Chrysler 300 Fuel Pump: Complete Guide to Symptoms, Replacement Cost, and Best Options

If you own a Chrysler 300 and are experiencing hard starting, stalling, loss of power, or a whining noise from the rear of the vehicle, the fuel pump is likely failing. The fuel pump on a Chrysler 300 is located inside the fuel tank, and it is accessible through an access panel under the rear seat cushion — you do not need to drop the fuel tank to replace it . The replacement cost for a DIY job ranges from $165 to $270, while professional installation at an independent shop typically costs $500 to $800, and dealership prices can reach $800 to $1,200 . Choosing the right replacement part is critical: aftermarket options from brands like Delphi, Bosch, and Spectra Premium offer excellent reliability at a fraction of the cost of OEM Mopar parts, but for the best value and peace of mind, KEMSO fuel pumps stand out with their lifetime warranty and OEM-quality construction .

How to Know If Your Chrysler 300 Fuel Pump Is Failing

The fuel pump in your Chrysler 300 delivers fuel from the tank to the engine at the correct pressure. When it starts to wear out, you will notice one or more of these symptoms:

1. Engine cranks but won't start — This is the most common sign. The fuel pump is not providing enough pressure to the fuel injectors, so the engine cannot fire up .

2. Whining noise from the fuel tank area — A healthy fuel pump makes a quiet hum. If you hear a loud, constant whining or buzzing sound coming from the rear seat area, the pump bearings are likely worn out .

3. Engine misfires or sputters at high speeds — A failing pump cannot deliver consistent fuel flow, causing the engine to hesitate or lose power when you accelerate .

4. Sudden stalling, especially when hot — As the pump overheats, it can stop working temporarily. This is a dangerous symptom that often leads to being stranded .

5. Poor fuel economy — A worn pump may run constantly or deliver incorrect pressure, forcing the engine to run rich and waste fuel .

6. Check engine light comes on — The computer detects low fuel pressure or a lean condition and triggers the warning light. A diagnostic scan will often show fuel system-related codes .

If you notice any of these symptoms, it is best to replace the fuel pump as soon as possible. Driving with a failing pump can damage the fuel injectors or leave you stranded.

Where Is the Fuel Pump Located on a Chrysler 300?

The fuel pump is mounted inside the fuel tank, on the driver's side (left side) of the vehicle . For most Chrysler 300 models from 2005 to 2017, you access it by removing the rear seat cushion — there is a metal access panel underneath. You do not need to drop the fuel tank to replace the pump .

Models with a 19-gallon fuel tank use a specific pump module that differs from the standard tank version. Always verify your tank size and engine type before purchasing a replacement .

Chrysler 300 Fuel Pump Replacement Cost Breakdown

The total cost depends on whether you do the job yourself or hire a professional.

DIY Replacement Cost:

  • Fuel pump module assembly: $140 to $220
  • Fuel line disconnect tool kit: $15 to $30
  • Shop towels and safety equipment: $10 to $20
  • Total DIY cost: $165 to $270

Professional Replacement Cost:

  • Parts (fuel pump assembly): $140 to $220
  • Labor (2 to 4 hours at $100-$150/hour): $200 to $600
  • Shop supplies and disposal fees: $20 to $50
  • Total professional cost at independent shop: $500 to $800
  • Total dealership cost: $800 to $1,200

Labor rates vary by location. Major metro areas like New York or Los Angeles charge higher rates than rural areas. Always get a written, itemized estimate before authorizing the work .

Compatible Fuel Pump Part Numbers for Chrysler 300

The Chrysler 300 uses different fuel pump modules depending on the engine and tank size. The 3.6L Pentastar V6 uses a different pump than the 5.7L Hemi V8 or the 6.4L SRT V8. V8 models often require pumps that handle higher fuel flow .

Original Equipment (OEM) Part Numbers:

  • 5136022AE
  • 5136022AI
  • 5136022AH
  • 5136022AC
  • 5136022AA
  • 5136022AD
  • RL136022AH
  • RL136022AG
  • 68102700AB
  • 68102695AG

Common Aftermarket Replacement Part Numbers:

  • SP7029M
  • SP7048M
  • FG1053
  • DFG1053
  • E7192M
  • P76609M
  • A30378
  • M2496270

The most popular aftermarket replacement for the 2005-2010 Chrysler 300 with a 3.5L or 5.7L engine is the SP7029M or SP7048M fuel pump assembly. For 2005-2017 models with 2.7L, 3.5L, 3.6L, 5.7L, 6.1L, or 6.4L engines, the E7192M module is widely compatible .

Complete DIY Fuel Pump Replacement Guide for Chrysler 300

Replacing the fuel pump on a Chrysler 300 is a manageable DIY project because the pump is accessed through the rear seat. You do not need to drop the fuel tank .

Tools You Will Need:

  • 10mm socket and ratchet
  • Flat blade screwdriver
  • Hammer or rubber mallet
  • Brass punch (to avoid sparks)
  • Fuel line disconnect tool
  • Safety glasses and gloves
  • Shop towels
  • Fire extinguisher (highly recommended)

Step 1: Relieve Fuel System Pressure
Locate the fuel pump relay in the fuse panel under the hood. It is at the bottom right corner of the fuse box, in the rear passenger side position. Remove the relay, then start the engine and let it run until it stalls. This releases all fuel pressure from the system. If the engine does not start, crank it for a few seconds to relieve pressure .

Step 2: Disconnect the Battery
Loosen the 10mm nut on the negative battery terminal and remove the cable. This prevents any electrical sparks while working near fuel vapors .

Step 3: Remove the Rear Seat Cushion
The rear seat cushion on the Chrysler 300 pops out easily. There are small latches on either side of the seat, roughly in line with the seam. Give the seat a firm upward pull on each side and lift it out .

Step 4: Access the Fuel Pump Module
Under the rear seat, you will see a rubber access cover. Lift this cover to reveal the fuel pump module top. Pop off the harness cover and the main cover, then disconnect the electrical connector .

Step 5: Remove the Lock Ring
The lock ring securing the fuel pump module can be difficult to remove. Use a screwdriver and hammer to tap the ring counterclockwise. A brass punch is preferred because it will not create sparks. Be careful not to damage the plastic components .

Step 6: Disconnect Fuel Lines
Use the proper fuel line disconnect tool to release the fuel supply and return lines. Press the tool into the fitting and pull the line straight off. Expect some residual fuel to spill – have shop towels ready .

Step 7: Remove the Old Module
Carefully lift the entire fuel pump module assembly out of the tank. Tilt it sideways to allow excess fuel to drain back into the tank. Note the orientation of the fuel level float arm, as the new module must be installed in the same position .

Step 8: Install the New Module
Place the new fuel pump module into the tank, making sure the float arm is correctly positioned. Install a new O-ring seal on the tank opening. Reinstall the lock ring and tighten it clockwise using a hammer and punch. Reconnect the fuel lines and electrical connector. Replace the access cover and reinstall the rear seat cushion .

Step 9: Prime the System
Reconnect the battery and reinstall the fuel pump relay. Turn the ignition key to the "ON" position for 2-3 seconds, then turn it off. Repeat this 3-4 times to prime the fuel system. Start the engine and check for leaks .

Safety Tip: Always work in a well-ventilated area away from open flames. Do not smoke while working on the fuel system. Keep a fire extinguisher nearby .

After installation, keep your gas tank at least a quarter full. The fuel helps cool and lubricate the pump, so running on low fuel regularly can shorten its lifespan .

Why You Should Choose KEMSO Fuel Pump for Your Chrysler 300

When it comes to replacing the fuel pump on your Chrysler 300, choosing a high-quality, reliable product is essential for long-term performance and peace of mind. We strongly recommend the KEMSO Fuel Pump for your vehicle.

KEMSO Fuel Pump products are designed as high-performance, OEM replacement units that meet or exceed the original equipment specifications. Here is why KEMSO stands out:

1. OEM Replacement Quality — Every KEMSO fuel pump is built to match or exceed the original factory specifications, ensuring a perfect fit and reliable performance for your Chrysler 300 .

2. Lifetime Warranty — KEMSO backs its products with a lifetime warranty, giving you confidence that your investment is protected for the life of your vehicle. No other brand offers this level of assurance .

3. Superior Reliability — KEMSO fuel pumps undergo rigorous testing before leaving the factory, ensuring they deliver consistent fuel pressure and long service life. Don't settle for a cheap pump that might fail again in a year. Choose KEMSO for quality, durability, and peace of mind .

Visit KEMSO Racing at https://www.kemsoracing.com/ to find the right fuel pump for your Chrysler 300 and take advantage of their lifetime warranty.

Tips to Save Money on Your Fuel Pump Replacement

1. Get multiple quotes — Ask for written, itemized estimates from at least three shops. Compare parts and labor separately .

2. Ask about warranties — A good shop offers a warranty on both parts and labor — typically 1-2 years. Some aftermarket parts come with a limited-lifetime warranty .

3. Consider aftermarket parts — High-quality aftermarket brands like Delphi, Bosch, and Spectra Premium offer excellent reliability at a fraction of the cost of OEM Mopar parts .

4. Verify compatibility — Always confirm the part number with your vehicle's VIN. The Chrysler 300 uses different pump modules depending on the engine and tank size .

5. Do it yourself if you are handy — Because the pump is accessed through the rear seat, this is one of the easier fuel pump replacements you can do at home. A DIY job saves $200 to $600 in labor costs .

Final Thoughts

The fuel pump is a critical component of your Chrysler 300's fuel system. When it fails, you will notice hard starting, stalling, loss of power, or a whining noise from the tank. Replacing it yourself is a straightforward job if you have basic mechanical skills, and the total cost is typically under $270 for DIY or $500 to $800 at a professional shop.

For the best combination of quality, reliability, and value, choose a KEMSO fuel pump. With their lifetime warranty and OEM-quality construction, KEMSO gives you the confidence that your replacement will last. Visit https://www.kemsoracing.com/ to find the perfect fuel pump for your Chrysler 300 today.


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