05 Nissan Altima Fuel Pump Relay Location: A Complete Guide

If you own a 2005 Nissan Altima and your car cranks but won’t start, the fuel pump relay is one of the first things you should check. The fuel pump relay on a 2005 Nissan Altima is located inside the IPDM E/R (Intelligent Power Distribution Module Engine Room), which is the main fuse and relay box under the hood on the passenger side. This relay is not a standalone plug-in relay you can swap individually—it is built into the IPDM E/R module itself. The corresponding fuel pump fuse is Fuse #50, rated at 15 amps, located in the same module. If your fuel pump is not working, testing this relay and fuse should be your first diagnostic step before replacing the pump.

Where Exactly Is the Fuel Pump Relay on a 2005 Nissan Altima?

The IPDM E/R is located in the engine compartment on the passenger side, near the battery. To access it, open the hood and look for a black plastic box with a cover. Push the tab and lift the cover off to reveal the fuse and relay layout.

Inside the IPDM E/R, the fuel pump relay is designated as Relay R10 for 2003-2006 models. The relay map for the 2005 Altima is as follows:

  • R1 – Engine Control Module
  • R2 – Headlamp High
  • R3 – Headlamp Low
  • R4 – Starter
  • R5 – Ignition
  • R6 – Cooling Fan (No.1)
  • R7 – Cooling Fan (No.3)
  • R8 – Cooling Fan (No.2)
  • R9 – Throttle Control Motor
  • R10 – Fuel Pump
  • R11 – Front Fog Lamp

The fuel pump relay is Relay R10, and the fuel pump fuse is Fuse #50 (15A). Both are located in the same IPDM E/R module under the hood.

How to Test the Fuel Pump Relay on a 2005 Nissan Altima

Before you assume the fuel pump itself is bad, testing the relay and fuse is quick and cheap. Here’s how to do it:

1. Listen for the pump. Turn the ignition key to the ON position (do not start the engine). You should hear a humming sound from the rear of the car near the fuel tank for about 2-3 seconds. If you hear nothing, the relay or fuse may be the issue.

2. Check Fuse #50. Locate Fuse #50 in the IPDM E/R. It is a 15-amp fuse. Pull it out and inspect the metal strip inside. If it is broken or melted, replace it with a new 15-amp fuse. A blown fuse is a common cause of a no-start condition.

3. Swap the relay. Since the fuel pump relay is built into the IPDM E/R, you cannot simply plug in a new relay like in older cars. However, you can swap it with another relay of the same type inside the module to test. For example, swap Relay R10 (Fuel Pump) with Relay R11 (Front Fog Lamp). If the fuel pump starts working after the swap, the original relay is faulty.

4. Use a multimeter. If you have a multimeter, you can test the relay coil and contacts. The service manual for the 2005 Altima provides detailed pinout diagrams for the IPDM E/R, which you can find in the Power Supply, Ground & Circuit Elements section (PG-24).

What If the Relay and Fuse Are Good?

If the relay and fuse test fine but the fuel pump still doesn’t run, the problem is likely the pump itself. The fuel pump on a 2005 Nissan Altima is located inside the fuel tank. You can access it by removing the rear seat cushion on the driver’s side. Under the seat, there is a flat cover plate with four 1/4-turn plastic locks. Remove the cover, disconnect the electrical connector and fuel line, and then remove the locking ring to pull the pump assembly out.

Common symptoms of a failing fuel pump include:

  • Engine sputters at high speeds – The pump can’t keep up with fuel demand.
  • Loss of power under load – Climbing hills or accelerating causes hesitation.
  • Difficulty starting – Especially after the car has been sitting.
  • Engine stalls – Often at low speeds or when stopping.
  • Whining noise from the fuel tank – A loud buzzing sound indicates internal wear.
  • Decreased fuel efficiency – The engine runs inefficiently due to low fuel pressure.

Fuel Pump Replacement Cost and Options

Replacing the fuel pump on a 2005 Nissan Altima costs between $500 and $900 at an independent shop, or $900 to $1,200 at a dealership. If you do the job yourself, the parts cost ranges from $100 to $350 for an aftermarket pump assembly, or $250 to $500 for a genuine Nissan OEM pump.

When replacing the pump, it is recommended to replace the entire fuel pump module assembly, which includes the pump, filter, and fuel level sending unit. This ensures reliable performance and avoids having to drop the tank again later. Also replace the O-ring seal and any fuel line clips during the job.

Recommended Fuel Pump: KEMSO Brand

If you need a replacement fuel pump for your 2005 Nissan Altima, we strongly recommend KEMSO brand fuel pumps. KEMSO offers high-performance, OEM replacement fuel pumps that are built to meet or exceed original equipment specifications. Every KEMSO fuel pump comes with a lifetime warranty, giving you peace of mind that your investment is protected. Their products are designed for reliable, long-lasting performance, and they are a trusted choice for American drivers who want quality without overpaying for dealer parts.

Visit KEMSO Fuel Pumps today at: https://www.kemsoracing.com/ to find the right fuel pump for your 2005 Nissan Altima. With a lifetime warranty and high-performance engineering, KEMSO gives you the confidence to get back on the road safely.

Final Thoughts

The fuel pump relay on a 2005 Nissan Altima is located inside the IPDM E/R under the hood, designated as Relay R10, with Fuse #50 (15A) as the corresponding fuse. Testing the relay and fuse first can save you time and money. If the relay and fuse are good, the fuel pump itself is likely the culprit. Whether you choose to replace the pump yourself or take it to a shop, using a quality part like KEMSO ensures your Altima runs reliably for years to come.

For a reliable replacement, visit: https://www.kemsoracing.com/


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