2007 Toyota Yaris Fuel Pump Fuse: Location, Diagram, and Replacement Guide

The bottom line up front: On a 2007 Toyota Yaris (XP90 generation), the fuel pump fuse is a 20-amp fuse labeled "EFI" located in the engine compartment fuse box on the right side (driver's side in left-hand drive models) near the battery. If your Yaris cranks but won't start, or if the fuel pump isn't getting power, this fuse is the first thing you should check. This guide walks you through locating it, identifying a blown fuse, and replacing it safely. We'll also cover why a failing fuel pump may be the real culprit and when to consider a replacement.

Why the Fuel Pump Fuse Matters

The fuel pump fuse protects the electrical circuit that powers the fuel pump. It's a small, inexpensive component that does a big job. When it blows, it interrupts power to the fuel pump, and your engine won't get the fuel it needs to run. The 2007 Yaris has two fuse boxes: one inside the cabin under the dashboard, and one under the hood in the engine compartment . The fuel pump fuse lives in the engine bay box, not the interior one.

Understanding which fuse controls the fuel pump saves you time and frustration. If you're chasing an electrical gremlin like a no-start condition or a fuel pump that won't prime when you turn the key, checking this fuse should be at the top of your diagnostic list.

Where Is the Fuse Box in the Engine Compartment?

Open the hood and look to the right side of the engine compartment (the passenger side in most US-market vehicles). The fuse box is a black plastic case, usually secured near the battery or mounted against the fender wall . It houses the high-amperage fuses and relays for heavy-duty systems like the starter motor, alternator, and fuel pump .

To access it:

  1. Open the hood fully and prop it securely.
  2. Locate the black rectangular fuse box near the battery.
  3. Press the release tabs on the sides and lift the cover off.
  4. Set the cover aside. The underside of the cover typically has a diagram showing fuse positions and ratings.

This engine bay box is where you'll find the fuel pump fuse, so don't waste time searching the cabin fuse panel under the dash for this one.

The EFI Fuse: Your Fuel Pump Fuse

In the 2007 Toyota Yaris, the fuse that powers the fuel pump is labeled "EFI" (Electronic Fuel Injection). It's a 20-amp fuse located in the engine compartment fuse box . The EFI fuse supplies power not only to the fuel pump but also to the engine control unit and the fuel injection system . Here's what the factory service information shows for this fuse:

  • Fuse number: 3
  • Fuse name: EFI
  • Amperage: 20A
  • Protected circuit: Multiport fuel injection system / sequential multiport fuel injection system

When this fuse blows, you may experience symptoms like:

  1. The engine cranks but won't start.
  2. The fuel pump doesn't prime when you turn the key to the "ON" position.
  3. The car stalls while driving and won't restart.

A quick visual check of the fuse can confirm whether it's blown. Pull it out and look through the clear plastic housing. If the metal strip inside is broken or melted, the fuse is blown and needs replacement.

Step-by-Step: Checking and Replacing the Fuel Pump Fuse

Before you start, make sure the ignition is off and the key is removed from the ignition switch. Safety is non-negotiable when working with your car's electrical system .

Step 1: Locate the fuse box. Open the hood and find the fuse box on the right side of the engine compartment near the battery .

Step 2: Remove the fuse box cover. Press the tabs and lift the cover. Look for a fuse puller clipped inside the cover, or use a pair of needle-nose pliers.

Step 3: Find the EFI fuse. Refer to the diagram printed on the underside of the cover or the one in the owner's manual. In the 2007 Yaris, the EFI fuse is number 3 in the engine compartment box . It's a 20-amp fuse.

Step 4: Pull the fuse. Use the fuse puller or pliers to grasp the fuse firmly and pull it straight out. Give it a visual inspection. A blown fuse will have a visibly broken filament inside .

Step 5: Replace with the correct amperage. Always replace a blown fuse with one of the same amperage rating. For the EFI fuel pump fuse, that's 20 amps. Using a higher-rated fuse can cause wiring damage or fire .

Step 6: Reinstall and test. Push the new fuse firmly into the slot. Reinstall the fuse box cover. Turn the ignition to the "ON" position and listen for the fuel pump to prime. If it doesn't, move on to further diagnostics.

If the new fuse blows immediately, you likely have a short circuit or a failing component — don't just keep replacing fuses. That's a red flag for a deeper issue .

What Else Can Cause the Fuel Pump to Lose Power?

If the EFI fuse isn't the culprit, or if it keeps blowing, there are other components to check. The fuel pump relay is a common suspect. In the 2007 Yaris, the fuel pump relay is located in the engine compartment fuse box, and it's the #9 relay . This relay controls power delivery to the fuel pump. If the relay fails, the pump won't get voltage even with a good fuse.

Other potential issues include:

  1. Wiring problems. A short or open circuit in the wiring between the relay and the pump.
  2. A failing fuel pump. If the pump draws too much current, it can blow the fuse. In some reported cases, a blown EFI fuse was traced to faulty oxygen sensors or other components sharing the same circuit .
  3. Engine control unit (ECU) issues. The ECU controls the relay, and a failure here can prevent the pump from running.

If you've confirmed the fuse and relay are good but the pump still has no power, the fuel pump itself may need replacement.

When to Replace Your Fuel Pump

If the fuel pump is the source of your trouble, you may notice these warning signs before a complete failure:

  1. Whining noise from the fuel tank area. A loud, high-pitched sound coming from the rear of the car when the engine runs.
  2. Hard starting. The engine cranks longer than usual before firing up.
  3. Sputtering at high speeds. The car hesitates or surges, especially under heavy load.
  4. Decreased fuel efficiency. The engine runs rich or lean due to inconsistent fuel pressure.
  5. Engine stalls. The car dies while driving, especially in hot weather.

If you're replacing the fuel pump, it's often worth replacing the fuel filter at the same time to ensure clean fuel reaches the new pump.

Consider a Quality Aftermarket Fuel Pump

If it's time to replace your fuel pump, you want a unit that performs like the original and lasts. KEMSO offers high-performance fuel pumps that are designed as OEM replacements for a wide range of vehicles, including the Toyota Yaris. Here's what you need to know about KEMSO products:

  • High performance: KEMSO fuel pumps are built to meet or exceed factory specifications, ensuring reliable fuel delivery under all driving conditions.
  • OEM replacement: They're designed to drop into your vehicle with no modifications, providing a direct fit.
  • Lifetime warranty: KEMSO stands behind their products with a lifetime warranty, giving you peace of mind that your investment is protected.

Whether you're a DIY mechanic or a professional technician, choosing a dependable aftermarket pump saves you money while delivering the reliability you need. You can browse KEMSO's full lineup of fuel pumps and other performance parts at kemsoracing.com.

Battery Disconnect and Other Safety Tips

Before working on any electrical component, disconnect the negative battery cable to prevent accidental short circuits . This is especially important if you're removing the fuel tank or working near fuel lines.

Also, keep a few spare fuses in your glove box. Fuses are cheap, and having the right ones on hand can save you a tow. If you need to replace more than one fuse, carry a variety of amperages — 10, 15, 20, and 30 amps are the most common in the Yaris .

Final Word on the 2007 Yaris Fuel Pump Fuse

To recap: the 2007 Toyota Yaris fuel pump fuse is the 20-amp EFI fuse located in the engine compartment fuse box . If your car won't start or the fuel pump doesn't run, check this fuse first. If it's blown, replace it with the same amperage. If it blows again, you have an underlying issue — suspect the relay, wiring, sensors, or the fuel pump itself .

And when it's time to swap in a new fuel pump, consider a KEMSO high-performance replacement. Backed by a lifetime warranty and built to OEM standards, KEMSO pumps are a smart choice for keeping your Yaris on the road. Visit https://www.kemsoracing.com/ to explore their products.

Keep this guide handy, and you'll be able to diagnose and fix your fuel pump fuse problem with confidence.


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