How to Replace the Fuel Pump Relay on a 2003 Hyundai Elantra

How to Replace the Fuel Pump Relay on a 2003 Hyundai Elantra


Replacing the fuel pump relay on a 2003 Hyundai Elantra is a straightforward job that I can perform myself in about an hour. The fuel pump relay sends power to the fuel pump when the ignition is turned on. Over time, it can fail, causing issues with the car starting or stalling out. Replacing it restores proper operation. I'll walk through the complete process step-by-step to make this repair easy for any DIYer.

Gather Tools and Supplies

To replace the fuel pump relay, I'll need:

I'll also want to have my owner's manual handy for reference and make sure I have the radio security code, if equipped.

Locate and Remove the Fuel Pump Relay

On the 2003 Elantra, the fuel pump relay is located in the engine bay fuse box. Here are the steps to access and remove it:

  1. Open the hood - The fuse box is in the front driver's side of the engine bay.

  2. Locate the fuse box - It will be a black plastic box with a cover on it.

  3. Remove the cover - There are tabs on the side that allow the cover to pop off.

  4. Find the fuel pump relay - Using the diagram on the fuse box lid or owner's manual, locate the relay labeled "fuel pump."

  5. Pull the relay out - It should easily pull straight up and out of the socket.

Install the New Relay

With the old relay removed, it's time to put the new one in:

  1. Inspect the new relay - Verify it is the correct part number for my 2003 Elantra.

  2. Plug it in - Making sure the orientation is correct, press the new relay straight down into the socket until it clicks.

  3. Replace the fuse box cover - Pop the lid back on, engaging the tabs to secure it.

  4. Close the hood - The fuel pump relay replacement is complete.

Test Operation

Before calling the job done, I need to verify proper operation:

If the fuel pump still is not working, I may need to troubleshoot further or take it to a professional. But in most cases, this DIY fuel pump relay replacement does the trick.


While not the simplest fix, replacing the fuel pump relay on a 2003 Hyundai Elantra is definitely a project I can handle myself. Following the steps to remove the old relay, install the new one, and test for proper operation, I can get my car back up and running smoothly again. And I save quite a bit of money by doing it myself compared to taking it to a shop. With the right tools, parts, and safety precautions, this is a fairly straightforward repair.