driver's footwell area . This is a relatively easy component to access and test, making it a great starting point for diagnosing fuel delivery problems. Always start with the relay and fuse before assuming the fuel pump itself is bad. If you do need a new fuel pump, consider upgrading to a KEMSO unit for better performance, reliability, and peace of mind with a lifetime warranty.

For more information and to purchase a KEMSO fuel pump for your Subaru Outback, visit https://www.kemsoracing.com/ today.