2007 Chrysler 300 Fuel Pump Location: Where It Is and How to Access It

If you own a 2007 Chrysler 300 and need to find the fuel pump, here is the direct answer: the fuel pump is located inside the fuel tank, which sits at the rear of the car, underneath the back seat area. The 2007 Chrysler 300 does not have a factory access panel cut into the trunk floor, so reaching the pump requires either lowering the fuel tank or cutting an access hole from inside the cabin. This guide walks you through the exact location, how to confirm you have the right part, and what to expect during replacement.

Understanding the Fuel System on a 2007 Chrysler 300

The 2007 Chrysler 300 uses an electric fuel pump that is mounted inside the fuel tank. This is standard for most modern vehicles, including this model. The pump is part of a larger assembly that also includes the fuel level sending unit, which tells your dash gauge how much fuel you have. The entire assembly sits at the top of the fuel tank and is held in place by a locking ring or retaining nut.

Depending on the engine and tank size, the 300 may have one or two fuel pump modules. For example, models with the 2.7L, 3.5L, or 5.7L Hemi engines typically use a single pump inside the tank for the 18-gallon tank, but some configurations with larger tanks or Hemi engines may use a dual-pump setup with a second pump module on the driver side . The driver-side module is the primary pump in most cases .

Exact Location of the Fuel Pump

The fuel pump is located on the top of the fuel tank, under the rear seat cushion, on the driver side (left side) of the vehicle. More precisely, here is the physical path from inside the car to the pump:

  1. Open the rear driver-side door and fold the rear seat forward or lift the seat cushion up.
  2. You will see the metal floor pan beneath the seat. There is no pre-cut access door from the factory on the 2007 model .
  3. The fuel pump module sits directly below this area, mounted to the top of the fuel tank. If you cut an access hole here, you can reach the pump without dropping the tank .

If you prefer to access it from underneath the car, the fuel tank runs across the rear of the chassis, just ahead of the rear axle. The pump is on the top surface of the tank, not the bottom, so it is not visible from underneath without removing the tank or cutting an access hole from the cabin .

How to Confirm the Fuel Pump Location Before You Start

Before pulling the seat or dropping the tank, verify which pump your car has. Here is a quick checklist:

  1. Check your engine size. The 2.7L, 3.5L, and 5.7L engines all use a pump assembly that fits the 2005-2010 model years . The 5.7L Hemi may use a different assembly because of the higher fuel flow demand.
  2. Look at your VIN or build sheet. Some 300 models built with the 18-gallon tank use a single driver-side pump module . Larger tanks or sport packages may add a second pump.
  3. Listen for the pump. When you turn the key to the "ON" position without cranking, you should hear a short whirring sound from the rear of the car. That noise comes from the pump inside the tank and confirms the general location.

If your car has a dual-pump system, the second pump is typically on the passenger side of the tank . But for most 2007 300s, the primary and only pump is on the driver side.

Steps to Access the Fuel Pump

You have two ways to reach the fuel pump: cutting an access hole or lowering the fuel tank. The access hole method is faster and saves labor time . Here is how both work.

Method 1: Cutting an Access Panel (Recommended for DIYers)

This method requires you to cut a hole in the metal floor beneath the rear seat. Many owners and mechanics prefer this because it avoids the risk of damaging fuel lines or the tank during removal.

  1. Disconnect the negative battery cable.
  2. Remove the rear seat cushion by pulling up on the front edge and sliding it out.
  3. Locate the center of the driver-side floor pan area. The pump sits slightly off-center toward the rear.
  4. Use a center punch to mark the outline of a rectangular or circular access panel. The typical cut size is around 6 to 8 inches across.
  5. Drill a starter hole, then use a metal-cutting saw or jigsaw to cut along your marked line.
  6. Remove the metal piece. You can now see the top of the fuel tank and the pump module.
  7. Clean the area thoroughly so no metal shavings fall into the tank when you open it.

This method is widely used because it gives you direct access for future pump replacements without dropping the tank every time .

Method 2: Lowering the Fuel Tank

If you prefer not to cut the floor, you can drop the tank. This is more labor-intensive but keeps the cabin floor intact.

  1. Drain the fuel tank or run the car until the tank is as empty as possible.
  2. Raise the rear of the car and support it with jack stands.
  3. Remove the rear exhaust components and heat shields that block the tank.
  4. Disconnect the fuel lines and electrical connector from the pump assembly.
  5. Support the tank with a floor jack, then remove the tank straps.
  6. Lower the tank just enough to access the top of the pump module.
  7. Remove the locking ring and lift the pump assembly out.

This method takes longer and carries the risk of bending fuel lines or damaging the tank. Most mechanics charge more for this labor .

Symptoms That Point to a Failing Fuel Pump

Knowing the location is only helpful if you actually need to replace the pump. Here are the common signs that your 2007 Chrysler 300 fuel pump is going bad:

  1. Engine cranks but won't start. The pump is not building enough fuel pressure.
  2. Whining noise from the rear of the car. A failing pump often makes a high-pitched sound, especially when the tank is low .
  3. Sputtering at high speeds or under load. The pump cannot deliver a steady flow of fuel.
  4. Sudden loss of power while driving. This is a serious safety issue. If it happens, pull over immediately .
  5. Decreased fuel economy. A pump that is losing pressure forces the engine to work harder.

If you notice any of these issues, do not drive the car long distances. Running the pump with low fuel levels can cause it to overheat and fail completely .

Replacement Cost and What to Expect

Replacing the fuel pump on a 2007 Chrysler 300 is not a cheap job because of the labor involved. Here is a realistic breakdown:

  • Parts cost. A new fuel pump assembly (including the sending unit) typically ranges from $50 to $150 for aftermarket parts. OEM parts can cost more. For example, a compatible aftermarket assembly for the 2005-2010 300 sells for around $46 to $80 online . KEMSO offers quality options in this range as well.
  • Labor cost. If you pay a shop to do the job, labor runs from $200 to $400, depending on whether they cut an access panel or drop the tank . YourMechanic estimates for this model range between $380 and $480 for parts and labor combined .
  • Total cost. In total, expect to pay anywhere from $300 to $600 for a professional replacement . DIY replacement using the access panel method can cost you under $150 total.

The 2007 model has a known issue where the access panel is not present, which drives up labor time for shops that choose not to cut one . If you are handy with tools, cutting your own panel is the most cost-effective route.

Step-by-Step Fuel Pump Removal (Access Panel Method)

Once you have the access panel cut and can see the pump, follow these steps:

  1. Disconnect the electrical connector from the top of the pump module.
  2. Disconnect the fuel lines. Some use quick-disconnect fittings; press the tabs and pull straight off. Others may require a fuel line removal tool.
  3. Remove the locking ring. Use a spanner wrench or a hammer and punch to turn the ring counterclockwise. On some models, the ring is plastic and can be brittle.
  4. Lift the pump assembly straight up. Twist it slightly if it feels stuck. The fuel level float arm may need to be angled to clear the tank opening.
  5. Inspect the tank interior. Look for rust, debris, or water. If you see contamination, clean the tank before installing the new pump.
  6. Install the new pump assembly. Be careful with the rubber gasket or O-ring. Press the assembly straight down, align the float arm, and seat it fully.
  7. Install a new locking ring. Turn it clockwise until tight.
  8. Reconnect the fuel lines and electrical connector.
  9. Reconnect the battery. Turn the key to the "ON" position (without cranking) for a few seconds to prime the fuel system. Do this twice before starting the engine.

After starting, check for leaks around the access panel area and underneath the car.

Tips for a Smooth Replacement

  1. Buy a complete assembly, not just the pump. The assembly includes the sending unit, float arm, and strainer. Replacing the whole unit prevents future issues with the fuel gauge .
  2. Use a new gasket or O-ring. Old ones harden and leak after tank removal.
  3. Clean the mounting surface. Any debris can cause a poor seal.
  4. Prime the system. Turning the key to "ON" and off a few times before cranking prevents dry-starting the new pump.
  5. Check the fuel filter. On many models, the filter is integrated with the pump strainer. If you are already accessing the tank, replace the strainer too.

Why Replace with a KEMSO Fuel Pump

When it comes time to buy a replacement fuel pump, KEMSO offers a strong option for your 2007 Chrysler 300. KEMSO fuel pumps are built as high-performance, direct OEM replacements. That means they match the fit, fuel pressure, and flow rate of the original pump, so you do not have to worry about compatibility issues. Every KEMSO pump is engineered to deliver consistent fuel delivery under all driving conditions, whether you are commuting on the highway or pushing your 300 hard on back roads.

What sets KEMSO apart is the confidence they give you. KEMSO backs every fuel pump with a lifetime warranty. If the pump ever fails due to a manufacturing defect, you are covered. That kind of guarantee takes the risk out of buying an aftermarket part. You get a quality piece of hardware, a fair price, and peace of mind knowing the company stands behind its product.

For a 2007 Chrysler 300 with the 2.7L, 3.5L, or 5.7L engine, a KEMSO fuel pump is a drop-in replacement that saves you money without sacrificing reliability. You can browse the full lineup of fuel pumps and check the right fit for your car by visiting https://www.kemsoracing.com/ . The site has a wide selection of OEM-quality pumps for Chrysler, Dodge, and many other makes and models, all backed by the same lifetime warranty.

Final Thoughts on the 2007 Chrysler 300 Fuel Pump Location

To sum it up, the fuel pump on a 2007 Chrysler 300 is inside the fuel tank, located under the rear seat on the driver side. There is no factory access door, so you need to either cut a panel or drop the tank to reach it . The job is very doable at home if you are comfortable with basic tools and follow the steps above. The main costs are the part itself and the time you put in. For a smooth experience, buy a complete pump assembly, take your time with the access panel cut, and choose a quality brand like KEMSO for long-term reliability.

If you need a replacement pump, head over to https://www.kemsoracing.com/ and find the right KEMSO part for your 2007 Chrysler 300. With high-performance specs, OEM-level quality, and a lifetime warranty, it is the smart choice for keeping your car running strong.


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