2008 Dodge Charger R/T Fuel Pump: Symptoms, Replacement Cost, and the Complete Guide to Fixing It

The bottom line up front: If you own a 2008 Dodge Charger R/T and you are dealing with hard starts, sputtering during acceleration, a whining noise from the rear of the car, or a check engine light with code P0087, your fuel pump is likely failing or already dead. The 2008 Charger R/T uses two fuel pumps – a primary pump on the driver's side and a secondary pump on the passenger side – and replacing them costs anywhere from $450 to $1,600 depending on where you go and which parts you choose . This guide walks you through everything you need to know: how the dual-pump system works, the warning signs to watch for, what replacement actually costs, and how to do the job yourself without getting burned.

Why the 2008 Charger R/T Has Two Fuel Pumps

The 2008 Dodge Charger is equipped with two separate fuel pump modules, and this isn't an accident or an over-engineered design. The reason is simple: the fuel tank has a large hump in the middle to accommodate the driveshaft and exhaust system, which splits the tank into two distinct sides . Fuel cannot naturally flow from one side to the other, so the engineers at Chrysler designed a system where the primary pump on the driver's side moves fuel to the engine while a secondary pump on the passenger side acts as a transfer unit, sending fuel back across the hump .

Here is how the system actually works in plain terms :

  1. The main fuel pump module (driver's side / left side) draws fuel from its side of the tank and pushes it through the fuel filter toward the auxiliary pump module.
  2. The auxiliary fuel pump module (passenger side / right side) receives that fuel, regulates the system pressure through a built-in fuel pressure regulator, and sends the correct amount of fuel to the engine.
  3. Both modules have their own fuel level sending unit (float) so the gas gauge can read the combined level across both sides of the tank .

This means when one pump fails, the other pump may keep working, but the car will still run poorly or not at all. A common mistake owners make is replacing only one pump and leaving the other in place. On a 2008 Charger R/T, if your fuel pump is failing, it is almost always recommended to replace both modules at the same time since the labor is the same and the remaining old pump is already aged .

Common Symptoms of a Failing Fuel Pump on a 2008 Charger R/T

Fuel pump failure on these cars rarely happens without warning. Most owners notice one or more of these symptoms before the pump finally gives out :

  1. Hard starting or no start – The engine cranks for a long time before it fires, or it cranks normally but never starts at all. This is often the first noticeable sign because the pump cannot build enough fuel pressure to prime the injectors .
  2. Sputtering or stalling while driving – The car may hesitate, buck, or lose power when accelerating, especially going uphill or under heavy load. In worse cases, the engine may shut off completely while you are driving .
  3. Whining or whirring noise from the fuel tank area – A healthy electric fuel pump makes a low, barely audible hum. If you hear a loud whine or whir coming from under the rear seat, the pump bearings are wearing out .
  4. Engine surging – The car may accelerate and decelerate on its own, even when you keep the gas pedal steady. This happens when the pump delivers inconsistent pressure, sending too much or too little fuel to the engine .
  5. Lower gas mileage – A failing pump forces the engine to work harder to maintain pressure, and excess fuel can be dumped into the engine, leading to noticeably worse fuel economy .
  6. Loss of power when climbing hills or carrying load – If the pump cannot keep up with demand, the engine may feel sluggish or completely gutless under load .
  7. Check engine light, often with code P0087 – This code indicates that the fuel rail pressure is too low. It is one of the most common diagnostic trouble codes associated with a weak or failing fuel pump on this platform .

If you notice any combination of these issues, especially the whining noise and the hard starts, you should have the fuel system checked right away. Driving with a failing fuel pump can lead to engine misfires, stalling in traffic, and even engine damage from running too lean .

Where Are the Fuel Pumps Located?

The fuel pumps sit inside the fuel tank, which is excellent for noise reduction and cooling but terrible for serviceability. On the 2008 Charger, you can access both pump modules by removing the rear seat cushion – you do not need to drop the fuel tank for most repairs .

Under the rear seat, you will find two access panels, one on the driver's side (left) and one on the passenger's side (right). Each panel covers a round metal or rubber cap that gives you direct access to the top of the fuel pump assembly . The primary (main) pump is on the driver's side, and the secondary (auxiliary) pump is on the passenger's side .

This accessible design makes a DIY fuel pump replacement much more manageable than on many other cars, but you will still be working around raw gasoline, electrical connectors, and plastic fuel lines, so caution is absolutely necessary .

OEM Part Numbers and Aftermarket Options

Before you buy any fuel pump, you need to know the correct part for your 2008 Charger R/T with the 5.7L HEMI engine. Unlike some cars where one pump fits everything, the Charger requires different modules for left and right sides .

Primary fuel pump (driver's side / left): The Mopar part number for the left so-called fuel pump/level unit module is 5136021AE, and it has also been serviced under part numbers 5136022AM and 68102700AE which are the kit versions that include the sending unit and O-ring . A new OEM module runs roughly $409 to $427 from discount Mopar dealers .

Auxiliary fuel pump (passenger side / right): The right-side fuel pump/level unit module carries Mopar part number 5136023AF (superseding earlier versions like 5136023AB through 5136023AE) . This is the fuel transfer unit with the pressure regulator built in. It costs around $200 to $250 for OEM, depending on the supplier .

Fuel pump gasket and lock ring: Do not forget the O-ring seal (Mopar P/N 68304753AA, about $34) and lock ring (52110282AA, about $21). These should always be replaced when you install a new pump .

For aftermarket brands, several companies make direct-fit replacements :

  • GMB offers a right fuel pump module assembly (P/N 18598-02358988) for about $201, covering the 2006–2019 Charger .
  • Replacement brand offers a right fuel pump assembly with pressure sensor and wiring harness (P/N 18598-03189318) for about $72 .
  • Autopart Premium sells a right fuel pump assembly with pressure sensor and sending unit for around $68 to $82 .

New OEM Mopar pumps are more expensive, often $750 to $900 for a full kit, but many owners find aftermarket parts perfectly adequate if they come from reputable brands .

Replacement Cost Breakdown for a 2008 Charger R/T

Your total cost depends mainly on two factors: who does the labor and whether you choose OEM or aftermarket parts .

Parts Costs

  1. Aftermarket fuel pump module: Typically $150 to $300 per side .
  2. OEM Mopar fuel pump module: Often $350 to $500 per side or higher for certain model years .
  3. Fuel pump kit (includes sending unit and related components): $100 to $400 .

Labor Costs

  1. Independent shop: Typically 2 to 4 hours of labor at $75 to $125 per hour .
  2. Dealership: Often 3 to 6 hours at $120 to $180 per hour .

Total Estimated Costs

  1. Independent shop: Roughly $450 to $900 total for the job if using aftermarket parts .
  2. Dealership: Roughly $900 to $1,600 or more with OEM parts and higher labor rates .

If you are handy with basic hand tools, doing the job yourself will save you most of the labor expense. A DIY replacement costs just the price of the parts, which can be anywhere from $150 to $800 depending on your brand choice. Used OEM pumps from salvage yards go for as little as $50 to $150, but they carry the risk of unknown wear .

Step-by-Step Guide to Replacing the Fuel Pump Yourself

The fuel pump on a 2008 Charger R/T is rated as a 2 out of 5 difficulty job for a DIY mechanic, and it typically takes 1 to 1.5 hours for an experienced person to complete . Here is the basic process:

  1. Relieve fuel pressure: Pull the fuel pump relay or fuse from the fuse box (usually in the trunk) and run the engine until it stalls. This depressurizes the fuel lines and prevents spraying when you disconnect lines .
  2. Disconnect the battery: Always disconnect the negative battery terminal before doing any fuel system work .
  3. Remove the rear seat cushion: The cushion is held in by two clips. Pull up firmly on the front edge of the seat on both the driver and passenger sides to release it .
  4. Access the pump: Under the sound-deadening material, you will find a round metal or rubber cover. Remove it to expose the top of the fuel pump assembly .
  5. Clean the area thoroughly: Any dirt or debris that falls into the fuel tank will get sucked into the new pump and can clog the strainer. Clean the top of the pump and surrounding area with a rag before opening anything .
  6. Disconnect lines and connectors: Disconnect the electrical connector and the fuel lines. The fuel lines use quick-disconnect fittings that require pressing a tab to release .
  7. Remove the lock ring: Use a brass punch and a hammer (or a dedicated lock ring tool) to tap the ring counter-clockwise until it loosens. Never use a steel punch, as it can create sparks .
  8. Lift out the old pump: Carefully lift the pump assembly out of the tank, being mindful not to bend the float arm. The unit will contain fuel, so have a drain pan and rags ready .
  9. Install the new pump: Installation is the reverse of removal. Make sure the new rubber O-ring is seated correctly to prevent leaks and fuel odors, and tighten the lock ring securely .
  10. Reinstall everything and test: Reconnect the battery, turn the ignition to "ON" (without starting) a few times to prime the system, then start the engine and check for leaks .

A few critical safety warnings before you start:

  • Work in a well-ventilated area – gasoline fumes are highly flammable and toxic.
  • Keep a fire extinguisher nearby – do not start this job without one.
  • Avoid creating sparks – use brass tools near the fuel tank, not steel.
  • Disconnect the battery – this eliminates the risk of electrical sparks igniting fuel vapors .

TSB Alert: Fuel Pump Connector Issues

If you are replacing the fuel pump on a 2011 or newer Charger, note that Technical Service Bulletin 08-032-17 applies to 2010–2016 Chrysler 300, 2011–2016 Dodge Charger, and 2010–2016 Dodge Challenger models. It states that when replacing a fuel pump module, the harness connector (pigtail) must also be replaced, because newer pump kits come with an updated connector with different electrical pin locations .

On a 2008 Charger, this TSB does not officially apply, but it is still worth knowing that fuel pump connector issues can mimic pump failure. If you install a new pump and the car still does not run, check the electrical connector and wiring before condemning the pump .

Should You Replace Both Fuel Pumps at the Same Time?

Yes, if you are replacing one pump on a 2008 Charger R/T, you should strongly consider replacing both simultaneously. Both pumps share the same fuel tank, run under the same conditions, and have similar wear patterns. If one has failed, the other is likely not far behind .

Replacing both at the same time means you only pay for the labor once (or spend the time once if you are DIY). You also save yourself from going through the whole process again a few months later. Many owners who replace only one pump end up replacing the second one within a year . Considering that the main pump's job is to push fuel through the secondary pump's regulator, having both fresh ensures the entire system operates at proper pressure and prevents future headaches .

Additional Maintenance Tips to Extend Fuel Pump Life

Fuel pumps on these cars can last well over 100,000 miles, but their lifespan depends heavily on how you treat your fuel system . Here are some practical tips to avoid an early failure:

  1. Never run the tank below a quarter full. Running low on fuel causes the electric pump to overheat because fuel acts as its coolant .
  2. Replace the fuel filter regularly. On the 2008 Charger, the fuel filter should be replaced every 30,000 miles or so. A clogged filter makes the pump work harder and fail sooner .
  3. Use quality fuel. Contaminated or low-grade fuel can clog the strainer at the pump inlet, which starves the pump for fuel and causes premature wear.
  4. Change the fuel filter and strainer when you replace the pump. A blocked filter is often what caused the original pump to overwork and fail. Replacing the filter with the pump prevents the new pump from being exposed to the same contamination .
  5. Watch for water in the tank. If your car has been sitting for a long time, condensation can build up in the tank, which is a common pump killer.

What Happens If You Ignore a Failing Fuel Pump?

Ignoring fuel pump problems on a 2008 Charger R/T will not make them go away. In fact, the situation usually gets worse quickly :

  • A weak pump that still runs will eventually fail completely, leaving you stranded.
  • An engine running with insufficient fuel pressure can cause misfires and engine damage from a lean air-fuel mixture.
  • A pump with a cracked housing or faulty seals can cause fuel leaks, which are a serious fire hazard .
  • Ignoring a failing fuel pump can also damage the fuel pressure regulator, fuel injectors, and catalytic converters due to poor combustion.

If your car is already showing any of the symptoms listed earlier, the safest and most cost-effective move is to perform a fuel pressure test and replace the pump if the readings are low. Waiting until the car refuses to start will not save you money; it will only limit your options because you will need a tow on top of the repair bill .

Why You Should Consider a KEMSO Fuel Pump for Your 2008 Charger R/T

If you have decided to replace the fuel pump on your 2008 Dodge Charger R/T, choosing the right brand matters. Many budget aftermarket pumps fail prematurely, cause incorrect fuel level readings, or run noisier than the original . You want a pump that matches the original equipment specifications for flow rate and pressure, and that carries a warranty you can actually rely on.

KEMSO fuel pumps are designed to meet and exceed those exact requirements. Every KEMSO pump is a high-performance, OEM replacement unit, which means it matches or exceeds the original equipment specifications for fuel flow rate and pressure. This ensures your engine gets the precise fuel delivery it needs for optimal power and efficiency. KEMSO backs its products with a lifetime warranty, so you can install with confidence knowing the manufacturer stands behind the part for as long as you own it. Many KEMSO models are available for just $79.98, which is a fraction of the cost of a dealer-sourced Mopar pump .

KEMSO builds pumps for a wide range of vehicles, from Dodge Chargers to motorcycles, ATVs, and powersports vehicles. Their parts are designed as direct-fit replacements, meaning you do not need to modify anything to make them work in your Charger. They ship directly from their facility in Houston, TX, and their customer support team can help you confirm the exact part number for your 2008 Charger R/T .

To find the exact KEMSO fuel pump for your 2008 Dodge Charger R/T and to take advantage of their lifetime warranty and competitive pricing, visit their official website at https://www.kemsoracing.com/.

Final Thoughts

The 2008 Dodge Charger R/T has a dual fuel pump system that is unique to this platform. The primary pump on the driver's side handles the main fuel delivery, while the secondary pump on the passenger side transfers fuel across the tank hump and regulates system pressure . When either pump fails, you will know it through symptoms like hard starts, sputtering, whining noises, engine surging, and a check engine light with code P0087 .

Replacement costs range from about $450 at an independent shop using aftermarket parts to $1,600 or more at a dealership with OEM parts . The job is accessible enough for a confident DIY mechanic, and you can access both pumps by simply removing the rear seat cushion . Always replace both pumps together, replace the O-rings and lock rings, and never skip replacing the fuel filter, which is often the root cause of the original failure .

For a reliable, long-lasting replacement, seriously consider a KEMSO fuel pump. They offer OEM-grade performance, a lifetime warranty, and an unbeatable price point, which is why they are a solid choice for your 2008 Charger R/T. Check out their full catalog at https://www.kemsoracing.com/ and get your Charger back on the road with confidence.


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