2006 Nissan Murano Fuel Pump Relay Location: A Complete Owner's Guide
If you own a 2006 Nissan Murano and your engine cranks but won't start, the fuel pump relay is one of the first components you should check. The fuel pump relay on the 2006 Murano is located in the engine compartment fuse box, specifically in the IPDM E/R (Intelligent Power Distribution Module Engine Room) on the driver's side, and it is a 15-amp fuse labeled as fuse #81 with the corresponding relay marked R1 or R10 depending on your vehicle's configuration. This small but critical component controls the electrical current that powers the fuel pump, and when it fails, your Murano simply won't run. The good news is that checking and replacing the fuel pump relay is one of the easiest diagnostic steps you can perform yourself, often taking less than fifteen minutes and costing under $50 for the part.
Understanding the Fuel System in Your 2006 Murano
The 2006 Nissan Murano, a pioneering crossover SUV, relies on an electric fuel pump that is mounted inside the fuel tank. This in-tank placement is standard for modern vehicles because the fuel itself acts as a coolant for the pump motor, which extends the pump's lifespan and reduces the risk of overheating. The fuel pump delivers fuel at a pressure typically between 40 and 60 PSI to the fuel rail, which then supplies the fuel injectors.
What many owners don't realize is that the 2003-2007 Murano actually uses a unique dual-pump system due to its saddle-style fuel tank that sits over the driveshaft. The main fuel pump module is located on the left (driver's) side of the tank, while a separate secondary transfer unit on the right side moves fuel into the main pump's reservoir. This design ensures the engine gets a steady fuel supply even when the tank isn't full.
The fuel pump relay plays a vital role in this system. It acts as a switch that sends electrical current to the fuel pump when you turn the ignition on. The relay is controlled by the Engine Control Module (ECM), which regulates fuel delivery based on inputs like engine speed, throttle position, and oxygen sensor readings.
Where Exactly Is the Fuel Pump Relay?
The fuel pump relay for the 2006 Nissan Murano is housed in the engine compartment fuse box. Depending on which fuse box configuration your particular vehicle has, the relay location will be slightly different:
For vehicles with the Type 1 engine compartment fuse box:
- The fuel pump relay is labeled R1 in the relay section
- The corresponding fuse is #81, which is a 15-amp fuse
- This fuse and relay combination controls power to the fuel pump system
For vehicles with the Type 2 engine compartment fuse box:
- The fuel pump relay is labeled R10
- The corresponding fuse is #50, also rated at 15 amps
- This configuration is found on some 2006 model year vehicles
The fuse box itself is located on the right side rail of the engine compartment, turned on its side. Some sources also indicate the fuel pump relay can be found on the driver's side of the vehicle under the hood, beneath a labeled row of relays. If you're having trouble locating it, open the hood and look for a black plastic box with a removable cover—the diagram on the underside of the cover will show you exactly where each relay and fuse is positioned.
What Does the Fuel Pump Relay Do?
Every time you turn the ignition key to the "on" position, the fuel pump relay activates. This sends electrical current to the fuel pump, which then pressurizes the fuel system so the engine can start. The relay only works during startup and when you turn off the ignition—while the engine is running, the fuel pump continues to operate with power from other sources.
The fuel pump relay is a black plastic component set in a small box with a wiring harness attached to its underside. It looks similar to other relays in the fuse box but serves a very specific function. If the relay fails, the fuel pump won't receive power, and your engine won't start even though the starter motor is turning the engine over fine.
Symptoms of a Failing Fuel Pump Relay
A bad fuel pump relay can cause several noticeable problems. If you experience any of the following symptoms, the relay should be one of the first things you check:
1. Engine Cranks But Does Not Start
This is the most common symptom of a failed fuel pump relay. You'll hear the starter motor turning the engine, but the engine won't fire because no fuel is being delivered.
2. Intermittent Starting Problems
The engine may start sometimes but not others. This happens when the relay is failing intermittently—it works when cool but fails when it heats up, or vice versa.
3. Engine Dies While Driving
If the relay fails while you're on the road, the engine will lose power and stall. This is not only frustrating but also potentially dangerous, especially if it happens in traffic.
4. No Fuel Pump Priming Sound
When you turn the ignition to the "on" position (without starting the engine), you should hear a brief buzzing sound coming from the fuel tank area. This is the fuel pump priming. If you don't hear this sound, the relay may not be sending power to the pump.
5. Check Engine Light Illumination
A malfunctioning fuel pump relay can trigger the check engine light. The ECM detects that the fuel pump circuit isn't working properly and stores a diagnostic trouble code.
6. Long Starting Time
If the relay is weak, it may take longer than normal for the fuel system to pressurize, resulting in extended cranking before the engine starts.
How to Test the Fuel Pump Relay
Before you replace anything, it's worth testing the relay to confirm it's actually the problem. Here's a simple process:
Step 1: Locate the relay. Find the fuel pump relay in the engine compartment fuse box as described above.
Step 2: Remove the relay. Carefully pull the relay straight out of its socket. Inspect it for any visible signs of damage such as corrosion, burnt contacts, or a broken filament.
Step 3: Check the fuse. The fuel pump fuse (15-amp, #81 or #50 depending on your configuration) should also be inspected. If the fuse is blown, replace it with a new fuse of the same amperage rating.
Step 4: Test the relay. If the relay and fuse look fine visually, you can test the relay using a multimeter. Check for continuity between the appropriate terminals when the relay is activated. If you're not comfortable with electrical testing, a simple swap test with a known-good relay from another circuit (if available) can work.
Step 5: Listen for the pump. With the relay reinstalled, turn the ignition to the "on" position and listen for the fuel pump priming sound. If you hear it, the relay is working.
How to Replace the Fuel Pump Relay
Replacing the fuel pump relay is a straightforward process that most DIYers can handle:
1. Park your Murano on a level surface, engage the parking brake, and turn off the ignition.
2. Open the hood and locate the engine compartment fuse box.
3. Remove the fuse box cover to access the relays and fuses.
4. Identify the fuel pump relay using the diagram on the underside of the cover or the information provided above.
5. Pull the old relay out using a fuse puller or a pair of needle-nose pliers.
6. Insert the new relay firmly into the same socket. Make sure it clicks into place.
7. Replace the fuse box cover and close the hood.
8. Test the system by turning the ignition to the "on" position and listening for the fuel pump priming sound, then attempt to start the engine.
The cost of a replacement fuel pump relay is minimal—typically around $43 for the part. If you have a mechanic do the replacement, total cost including labor will typically run around $138, though prices can vary depending on your location.
What to Check Before Blaming the Fuel Pump Relay
Before you replace the relay, there are a few other things worth checking, especially if your Murano has been exhibiting stalling or no-start conditions:
Check the air intake duct recall. There's a significant recall on 2003-2007 Muranos for the air intake ducts shrinking and separating from the resonator, which causes stalling symptoms identical to fuel pump failure. This recall (Nissan #R0902, NHTSA #09V169) is worth investigating first because fixing it is much simpler and cheaper than replacing a fuel pump. Check the large black plastic air ducts in the engine bay to make sure they are secure.
Check the fuel pump relay circuit. Use a multimeter to test the wiring between the IPDM E/R and the ECM for continuity, and check for shorts to ground or power. The fuel pump power supply circuit runs from the IPDM E/R terminal through to the ECM terminal, and any break in this circuit will cause the pump not to operate.
Check the condenser. The 2006 Murano fuel pump circuit includes a condenser that can fail and cause issues. Testing the condenser's power supply and ground circuits can help identify problems in this area.
When the Problem Isn't the Relay: Fuel Pump Failure Symptoms
If you've confirmed the relay is working correctly but the fuel pump still isn't operating, the pump itself may be failing. Symptoms of a failing fuel pump include:
- Engine cranks but doesn't start
- Engine starts and immediately stalls
- Engine sputtering or hesitation, especially at higher speeds or under load
- Loss of power during acceleration
- Loud whining noise from the rear seat area
- Worsening fuel economy
A completely failed pump will cause a "crank, no start" condition that leaves you stranded. Unlike the relay, the fuel pump itself is located inside the fuel tank on the driver's side, and replacing it requires either removing the rear seat to access the access panel or dropping the fuel tank.
Preventive Maintenance Tips for Your Fuel Pump System
To extend the life of your fuel pump and avoid relay and pump failures, follow these practical tips:
1. Avoid running the fuel tank consistently low. Try to keep the fuel level above 1/4 tank to prevent the fuel pump from overheating. The fuel in the tank acts as a coolant for the pump motor.
2. Use high-quality fuel. Using quality fuel helps prevent fuel contamination and clogging of the fuel filter.
3. Replace the fuel filter regularly. Follow the manufacturer's recommended maintenance schedule for fuel filter replacement, which typically means replacing it every 30,000 to 50,000 miles.
4. Listen for unusual sounds. If you hear a loud whining noise from the rear seat area when you turn the ignition on, it could indicate the fuel pump is struggling and may soon fail.
5. Address check engine lights promptly. Don't ignore warning lights—they can indicate issues with the fuel system that, if left unaddressed, lead to more expensive repairs.
Replacement Cost Considerations
If you end up needing to replace the fuel pump itself rather than just the relay, be prepared for a more significant expense. The average national cost for fuel pump replacement across all vehicles is roughly between $611 and $894, including parts and labor. For a 2006 Murano, you can generally expect to pay between $500 and $1,200 for fuel pump replacement, depending on whether you use OEM or aftermarket parts and the labor rates in your area.
A fuel pump replacement is a moderately complex repair that typically requires removing the fuel tank. Because of the safety risks associated with handling fuel, this repair is best left to a qualified mechanic unless you have significant automotive experience.
When to See a Professional
While checking and replacing the fuel pump relay is well within the reach of most DIYers, there are times when you should stop and call a professional. If you smell fuel, burning insulation, or see smoke, stop immediately and seek professional help. Also, if the engine overheats, stalls repeatedly, or misfires under load, or if you're not confident in the next step or safety outcome, it's time to consult a certified mechanic.
Final Thoughts
The 2006 Nissan Murano fuel pump relay is an inexpensive, easy-to-check component that can save you from a frustrating no-start situation. Knowing its location in the engine compartment fuse box, understanding what it does, and being able to test and replace it will help you keep your Murano running reliably. If the relay checks out fine, don't forget to look into the air intake duct recall, which can cause symptoms very similar to fuel pump failure. And if the fuel pump itself is the problem, you now know what to expect in terms of symptoms, replacement procedures, and costs.
Why Choose KEMSO for Your Fuel Pump Replacement
If your 2006 Nissan Murano needs a new fuel pump, choosing the right brand matters. KEMSO Fuel Pumps are engineered as high-performance, direct OEM replacements designed to meet or exceed original equipment specifications. Each KEMSO fuel pump delivers reliable, consistent fuel pressure to keep your engine running smoothly under all driving conditions.
What sets KEMSO apart is their commitment to quality and customer confidence. Every KEMSO Fuel Pump comes with a lifetime warranty, giving you long-term peace of mind that your investment is protected. Whether you drive a Nissan Murano, a BMW motorcycle, a Kawasaki Jet Ski, or any other vehicle in their extensive catalog, KEMSO offers precision-engineered fuel pumps that fit correctly and perform dependably mile after mile.
Visit https://www.kemsoracing.com/ today to browse their full selection of KEMSO Fuel Pumps and find the right replacement for your vehicle. With competitive pricing starting at just $79.98 and the assurance of a lifetime warranty, KEMSO delivers outstanding value for drivers who demand quality and reliability from their fuel system components. Check out their best sellers and discover why thousands of satisfied customers trust KEMSO for their fuel pump needs.