2012 Chrysler 300 Fuel Pump Replacement: Cost, Symptoms, and Step-by-Step Guide

The bottom line up front: If you own a 2012 Chrysler 300 and suspect the fuel pump is failing, expect to pay between $400 and $1,120 for a professional replacement at an independent shop, depending on your engine type and whether you choose OEM or aftermarket parts. At a dealership, that price can climb to $800–$1,200 or more . The fuel pump sits inside the fuel tank, but on most 2012 Chrysler 300 models you can access it through a panel under the rear seat — no need to drop the tank . This guide walks you through the warning signs, what the job costs, how to do it yourself, and how to pick the right replacement part.

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How to Know Your 2012 Chrysler 300 Needs a Fuel Pump Replacement

A failing fuel pump does not always trigger a check engine light . Many owners first notice performance issues that slowly get worse over weeks or months. Watch for these common warning signs:

1. Engine sputtering or hesitation at high speeds. If your car struggles to maintain speed or feels like it is choking when you press the gas, the pump may not be delivering enough fuel pressure .

2. Whining noise from the fuel tank. A healthy fuel pump runs quietly. If you hear a loud whirring or humming sound coming from the rear of the vehicle, especially near the fuel tank, it is a strong sign the pump is wearing out .

3. Difficulty starting the engine. If the engine cranks but takes longer than usual to start, or if it does not start at all, the pump may not be building enough pressure .

4. Stalling at high temperatures. A failing fuel pump can overheat, causing the engine to stall when it gets hot. If your car stalls after driving for a while but starts again after cooling down, the pump is likely the culprit .

5. Loss of power under stress. When climbing a hill or carrying a heavy load, a bad pump cannot keep up, and the engine will feel sluggish or lose power completely .

6. Car won't start. If you ignore the earlier symptoms long enough, the pump will eventually fail completely, and the engine will not start at all .

Quick test: Turn the key to the "run" position without starting the engine. You should hear a brief humming sound from the rear of the car as the fuel pump primes the system. If you hear nothing, the pump is not getting power or is dead .

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2012 Chrysler 300 Fuel Pump Replacement Cost Breakdown

The total cost varies based on parts, labor, and where you take the car. Here is a realistic look at what you will pay:

Parts Cost

The fuel pump is sold as a complete module assembly that includes the pump, sending unit, float, and strainer . You have three main options:

1. Aftermarket fuel pump module: $100–$350

2. OEM Mopar fuel pump module: $250–$700

3. High-performance or complete sending-unit kits: $300–$900

For a 2012 Chrysler 300 with the 3.6L V6, a popular aftermarket option like the Delphi DFG1053 costs around $219.99 with a limited-lifetime warranty . For the 5.7L Hemi or 6.4L SRT models, expect higher parts costs, with some modules reaching $350–$550 .

Labor Cost

Labor depends on the shop's hourly rate and how long the job takes. Since the fuel pump is accessed through the rear seat, most mechanics can complete the job in 2–4 hours . If the tank needs to be dropped, which is rare for this model, labor can stretch to 4–6 hours .

• Hourly labor rate: $75–$150 per hour
• Estimated labor cost: $150–$600

Total Installed Cost

For a 2012 Chrysler 300, real-world estimates from AutoNation Mobile Service show prices ranging from $359 to $988 depending on the location and engine type . The national average across all vehicles for fuel pump replacement is between $611 and $894 .

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Factors That Affect the Price

Not all 2012 Chrysler 300 fuel pump replacements cost the same. Here is what moves the price up or down:

1. Engine type. The 3.6L Pentastar V6 uses a different pump module than the 5.7L Hemi V8 or the 6.4L SRT V8 . The V8 models often have more expensive parts because the pump must handle higher fuel flow requirements .

2. OEM vs. aftermarket parts. OEM Mopar parts are more expensive but guarantee a perfect fit. Aftermarket parts from brands like Delphi, Bosch, or Spectra Premium are more affordable and still offer good reliability .

3. Shop type. Dealerships charge higher labor rates and use OEM parts, so you will pay a premium. Independent shops are more affordable, but make sure they have experience with Chrysler 300s .

4. Your location. Labor rates are higher in major metro areas like New York or Los Angeles compared to rural areas .

5. Additional services. Some shops include diagnostic fees, fuel tank draining, and disposal fees in the quote. Always ask for a written, itemized estimate so you know exactly what is included .

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Where Is the Fuel Pump Located on a 2012 Chrysler 300?

The fuel pump is inside the fuel tank. On the 2012 Chrysler 300, you can access it through an access panel under the rear seat cushion on the left side of the vehicle . You do not need to drop the fuel tank to replace the pump .

To access it:

1. Remove the rear seat cushion by pulling up firmly on the front edge.
2. You will see a metal access panel.
3. Remove the screws to expose the fuel pump module.
4. The pump module sits on top of the fuel tank and is secured by a lock ring .

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DIY Fuel Pump Replacement: Step-by-Step

If you are mechanically inclined and have the proper tools, replacing the fuel pump on a 2012 Chrysler 300 is a manageable weekend project. You can save between $300 and $800 in labor costs by doing it yourself .

Tools and Materials You Will Need

• Combination wrench set (8mm to 19mm)
• Socket set with ratchet and universal joint
• Screwdrivers (Phillips and flathead)
• Fuel line disconnect tool
• Torque wrench for precise tightening
• Drain pan for residual fuel
• Safety gloves and goggles
• Fuel-resistant container
• Class B or C fire extinguisher within reach
• Wheel chocks
• New fuel pump assembly with gasket or O-ring
• New fuel filter (replace it alongside the pump every time)

Safety First: Pre-Installation Checklist

Working with fuel is dangerous. Never skip these steps:

1. Park on level ground and engage the parking brake.
2. Disconnect the battery — negative terminal first — to prevent sparks.
3. Allow the engine to cool for at least 30 minutes.
4. Work in a well-ventilated area — never in an enclosed garage.
5. No smoking and keep open flames away.
6. Keep a fire extinguisher nearby .

Step 1: Relieve Fuel System Pressure

Modern fuel injection systems maintain pressure up to 60–65 psi, and skipping this step can cause a dangerous spray of gasoline .

• Locate the fuel pump relay in the engine compartment fuse box.
• Remove the relay or fuse.
• Start the engine and let it run until it stalls.
• Crank the engine for 5 to 10 seconds to release any remaining pressure.
• Turn the ignition completely off and disconnect the battery negative terminal .

Step 2: Access the Fuel Pump

On the 2012 Chrysler 300, the fuel pump is accessed through a panel under the rear seat .

• Remove the rear seat cushion.
• Unscrew the access panel (typically 4 to 8 screws).
• Disconnect the electrical connector and fuel lines.
• Note the orientation of everything for reassembly .

Step 3: Remove the Old Fuel Pump

Warning: Have your fuel container ready — up to 1 gallon of fuel may remain in the module .

• Disconnect the fuel lines using a line disconnect tool to release quick-connect fittings.
• Remove the electrical connector by pressing the tab and pulling firmly.
• Unscrew the locking ring by turning it counter-clockwise.
• Extract the old pump assembly carefully — tilt and lift it to avoid damaging the strainer .

Step 4: Clean the Fuel Tank and Inspect Components

Fuel contamination is a leading cause of premature fuel pump failure .

• Clean the inside of the fuel tank thoroughly.
• Clean out the fuel lines — they may have accumulated contaminants from the old pump or tank.
• Replace the in-line fuel filter — a clogged filter will significantly shorten the life of your new pump.
• Always install a new strainer on the pump itself .

Step 5: Install the New Fuel Pump

• Before installation, compare the old and new pumps to make sure they are identical.
• Install the new gasket or O-ring — lubricate it lightly with clean fuel.
• Transfer any components from the old unit that need to be reused, such as the fuel level sensor float arm or electrical harness pigtail.
• Clean the sealing surface on the tank meticulously.
• Insert the new pump assembly gently into the tank opening, aligning the marks on the module with the tank flange.
• Secure the locking ring — torque it to manufacturer specifications, typically 25 to 35 ft-lbs.
• Reconnect the fuel lines — listen for a click to confirm they are fully engaged.
• Reconnect the electrical plug and ensure it is secure .

Step 6: Test and Verify

• Reconnect the battery.
• Turn the ignition to the "on" position (do not start the engine). You should hear the pump prime for 2–3 seconds.
• Check for any fuel leaks around the connections.
• Start the engine and let it idle for a few minutes.
• Take the car for a test drive to confirm smooth acceleration and proper power delivery .

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Choosing the Right Replacement Pump: OEM vs. Aftermarket

When replacing the fuel pump, you have three main options. Your choice directly impacts cost, reliability, and fitment:

Recommendation: For the 2012 Chrysler 300, always choose a premium aftermarket brand or OEM. Saving $50–$100 on a cheap pump will likely cost you far more in the long run .

For the 2012 Chrysler 300, the commonly referenced aftermarket replacement is the Delphi DFG1053, which costs around $219.99 and comes with a limited-lifetime warranty . Another popular option is the Spectra Premium D7048M at $166.99 . Both fit the 2012 Chrysler 300 with the 3.6L V6 engine.

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How Long Does a Fuel Pump Last?

Under normal driving conditions, most in-tank fuel pumps last between 100,000 and 150,000 miles . However, several factors can shorten this lifespan:

1. Running the tank low frequently — Fuel cools and lubricates the pump; low fuel leads to overheating .
2. Using poor-quality fuel — Contaminants accelerate wear .
3. Clogged fuel filter — Forces the pump to work harder .
4. Electrical issues — Voltage drops or corroded connectors damage the pump motor .

To extend pump life, always keep the fuel tank at least a quarter full, use high-quality fuel from reputable stations, and replace the fuel filter on schedule .

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Why Choose KEMSO for Your 2012 Chrysler 300 Fuel Pump?

When it comes time to replace the fuel pump on your 2012 Chrysler 300, the brand you choose matters just as much as the installation itself. KEMSO offers a range of fuel pump products that are built to meet or exceed original equipment standards.

Here is why KEMSO stands out:

1. High-Performance Build. KEMSO fuel pumps are engineered for durability and consistent fuel delivery. They are designed to handle the demands of daily driving while maintaining proper fuel pressure across all engine loads .

2. True OEM Replacement. KEMSO fuel pump assemblies are manufactured as direct replacements for the original part in your 2012 Chrysler 300. This means a proper fit, correct electrical connections, and reliable operation right out of the box .

3. Lifetime Warranty. KEMSO stands behind its products with a lifetime warranty. That kind of confidence from the manufacturer gives you peace of mind, knowing that your investment is protected for as long as you own the vehicle.

4. Cost-Effective. KEMSO fuel pumps are priced competitively compared to OEM Mopar parts, giving you a high-quality alternative that does not break the bank.

If you are looking for a dependable fuel pump replacement for your 2012 Chrysler 300, check out the full range of KEMSO fuel pump products at https://www.kemsoracing.com/. They carry fuel pumps for a wide range of vehicles, and their quality and warranty make them a smart choice for any DIYer or professional mechanic.

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Final Thoughts

A failing fuel pump in your 2012 Chrysler 300 does not have to ruin your week or drain your wallet. Knowing the symptoms — sputtering at speed, whining from the tank, hard starting, or stalling — helps you catch the problem early . The repair itself is straightforward on this model because the pump is accessible through the rear seat, which keeps labor costs down .

Whether you choose to have a professional handle the job or decide to DIY, the key is to buy a quality replacement part. A premium aftermarket pump from a trusted brand like KEMSO gives you the reliability of OEM at a fraction of the cost, and with a lifetime warranty, it is a decision you will not regret.

For more information on fuel pump options, replacement parts, and installation guides, visit https://www.kemsoracing.com/ and browse their selection of high-performance fuel pump assemblies for your 2012 Chrysler 300.