2007 Chrysler Aspen Fuel Pump Removal: Step-by-Step Guide

If you own a 2007 Chrysler Aspen and need to remove the fuel pump, the short answer is this: the fuel pump sits inside the fuel tank, and on most 2007 Aspen models you can reach it through an access panel in the rear cargo floor without dropping the tank. However, some sources note that certain models may require lowering the fuel tank completely, so you should verify which setup your specific vehicle has before starting. The job involves relieving fuel pressure, disconnecting electrical and fuel lines, and carefully lifting the pump assembly out. It is a moderately difficult job that most DIYers with basic mechanical skills can handle in about two to three hours, but you must take serious safety precautions when working with gasoline.

What You Need to Know Before Starting

The 2007 Chrysler Aspen uses an electric fuel pump that is integrated into the fuel-sending unit assembly. This entire assembly sits inside the fuel tank and is not mounted in the engine bay. The pump supplies pressurized gasoline to each fuel injector in the engine, and it is powered by a compact electric motor. A pressure regulator controls the output, and fuel filtration happens either through a pickup screen inside the tank or through an external replaceable filter.

Key facts about the fuel pump on your Aspen:

  • Location: Inside the fuel tank, accessed through the rear cargo area
  • Access method: Floor panel/cover in the rear cargo area, behind or near the rear seat
  • Engine compatibility: 3.7L, 4.7L, and 5.7L V8 engines
  • Part number reference: E7184M, 5135549AA, 5135549AC, RL135549AC

Signs You Need to Remove the Fuel Pump

Before you pull the pump out, you want to be sure it is actually the problem. A failing fuel pump on the Aspen typically shows one or more of these symptoms:

  1. Car won't start or stalls unexpectedly. A failed pump prevents fuel from reaching the engine, which may cause stalling or a no-start condition.
  2. Whirring or humming noise from the fuel tank. As the pump degrades, it often makes a noticeable whining sound coming from the rear of the vehicle. If you hear this, pump failure is often imminent.
  3. Check engine light comes on. A slowly failing pump reduces fuel pressure and volume, which throws off the air-fuel ratio and triggers the warning light.
  4. Engine hesitation or surging. An erratic fuel supply can cause the engine to hesitate, surge, or lose power, especially during acceleration or under load.

If you experience any of these issues, testing the fuel pressure with a gauge can confirm whether the pump is the culprit before you begin removal.

Tools and Materials You Will Need

Gather everything before you start. You will need:

  • Replacement fuel pump module (with float arm and sealing ring included)
  • Fuel line disconnect tool (quick-connect style)
  • Socket set with extensions
  • Screwdrivers (flathead and Phillips)
  • Pliers
  • Shop towels or rags
  • Safety glasses
  • Nitrile gloves
  • A fuel-safe container for any residual fuel
  • A floor jack and jack stands (only if you need to lower the tank)
  • A fuel tank lock ring tool (recommended if you must remove the tank)

Safety First: Critical Precautions

Working on a fuel system carries real risks. Fire and inhalation hazards are the two biggest concerns. Follow these steps without exception:

  1. Work in a well-ventilated area. An open garage with the door fully up is ideal. Stay away from any ignition sources, pilot lights, or sparks.
  2. Relieve the fuel pressure. Locate the fuel pump fuse in the fuse box and pull it out. Then crank the engine briefly until it stalls. This releases the pressure in the fuel lines.
  3. Disconnect the negative battery cable. This prevents any electrical sparks while you work near fuel components.
  4. Remove the fuel cap. This helps relieve any remaining pressure in the tank.
  5. Keep a fire extinguisher nearby. It is a simple step that could prevent a disaster.

Step-by-Step Fuel Pump Removal Process

The exact procedure depends on whether your Aspen has an access panel in the cargo floor or requires tank removal. Here is how to handle both situations.

Step 1: Confirm Your Access Method

On most 2007 Chrysler Aspen models, there is a plastic floor panel or cover in the rear cargo area, usually behind or near the rear seat. Lift the carpeting or floor cover to expose this panel. If you find an access plate, you are in luck—you can skip the tank removal entirely.

However, some sources indicate that the 2007-2009 Durango and Aspen do not have an access panel under the rear seat, and the fuel tank must be removed to access the pump. Verify your specific vehicle before committing to a procedure. Check your owner's manual or consult a service manual if you are unsure.

Step 2: Access the Fuel Pump Module

If you have an access panel:

  1. Remove the floor cover or carpeting over the access area.
  2. Lift or remove the access plate to expose the pump module.
  3. You should now see the top of the fuel pump assembly, including the electrical connector and fuel lines.

If you need to lower the tank:

  1. Siphon as much fuel out of the tank as possible. This reduces the weight and makes the tank easier to handle.
  2. Support the tank with a transmission jack or a floor jack with a wide pad.
  3. Disconnect the filler neck, EVAP lines, and electrical connectors from the tank.
  4. Lower the tank slowly and carefully. Have a helper assist you if possible.
  5. Once the tank is down, you can access the fuel pump lock ring from the top of the tank.

Step 3: Disconnect the Fuel Lines and Electrical Connections

Now that you can see the pump, you need to disconnect everything attached to it:

  1. Remove the fuel pump supply and return hoses. Use a quick-connect disconnect tool to release the fittings without damaging them.
  2. Disconnect the EVAP system hoses from the pump assembly.
  3. Unplug the electrical connections to the pump. Note the orientation so you can reconnect them correctly later.

Step 4: Remove the Lock Ring and Lift Out the Pump

The fuel pump is held in place by a large plastic or metal lock ring:

  1. Use a fuel tank lock ring tool or a blunt punch and hammer to rotate the ring counterclockwise. A dedicated lock ring tool is strongly recommended to avoid breaking the ring.
  2. Once the ring is loose, lift it off.
  3. Carefully lift the fuel pump assembly straight up out of the tank. Tilt it slightly as you pull to allow the float arm to clear the opening.
  4. Have a shop towel ready to catch any residual fuel that drips from the assembly.

Step 5: Transfer Components to the New Pump

Before you install the new pump, transfer any reusable parts from the old assembly:

  1. Remove the pickup screen or strainer from the old pump and attach it to the new one if the new unit does not include one.
  2. Check the rubber seal or gasket on the tank opening. Replace it if it shows signs of wear or cracking.
  3. Inspect the float arm for damage. Ensure it moves freely through its full range of motion.

Installing the New Fuel Pump

Now that the old pump is out, install the new one in the reverse order:

  1. Lower the new pump assembly into the tank, making sure the float arm does not catch on the edge of the opening.
  2. Seat the pump properly on the tank opening.
  3. Install the lock ring and rotate it clockwise until it is snug. Do not overtighten.
  4. Reconnect the electrical connectors.
  5. Reconnect the fuel supply and return hoses. Push them firmly until they click into place.
  6. Reconnect the EVAP hoses.
  7. If you lowered the tank, raise it back into position and reconnect the filler neck and all lines.
  8. If you used an access panel, reinstall the access plate and reseal it. Replace the floor cover and carpeting.
  9. Reconnect the negative battery cable.
  10. Replace the fuel pump fuse.

Testing for Leaks

After everything is back together, you need to verify the installation before driving:

  1. Add fuel to the tank if you drained it.
  2. Turn the ignition key to the ON position without cranking the engine. You should hear the fuel pump prime for about two seconds.
  3. Check all connections for leaks. Look carefully at the fuel line fittings and the lock ring area.
  4. Start the engine and let it idle for a few minutes.
  5. Do a final visual inspection under the vehicle and around the tank for any signs of fuel leakage.

Cost Considerations

If you decide to have a mechanic do this job instead, know what to expect. The average cost for a 2007 Chrysler Aspen fuel pump replacement is around $537, with $236 for parts and $301 for labor. However, prices vary significantly by location and provider:

  • YourMechanic estimate: $786.60 for parts and labor
  • AutoNation Mobile Service: $549 to $696 depending on your location
  • Shop or dealer price: $909 to $1,271

If you do the job yourself, you will only pay for the parts. A new aftermarket fuel pump module typically costs between $46 and $85. OEM Mopar parts run higher, from $420 to $650.

What About the Fuel Filter?

While you have the fuel system apart, it is a good idea to replace the fuel filter as well. This maximizes the life of your new fuel pump. Some Aspen models use an in-tank pickup screen, while others use an external inline filter. Check your specific configuration and replace the filter if it is externally mounted.

When to Call a Professional

This job is doable for a confident DIYer, but it is not for everyone. The fuel tank removal procedure in particular carries real risks. If you are not comfortable working with fuel systems, or if your Aspen requires dropping the tank, consider hiring a qualified mechanic. The job is rated 5 out of 5 difficulty for professional recommendation in some guides.

Recommended: KEMSO Fuel Pump for Your Chrysler Aspen

When it comes time to buy a replacement fuel pump for your 2007 Chrysler Aspen, consider the KEMSO brand. KEMSO fuel pumps are designed as high-performance, OEM replacement parts that meet or exceed factory specifications. Each KEMSO pump is built with quality materials and undergoes rigorous testing to ensure reliable fuel delivery and long service life. KEMSO stands behind their products with a lifetime warranty, giving you peace of mind that your investment is protected. Whether you are replacing a worn-out pump or upgrading for better performance, KEMSO offers a dependable solution. Visit their website to explore their full line of fuel pumps and find the right fit for your Aspen: https://www.kemsoracing.com/

Final Thoughts

Removing the fuel pump on a 2007 Chrysler Aspen is a manageable job if you take your time and follow safety protocols. The key is confirming your access method first—either through the rear cargo floor panel or by lowering the tank. Relieve fuel pressure, disconnect the battery, and work in a well-ventilated area. Once the old pump is out, transfer any reusable parts, install the new unit carefully, and test thoroughly for leaks. If you do not feel confident doing this yourself, professional replacement will cost between $549 and $1,271 depending on your location and provider. Whichever route you choose, replacing a failing fuel pump promptly will keep your Aspen running reliably and safely.

For quality replacement parts, remember to check out KEMSO fuel pumps at https://www.kemsoracing.com/ for high-performance, OEM-equivalent options backed by a lifetime warranty.


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