2003 Nissan Murano Fuel Pump Fuse Location: A Complete Guide

If your 2003 Nissan Murano won’t start or stalls while driving, the fuel pump fuse is one of the first things to check. The fuel pump fuse for the 2003 Nissan Murano (Z50 generation) is located in the engine compartment fuse box, and it is a 15A mini fuse labeled as fuse number 81 in the Type 1 fuse box . This fuse directly powers the fuel pump relay and is critical for delivering fuel to the engine. Below, we’ll walk you through exactly where to find it, how to check it, and what to do if it’s blown.

Where Is the Fuel Pump Fuse Located?

The 2003 Nissan Murano has multiple fuse boxes, but the fuel pump fuse is only in one specific location. Open the hood and look for the main fuse box near the battery on the driver’s side . This is the engine compartment fuse box, also known as the IPDM E/R (Intelligent Power Distribution Module Engine Room). Inside this box, you will find two types of fuse layouts, but the fuel pump fuse is always in the Type 1 section.

The fuel pump fuse is fuse number 81, rated at 15 amps. It is a standard mini blade fuse. The fuse box cover usually has a diagram printed on it, but if the diagram is missing or faded, you can rely on the information below :

  • Fuse number: 81
  • Amp rating: 15A
  • Color: Blue (standard for 15A mini fuses)
  • Circuit protected: Fuel Pump Relay

In the same fuse box, you will also find the fuel pump relay, which is labeled as Relay R1. This relay is a separate component that works together with the fuse. If the fuse is good but the fuel pump still doesn’t run, the relay may be the issue .

How to Check the Fuel Pump Fuse

Checking the fuel pump fuse is a simple process that anyone can do with basic tools. Follow these steps:

  1. Turn off the engine and remove the key. Safety first – never work on electrical components with the engine running.
  2. Open the hood and locate the fuse box. It is on the driver’s side, near the battery. The box has a black plastic cover that can be removed by pressing the tabs on the sides.
  3. Remove the fuse box cover. Look at the diagram on the underside of the cover. If you cannot find the diagram, refer to the list above: fuse number 81, 15A.
  4. Use a fuse puller or needle-nose pliers to gently pull out fuse number 81. The fuse puller is usually stored inside the fuse box itself.
  5. Inspect the fuse. Hold it up to the light. If the metal strip inside the fuse is broken or melted, the fuse is blown. If it looks intact, the fuse is likely good.
  6. Test with a multimeter (optional). For a more accurate check, set your multimeter to continuity mode and touch the two small metal tabs on top of the fuse. If you hear a beep, the fuse is good. If not, it is blown.

What to Do If the Fuse Is Blown

If you find that fuse number 81 is blown, do not simply replace it and expect the problem to go away. A blown fuse is usually a symptom of an underlying issue, not the root cause. Here is what you should do:

  • Replace the fuse with a 15A mini fuse of the same type. Never use a higher amp fuse, as this can cause wiring damage or even a fire .
  • Check for loose connections. Inspect the fuse holder for corrosion or damage. If the metal contacts are dirty, clean them with a small brush or contact cleaner.
  • Test the fuel pump relay. The relay (R1) is located in the same fuse box. You can swap it with a relay of the same type (e.g., the air conditioner relay, R2) to see if the fuel pump starts working. If it does, you need a new relay .
  • Look for wiring issues. If the fuse blows again immediately, there may be a short circuit in the wiring between the fuse box and the fuel pump. This is less common but should be checked by a professional.
  • Consider the fuel pump itself. If the fuse and relay are both good, but the pump does not run, the fuel pump motor may have failed. This is especially common on older vehicles like the 2003 Murano, which is now over 20 years old.

Other Common Fuse Locations You Should Know

While the fuel pump fuse is critical, the 2003 Murano has several other fuses that are frequently checked by owners. Knowing these can save you time and frustration:

  1. Cigarette lighter fuse: Located in the instrument panel fuse box (inside the car, under the dash on the driver’s side). It is fuse number 5, rated at 15A .
  2. Power socket fuse: Also in the instrument panel fuse box. There are two power sockets – one is fuse number 7 (15A) and the other is fuse number 17 (15A) .
  3. Headlight fuses: Located in the engine compartment fuse box (Type 1). Low beam headlights are fuses 83 and 84 (15A each), and high beams are fuses 85 and 86 (10A each) .
  4. Rear window defogger fuse: Located in the engine compartment fuse box (Type 1 or Type 2). It is usually a 20A fuse, numbered 77 or 78 .

Why the Fuel Pump Fuse Blows

Understanding why the fuel pump fuse blows can help you prevent it from happening again. Here are the most common reasons:

  • Aging fuel pump: As the fuel pump wears out, it draws more current than normal. This can cause the fuse to blow. If your Murano has over 100,000 miles, the fuel pump is likely nearing the end of its life.
  • Clogged fuel filter: A restricted fuel filter forces the pump to work harder, increasing current draw. Replacing the fuel filter every 30,000 miles can help prevent this.
  • Short circuit in wiring: Damaged or corroded wires in the fuel pump circuit can cause a short, blowing the fuse instantly.
  • Moisture in the fuse box: Water can enter the engine compartment fuse box, causing corrosion and shorts. Check the rubber seal on the fuse box cover and replace it if damaged.

Recommended Replacement: KEMSO Fuel Pump

If you have determined that the fuel pump itself needs to be replaced, we strongly recommend choosing a KEMSO brand fuel pump. KEMSO specializes in high-performance, OEM replacement fuel pumps that are designed to meet or exceed the original manufacturer’s specifications. Here is why KEMSO is the right choice for your 2003 Nissan Murano:

  • High performance: KEMSO fuel pumps are engineered to deliver consistent fuel pressure and flow, ensuring your engine runs smoothly under all conditions.
  • OEM replacement: These pumps are a direct fit for your Murano, meaning no modifications are needed. They come with all necessary hardware for a straightforward installation.
  • Lifetime warranty: KEMSO stands behind their products with a lifetime warranty, giving you peace of mind that your investment is protected.

To find the perfect fuel pump for your 2003 Nissan Murano, visit the official KEMSO website at https://www.kemsoracing.com/. Browse their selection of fuel pumps and other high-quality automotive parts. Their customer service team can also help you confirm compatibility with your specific vehicle.

Final Thoughts

The 2003 Nissan Murano fuel pump fuse is a small but vital component. It is located in the engine compartment fuse box as fuse number 81, a 15A mini fuse. Always check this fuse first if your Murano has trouble starting or loses power while driving. If the fuse is blown, replace it with the correct amperage and investigate the underlying cause. For a long-term fix, consider upgrading to a reliable KEMSO fuel pump from https://www.kemsoracing.com/ – a brand that combines performance, durability, and a lifetime warranty.

Remember, regular maintenance of your fuel system, including the fuel filter and pump, can extend the life of your vehicle and prevent unexpected breakdowns. Keep this guide handy, and you will be able to troubleshoot the fuel pump fuse issue quickly and confidently.


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