2012 Buick Regal Fuel Pump: Location, Symptoms, Cost, and Replacement Guide

The bottom line up front: If your 2012 Buick Regal is cranking but not starting, stalling under load, or whining from the rear of the car, the fuel pump is likely failing. The fuel pump on this model is mounted inside the fuel tank, and on most trims you can access it through a panel under the rear seat on the passenger side—you do not need to drop the fuel tank. Expect to pay between $800 and $900 for a professional replacement, or around $300 if you buy the part yourself and do the labor. This guide walks you through exactly where the pump is located, how to recognize the warning signs, what replacement costs, and how to choose the right part.

Where Is the Fuel Pump Located on a 2012 Buick Regal?

The 2012 Buick Regal uses a submersible electric fuel pump that sits fully inside the fuel tank, which is mounted in the rear of the vehicle behind the rear axle. The good news is that this model has an access panel design on most trims:

  1. Fold the rear seat forward and remove the seat cushion on the passenger side.
  2. Locate the access cover plate in the floor pan beneath the seat.
  3. Remove the cover plate to expose the fuel pump module assembly.
  4. Disconnect the electrical connector and fuel lines.
  5. Remove the locking ring and lift the pump module out of the tank.

This access panel means you do not have to lower or drain the fuel tank for pump replacement on the 2012 Regal, which is a significant advantage compared to many other GM vehicles that require tank removal. However, some sources note that certain trims or pump modules that include the fuel level sending unit may require lowering the tank for full access.

The fuel tank capacity on this model is 18.5 gallons, and the recommended fuel pump pressure is around 58 psi for the direct injection system. The 2.0L turbo and 2.4L engines both depend on a steady, high-pressure fuel supply to run efficiently.

How the Fuel Pump Works

The fuel pump module assembly is more than just a pump—it is the heart of your Regal's fuel delivery system. The module typically includes:

  • The electric pump motor that moves fuel from the tank to the engine
  • A fuel level sending unit that tells your gas gauge how full the tank is
  • A primary fuel strainer that blocks debris from entering the pump

The pump delivers fuel at approximately 58 psi to the direct injection system. The engine requires this steady, high-pressure supply to run properly. If the pump fails or its performance degrades, the engine gets starved of fuel, which causes a range of performance problems or a complete no-start condition.

Modern electric fuel pumps like the one in your Regal are designed to last around 100,000 to 150,000 miles. The pump stays submerged in gasoline while operating, and the fuel acts as a coolant and lubricant for the electric motor. Running the tank consistently below a quarter full lets the pump run hotter, which is a major cause of premature failure.

Symptoms of a Failing Fuel Pump

A failing fuel pump rarely quits without warning. It usually gives you several clues that it is on its way out. Recognizing these signs early can save you from being stranded. Here are the most common symptoms to watch for:

1. Engine Cranks But Won’t Start

This is the most definitive symptom. You will hear the starter motor turning the engine over, but the engine never fires because there is no fuel reaching the injectors for combustion. This can be intermittent at first before becoming a permanent condition.

2. Stalling, Especially Under Load

The engine may start and idle fine, but it stalls when you accelerate, climb a hill, or after it gets hot. This happens because the weak pump cannot supply the extra fuel the engine demands under load.

3. Hesitation or Sputtering

When you press the gas pedal, the car may jerk, sputter, or hesitate before accelerating. This indicates that fuel pressure is inconsistent, and the injectors are not getting a steady supply.

4. Whining Noise from the Fuel Tank

A failing fuel pump motor often makes a loud, high-pitched whine or hum that you can hear from the rear of the vehicle, especially when you first turn the key. A healthy pump makes only a quiet, brief hum when it primes.

5. Loss of Power

The vehicle may feel sluggish and lack its usual power, particularly at highway speeds. This is because the pump cannot deliver enough fuel volume to maintain performance.

6. Check Engine Light

A failing pump can cause a lean fuel condition, which triggers the Check Engine Light. The most common trouble code associated with this failure is P0087 – Fuel Rail/System Pressure Too Low.

7. Surging Power

The car may unexpectedly surge forward or feel like it is speeding up and slowing down on its own while maintaining a steady throttle.

8. Lower Fuel Efficiency

A pump that is losing efficiency will cause the engine to run less efficiently, resulting in poorer gas mileage.

Some of these symptoms can also be caused by a clogged fuel filter or a problem with the fuel pump's electrical circuit, so a professional mechanic will test the fuel pressure and check the pump's power supply before condemning the part.

How Much Does Fuel Pump Replacement Cost?

For a 2012 Buick Regal, a fuel pump replacement typically costs between $800 and $903. This estimate breaks down into:

  • Labor costs: Roughly $220 to $322, which covers the time needed to access the fuel tank, remove the old pump, and install the new one.
  • Parts costs: Approximately $580 for the fuel pump module itself, though this price can fluctuate based on whether you choose an OEM, remanufactured, or aftermarket part.

Another source puts the installed cost in a similar range, with labor estimated between $143 and $181 and parts priced between $624 and $716 depending on where you live and the shop you use.

A 2012 Buick Regal with a 2.0L turbo engine costs about $836 for parts and labor at an independent shop, while a dealership might charge between $981 and $1,408.

If you are willing to buy the pump separately, the part itself can cost as little as $60 for an aftermarket unit or as much as $350 for a genuine OEM part from a dealer. Online retailers sell OEM fuel pump modules for anywhere from $147 to $288, which is substantially less than what you would pay at a dealership counter.

What to Expect During Replacement

If you are having a mechanic do the job, here is what typically happens:

  1. The fuel pump is tested to confirm it is the source of the problem, not a faulty power supply or a clogged fuel filter.
  2. The battery is disconnected to reduce the risk of fire.
  3. The rear seat is removed to access the access panel above the tank.
  4. The pump is removed through the access panel, along with the pre-pump filter screen.
  5. Supply and return lines, EVAP hoses, and electrical connections are disconnected and reconnected.
  6. A new fuel filter is installed if it hasn't been replaced recently.

The fuel pump pressure for the 2012 Regal ranges between 50 and 84 psi depending on the engine configuration, so it is important to use the correct replacement part for your specific engine.

DIY Replacement Considerations

If you are handy with tools and want to save money, replacing the fuel pump yourself is a doable job. You can expect to spend about four to six hours of work with basic tools and the correct process. Here is what you need to know:

Tools and Parts You Need:

  • Socket set with extensions, including 10mm, 12mm, 13mm, and 14mm sockets
  • Flathead and Phillips screwdrivers
  • Pry bar or trim removal tools for interior panels
  • Adjustable wrench and pliers
  • Floor jack and jack stands or ramps
  • Gasoline-safe catch pan with at least a 5-gallon capacity
  • Safety glasses and nitrile gloves
  • Fire extinguisher rated for class B fires
  • New fuel pump assembly and new fuel filter

Critical Safety Precautions:

  • Relieve the fuel system pressure first. Start the engine, then pull the fuel pump relay or fuse from the fuse box. Let the engine run until it stalls, then turn the ignition off. This depressurizes the fuel lines so gasoline does not spray when you disconnect them.
  • Disconnect the battery before you do any work near the fuel tank or electrical components.
  • Work in a well-ventilated area. If you must work in a garage, open all doors and use a ventilation fan. Never smoke or use any device that creates a flame or spark near the work area.
  • Keep a fire extinguisher nearby rated for class B fires.

Choosing the Right Replacement Pump

The OEM fuel pump module part numbers for the 2012 Regal include:

  • 13578373 for the 2.4L engine
  • 13578363 for the 2.0L turbo
  • 13578374 for the 2.4L with PZEV

When choosing a replacement, you have three main options: OEM, remanufactured, or aftermarket. OEM parts guarantee fit and performance but cost more. Aftermarket parts can save money but quality varies. Remanufactured parts offer a middle ground.

Why You Should Consider a KEMSO Fuel Pump

When it is time to replace the fuel pump on your 2012 Buick Regal, choosing a reliable brand matters. KEMSO specializes in high-performance fuel pumps that are built as OEM replacements—meaning they match the original factory specifications for fit, pressure, and flow. Every KEMSO fuel pump is designed for durability and consistent performance, and they come with a lifetime warranty that gives you peace of mind on the road. If you want a fuel pump that delivers reliable performance without overspending at the dealership, KEMSO is a smart choice.

You can browse the full lineup of KEMSO fuel pumps for the 2012 Buick Regal and many other vehicles by visiting their official website at https://www.kemsoracing.com/. They offer a straightforward ordering process and stand behind their products with a lifetime warranty, which means you can install their pump and not worry about it failing down the road.

Final Thoughts

The 2012 Buick Regal fuel pump is a critical component that sits inside the fuel tank, accessible through a panel under the rear seat on most trims. Recognizing the early warning signs—like hard starting, stalling under load, or a whining noise from the tank—can prevent you from being stranded. A professional replacement costs between $800 and $900, but you can save significantly by purchasing the part yourself and doing the install at home. Whether you choose an OEM part or a high-performance aftermarket option like KEMSO, make sure the replacement is rated for your specific engine configuration. And if you decide to go the DIY route, always follow proper safety procedures when working around fuel. For quality parts with a lifetime warranty, consider KEMSO fuel pumps, available at https://www.kemsoracing.com/.


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