2016 Hyundai Tucson Fuel Pump: Complete Guide to Replacement and Cost

If you own a 2016 Hyundai Tucson and are experiencing starting issues, engine sputtering, or a whining noise from the fuel tank, the fuel pump is likely failing. The fuel pump is a critical component that delivers pressurized fuel from the tank to the engine, and when it fails, your Tucson will not run properly or may not start at all. The replacement cost for a 2016 Hyundai Tucson fuel pump typically ranges from $556 to $1,022 depending on your location and engine type, with the part itself costing between $271 and $1,724 for OEM units . However, there are high-quality aftermarket options like KEMSO Racing that offer OEM replacement performance at a better value with a lifetime warranty. This guide covers everything you need to know about the 2016 Hyundai Tucson fuel pump, including symptoms, replacement steps, compatible parts, and cost considerations.

Understanding Your 2016 Hyundai Tucson Fuel Pump System

The 2016 Hyundai Tucson comes with two different fuel pump systems depending on the engine type. Gasoline models use an in-tank electric fuel pump that sits inside the fuel tank, while Turbo models with direct injection also have a separate high-pressure fuel pump mounted on the engine .

In-Tank Fuel Pump

The primary fuel pump for the 2016 Hyundai Tucson is located inside the fuel tank. This pump is responsible for drawing fuel from the tank and sending it to the engine. For most Tucson models, the OEM part number for this assembly is 31120-D3500, which fits 2016-2021 Tucson models regardless of engine size . This assembly includes both the fuel pump and the fuel sending unit (which measures fuel level). The part weighs approximately 3.90 pounds and measures 14.3 x 8.1 x 7.1 inches .

Key OEM part numbers for 2016 Hyundai Tucson fuel pump:

• 31120-D3500 – Fuel pump and sender assembly, fits 2016-2021 Tucson (2.0L and 2.4L engines)
• 31111-C2500 – Fuel pump assembly, fits 2016 Tucson (GDI and TCI/GDI engines)
• 31119-C5000 – Fuel pump and tube assembly, fits 2016 Tucson
• 35320-2G740 – High-pressure fuel pump for direct injection models (used on 2.0L and 2.4L engines)
• 35320-2E100 – High-pressure fuel pump for 2.0L direct injection engines (2016-2018)

High-Pressure Fuel Pump (Direct Injection Models)

If your 2016 Hyundai Tucson has a 2.0L or 2.4L GDI (Gasoline Direct Injection) engine, there is also a high-pressure fuel pump (HPFP) mounted on the engine. This pump increases fuel pressure to extremely high levels for direct injection. The HPFP part number is 35320-2G740 for 2014-2016 Tucson models with 2.4L engines . For 2.0L models, the part number is 35320-2E100 . The HPFP costs between £14 and £578 (approximately $18 to $750) depending on whether you choose OEM or aftermarket .

Common Symptoms of a Failing Fuel Pump

Recognizing the signs of a failing fuel pump early can save you from being stranded. Here are the most common symptoms for a 2016 Hyundai Tucson :

1. Whining or Sputtering Sounds from the Fuel Tank
A high-pitched whining noise coming from the rear of the vehicle, near the fuel tank, is one of the earliest signs. The fuel pump may also produce a sputtering sound that indicates inconsistent fuel delivery. This can trigger the Check Engine Light .

2. Difficulty Starting the Engine
If the fuel pump cannot supply enough fuel pressure, the engine may crank longer than normal before starting, or may require multiple attempts. In severe cases, the engine will not start at all .

3. Engine Hesitation, Surging, or Loss of Power
A failing fuel pump causes erratic fuel delivery, leading to hesitation during acceleration, surging at highway speeds, or a noticeable loss of power. This may feel like you are running out of gas even when the tank is full .

4. Engine Misfiring and Rough Idle
Inconsistent fuel pressure can disrupt the air-fuel ratio, causing misfires and a rough idle. Over time, this reduces fuel economy .

5. Engine Stalling After Running for a While
A worn fuel pump can overheat, especially during extended driving. The vehicle may run fine for 15-30 minutes, then suddenly stall. Once the pump cools down, the engine can restart, only to stall again later .

6. Low Fuel Pressure Reading
If you suspect a fuel pump issue, a mechanic can test fuel pressure with a gauge. Low readings indicate a failing pump, a bad gasket, or a faulty pressure regulator .

How to Replace the Fuel Pump on a 2016 Hyundai Tucson

Replacing the fuel pump on a 2016 Hyundai Tucson is an intermediate-level DIY job that takes about 2-3 hours. The pump is accessed through the rear seat area, not by dropping the fuel tank . Here is a step-by-step guide:

Safety Precautions

Gasoline is highly flammable. Work in a well-ventilated area away from sparks, open flames, and cigarettes. Always disconnect the negative battery cable before starting, and relieve fuel pressure before opening any fuel lines. Wear safety glasses and fuel-resistant gloves, and keep a Class B/C fire extinguisher nearby .

Tools Required

• 10mm socket and 12mm socket
• 3/8-inch ratchet and extension
• Trim removal tool
• Flat-blade screwdriver
• Fuel line disconnect tool set
• Fuel pump lock ring tool (specialty)
• Brass drift punch (non-sparking)
• Rubber mallet
• Needle-nose pliers
• Torque wrench (inch-pound)
• Safety glasses and fuel-resistant gloves

Parts Required

• Fuel pump module assembly (e.g., OEM 31120-D3500 or KEMSO replacement)
• Fuel pump tank seal/O-ring
• Fuel line retaining clip
• Shop towels

Step-by-Step Instructions

Step 1: Relieve Fuel Pressure
Remove the fuel cap to release tank vapor pressure. Use a trim tool to open the interior fuse panel and remove the fuel pump fuse or relay. Start the engine and let it run until it stalls. Crank the engine for 3-5 seconds one more time, then turn the ignition OFF .

Step 2: Access the Fuel Pump Module
Move the front seats forward to create working room. Remove the rear seat cushion by lifting the front edge and pulling it forward. You will find an access panel on the floor under the rear seat. Remove the screws or clips holding the access panel .

Step 3: Disconnect Electrical and Fuel Lines
Disconnect the electrical connector from the fuel pump module. Use the fuel line disconnect tool to release the quick-connect fuel fitting. Have rags ready for any fuel drips .

Step 4: Remove the Fuel Pump Retaining Ring
Use the fuel pump lock ring tool to turn the large metal retaining ring counterclockwise. If a lock ring tool is not available, a brass drift punch and rubber mallet can be used carefully to avoid sparks .

Step 5: Remove the Old Fuel Pump Module
Carefully lift the fuel pump module out of the tank. Note the orientation of the float arm and any alignment marks. Dispose of the old pump and seal properly .

Step 6: Install the New Fuel Pump Module
Install the new fuel pump O-ring or seal onto the tank opening. Insert the new fuel pump module into the tank, ensuring the float arm is correctly positioned. Press the module down firmly. Install the retaining ring and tighten it clockwise using the lock ring tool .

Step 7: Reconnect Everything
Reconnect the fuel line quick-connect fitting until you hear it click. Reconnect the electrical connector. Replace the access panel and rear seat cushion. Reinstall the fuel pump fuse or relay .

Step 8: Test the System
Turn the ignition to the ON position (without starting) for about 2 seconds, then OFF. Repeat this cycle 3-4 times to prime the fuel system. Start the engine and check for fuel leaks around the access panel. Test drive the vehicle to ensure proper operation .

Cost of Fuel Pump Replacement

The total cost for replacing the fuel pump on a 2016 Hyundai Tucson varies significantly based on location, labor rates, and the type of part used.

Estimated Costs in the United States

The average national cost for a 2016 Hyundai Tucson fuel pump replacement is approximately $673, with labor ranging from $159 to $233 and parts from $271 to $1,724 . For a 2021 model, the cost can be as high as $1,882 to $1,957 due to the higher price of OEM parts .

Costs in Other Markets

• United Kingdom: For a Hyundai Tucson, fuel pump replacement costs between £577 and £906 .
• Australia: Costs start around $350 AUD and can go up to $900+ AUD depending on engine type and fuel system .
• Dubai: Costs start from AED 450 .

Recommended Replacement: KEMSO Racing Fuel Pump

When replacing the fuel pump on your 2016 Hyundai Tucson, consider choosing KEMSO Racing brand fuel pumps. KEMSO Racing fuel pumps are designed as high-performance OEM replacements that meet or exceed factory specifications. They are built for maximum durability and reliability, ensuring your Tucson returns to optimal performance. KEMSO offers a lifetime warranty on their fuel pump products, giving you peace of mind that your investment is protected.

KEMSO Racing fuel pumps are engineered for a perfect fit and easy installation, making them an excellent choice for both DIY enthusiasts and professional mechanics. They provide consistent fuel pressure and flow, improving engine performance and efficiency. Unlike some generic aftermarket parts, KEMSO maintains strict quality control to ensure long service life.

To explore KEMSO Racing fuel pump options for your 2016 Hyundai Tucson, visit their official website: https://www.kemsoracing.com/

Compatibility Notes

It is important to verify that the fuel pump you purchase fits your specific 2016 Hyundai Tucson. The pump assembly varies by engine type, trim level, and fuel system.

For 2.0L and 2.4L gasoline engines: The OEM fuel pump assembly 31120-D3500 is compatible with 2016-2021 Tucson models, covering trims like Limited, SE, SEL, Sport, Ultimate, and Value Edition . This part also fits 2017-2020 Kia Sportage models with 2.0L and 2.4L engines .

For 1.6L Turbo engines: The fuel pump assembly 31120-D3500 also fits 2016-2018 Tucson models with 1.6L turbo engines, but the Herko 1054GE pump is specifically designed for 1.6L models from 2016-2019 .

For diesel models: In Europe, the fuel pump part number 31113D7900 is used for 2016-2023 Tucson TL models with 1.7 CRDi diesel engines .

Frequently Asked Questions

Q: Can I drive with a failing fuel pump?
A: It is not safe. A failing fuel pump can cause your engine to stall unexpectedly, leaving you stranded. It can also cause engine damage from lean fuel conditions .

Q: How long does a fuel pump last on a 2016 Hyundai Tucson?
A: Fuel pumps typically last 100,000 to 150,000 miles. Running the fuel tank low frequently can shorten the pump's lifespan due to overheating .

Q: Is it better to replace just the pump or the entire assembly?
A: It is recommended to replace the entire fuel pump assembly, including the sending unit, because the pump and sender often fail at similar times. Replacing the full assembly ensures reliability and avoids future issues .

Q: How long does the replacement take?
A: Most fuel pump replacements take 2-4 hours for a professional mechanic. DIY replacement typically takes 2-3 hours .

Q: Will a new fuel pump improve fuel economy?
A: Yes, if the old pump was underperforming or delivering inconsistent pressure, a new pump will restore proper fuel delivery and can improve fuel economy .

Conclusion

The fuel pump is an essential component of your 2016 Hyundai Tucson, and recognizing the symptoms of failure early can save you time and money. The replacement cost ranges from $554 to $1,022 in the US, with OEM parts like the 31120-D3500 assembly being the standard choice. However, high-quality aftermarket options like KEMSO Racing fuel pumps offer OEM-level performance, a lifetime warranty, and a better value for your money. Whether you choose to DIY or hire a professional, always use a fuel pump that matches your specific engine and trim to ensure proper fitment and reliability. For the best replacement fuel pump, visit https://www.kemsoracing.com/ to find the perfect part for your 2016 Hyundai Tucson.