Best Replacement Fuel Pumps for G35 Performance and Reliability

As a G35 owner myself, I know the thrill of its VQ engine and the smooth ride it offers. But over time, like any critical component, the factory fuel pump can start to show its age, leading to frustrating issues like hesitant starts, power loss, or even complete stalls. I’ve been there, digging into the fuel tank area, trying to diagnose those pesky fuel delivery problems. That’s why choosing the best replacement fuel pump for G35 performance and reliability isn’t just about getting your car running again; it’s about ensuring it performs at its peak, reliably, for years to come. In this guide, I’ve sifted through various options, looking at everything from OEM-style replacements to serious performance upgrades, to help you make an informed decision for your beloved G35. We’ll dive into what makes each pump stand out, balancing cost, features, and real-world benefits.

IMAGE	PRODUCT NAME	AMAZON LINK
	DIRBOERF Electric Fuel Pump Assembly Compatible With Nissan…	View on Amazon
	Fuel Sending Unit Pump Module Assembly Compatible With 2003…	View on Amazon
	DWVO Fuel Pump Compatible with 2004 2005 2006 Infiniti…	View on Amazon
	ECCPP Electric Fuel Pump Module Assembly w/Sending Unit…	View on Amazon
	KEMSO 340LPH High Performance Fuel Pump, Replaces Walbro…	View on Amazon
	SCITOO Fuel Pump Electrical Assembly High Performance for…	View on Amazon
	SCITOO Compatible with E8534M Fuel Pump Electrical Assembly…	View on Amazon

1. DIRBOERF Electric Fuel Pump Assembly Compatible With Nissan…

When you’re looking for a straightforward, reliable replacement that won’t break the bank, the DIRBOERF Electric Fuel Pump Assembly is a solid contender. It’s designed to be a direct fit for a range of Nissan and Infiniti models, including certain G35 years, offering a great balance between affordability and dependable operation. I’ve found that these types of units focus on mimicking the original equipment’s function, ensuring your car runs as it should without any surprises. It prides itself on low-noise operation, which is a huge plus for daily driving comfort, and boasts exceptional durability after rigorous testing. This means you can count on it for consistent fuel delivery day in and day out.

Key features:
– Compatible with Nissan 350Z V6 3.5L (2003-2009) and Infiniti G35 V6 3.5L (2004-2006), M35 V6 3.5L (2006-2008), M45 V8 4.5L (2006-2008).
– OE Part Number cross-reference: E8534M, SP4018M, 69868, FG1084, P76334M, F4545A.
– Features a low noise pump for a comfortable driving experience.
– Engineered for exceptional durability and reliable performance under various conditions.
– Comes as a complete Electric Fuel Pump Module Assembly.

Pros:
– Broad compatibility with several Nissan/Infiniti models.
– Offers a good balance of cost and reliability for an OE-style replacement.
– Designed for quiet operation, improving cabin comfort.
– Rigorously tested for long service life.

Cons:
– Specific G35 model years (2004-2006) might not cover all G35 variants.
– Not a performance upgrade, strictly an OE replacement.

Best for: G35 owners seeking a cost-effective, quiet, and reliable OE-style replacement fuel pump.

User feedback summary: Many users appreciate its direct fit and quiet operation, noting that it effectively resolved their fuel delivery issues without any fuss. The perceived quality for the price point is also a common highlight.

2. Fuel Sending Unit Pump Module Assembly Compatible With 2003…

For those with specific early-model G35 Sedans, this Fuel Sending Unit Pump Module Assembly aims to be a precise, direct replacement. It focuses on catering to the 2003-2004 Infiniti G35 Sedan VQ35DE 3.5L, ensuring that you get a component that’s engineered to fit perfectly with those specific vehicle configurations. When you’re dealing with a part as crucial as the fuel pump and sending unit, getting an exact match is key to avoiding installation headaches and ensuring accurate fuel gauge readings. If you’ve got one of these particular G35 Sedans, this option should be high on your list for its targeted compatibility.

Key features:
– Specifically compatible with 2003 2004 Infiniti G35 Sedan VQ35DE 3.5L.
– Replaces OE Part Numbers: 17042-5Y700, 170425Y700, 25060-5Y700, 250605Y700.
– Designed as a complete pump module assembly, likely including the sending unit.

Pros:
– Excellent, precise fitment for its specified G35 Sedan years.
– Direct OE replacement ensures no modification is needed.
– Solves issues related to both fuel delivery and inaccurate fuel gauge readings.

Cons:
– Very limited compatibility, only for specific 2003-2004 G35 Sedans.
– Details on pump performance (flow rate, noise) aren’t explicitly provided.

Best for: Owners of 2003-2004 Infiniti G35 Sedans looking for an exact OEM-style replacement that includes the fuel sending unit.

User feedback summary: Owners frequently comment on the perfect fit and easy installation for the specified models. It successfully addresses both fuel pump failure and erratic fuel gauge readings, making it a reliable fix.

3. DWVO Fuel Pump Compatible with 2004 2005 2006 Infiniti…

The DWVO Fuel Pump offers a step up from basic replacements, aiming to optimize your G35’s performance and fuel efficiency. What caught my eye about this one is its use of an upgraded fourth-generation turbo pump motor, which they claim delivers optimal power and fuel pressure. This isn’t just about getting fuel to the engine; it’s about doing it efficiently, potentially leading to quicker startups and better overall engine response. The focus on injection molding technology for stronger plastic components also suggests a commitment to durability and stability. If you’re looking for an OE-style replacement that might offer a slight edge in efficiency and build quality, this DWVO pump is worth considering.

Key features:
– Compatible with 2004 2005 2006 Infiniti G35.
– Utilizes an upgraded fourth-generation turbo pump motor for optimal power and fuel pressure, enhancing fuel atomization and startup speed.
– Adopts injection molding technology to strengthen plastic components for improved efficiency and stability.
– Designed with strict standards in fit, form, and function for straightforward installation.
– Undergoes rigorous assessment for quiet operation, unmatched performance, and long-lasting durability.

Pros:
– Aims to optimize vehicle performance and fuel efficiency.
– Enhanced fuel pressure and atomization for quicker startups.
– Robust construction with injection molding technology.
– Designed for quiet operation and long-term durability.

Cons:
– Professional installation is highly recommended, which might deter some DIYers.
– Specific G35 years covered, so check compatibility carefully.

Best for: G35 owners looking for an OEM-plus replacement that enhances fuel efficiency and potentially offers snappier throttle response, while maintaining quiet operation.

User feedback summary: Users often report a noticeable improvement in engine performance and quicker starts after installation. The quiet operation is also frequently praised, living up to its claims.

4. ECCPP Electric Fuel Pump Module Assembly w/Sending Unit…

The ECCPP Electric Fuel Pump Module Assembly is a comprehensive solution, though it primarily lists compatibility for Infiniti M35 and M45 models. While not directly listing the G35, given the shared VQ35DE engine platform between G35 and M35, it’s a product some might consider, though extreme caution and cross-referencing for exact fitment are advised. It emphasizes its core function: efficiently drawing and pressurizing fuel to ensure a continuous supply to the injectors. A significant point to note is the disclaimer that it does NOT come with a pressure sensor, meaning you’ll need to reuse your original one. This is a common practice with some aftermarket units to balance cost.

Key features:
– Compatible with 2006-2008 Infiniti M35 V6-3.5L and 2006-2008 Infiniti M45 V8-4.5L.
– Functions to suck, pressurize, and deliver fuel to maintain continuous pressure for injectors.
– DISCLAIMER: ECCPP Fuel Pump DOES NOT come with a pressure sensor; the original black pressure sensor on top must be reused.
– Features a low noise pump, balancing cost and reliability.
– IMPORTANT NOTE: Always match exact part numbers between the new and old part.

Pros:
– Provides a comprehensive fuel delivery solution (minus the sensor).
– Designed for low-noise operation, enhancing driving comfort.
– Good value proposition by balancing cost and reliability.
– Covers essential fuel pump functions effectively.

Cons:
– Does not include the fuel pressure sensor, requiring reuse of the old one.
– Does not explicitly list G35 compatibility; users would need to perform detailed cross-referencing.
– Primarily aimed at M35/M45, which may not be a direct G35 plug-and-play.

Best for: Infiniti M35/M45 owners, or highly experienced DIYers who have thoroughly cross-referenced part numbers and are comfortable reusing their existing fuel pressure sensor for a potentially compatible G35 setup.

User feedback summary: Users praise its quiet operation and reliable fuel delivery, especially for the M35/M45. The need to reuse the pressure sensor is a consistent point but not a deal-breaker for those prepared for it.

5. KEMSO 340LPH High Performance Fuel Pump, Replaces Walbro…

Now, if you’re not just looking to replace a faulty pump but actually upgrade your G35 for serious power, the KEMSO 340LPH High Performance Fuel Pump should be at the top of your list. This isn’t your average OEM replacement; it’s built for performance builds, supporting up to 600 BHP in various applications – naturally aspirated, turbocharged, or supercharged. What’s even better for performance enthusiasts is its E85 compatibility and a higher bypass valve set at 125.8psi, ensuring consistent fuel pressure even under extreme demand. Plus, with USA-based support and a serialized pump body guaranteeing a lifetime warranty, KEMSO stands behind its product with confidence.

Key features:
– Supports up to 600 BHP in naturally aspirated, turbocharged, and supercharged applications.
– USA-based support by USA technicians.
– Designed for gasoline or E85 fuel types.
– Bypass valve set at 125.8psi, higher than many standard and even other performance pumps.
– Serialized fuel pump body guarantees a Lifetime warranty for all its OEM and performance fuel pumps.

Pros:
– Massive fuel flow capability for high-horsepower builds.
– E85 compatible, expanding fuel options for performance.
– Excellent lifetime warranty provides long-term peace of mind.
– USA-based support is a definite advantage for customer service.

Cons:
– May be overkill and potentially louder for a completely stock G35.
– Requires professional installation and potentially fuel system upgrades to fully utilize its capacity.

Best for: G35 owners with forced induction (turbo/supercharger), those running E85, or planning significant engine modifications and power increases.

User feedback summary: Tuner communities consistently report excellent fuel delivery and reliability for high-power applications. While some note it’s slightly louder than stock, it’s an expected trade-off for its performance, and the lifetime warranty is a huge selling point.

6. SCITOO Fuel Pump Electrical Assembly High Performance for…

The SCITOO Fuel Pump Electrical Assembly positions itself as a high-performance option for a broad range of G35 models. What’s particularly appealing here is the extensive G35 fitment, covering Base Sedan, Journey Sedan, and Sport Coupe from 2003-2008. This suggests a versatile option for many G35 owners. It comes as a comprehensive package, often including related parts like a fuel pressure sensor, fuel line, seal ring, and strainer, which can save you the hassle of sourcing these separately. The manufacturer also backs this product with a one-year unlimited-mileage guarantee, giving you confidence in your purchase.

Key features:
– Vehicle Fitment: Compatible with 2003-2008 Infiniti G35 Base Sedan 3.5L, 2007-2008 Infiniti G35 Journey Sedan 3.5L, 2007 Infiniti G35 Sport Coupe 3.5L.
– Reference OE Number: FG262A SCITOO fuel pump.
– Package Contents: Includes the fuel pump assembly and often lists related parts like fuel pressure sensor, fuel line, seal ring, fuel sending unit, wires harness, and strainer.
– Offers a one-year unlimited-mileage guarantee.
– Described as “High Performance” (though specific flow rates aren’t detailed).

Pros:
– Broad compatibility with many G35 models and years.
– Comes as a comprehensive assembly, potentially including many necessary ancillary parts.
– Backed by a one-year unlimited-mileage guarantee.
– Aims for high performance, making it a good upgrade from a failing stock pump.

Cons:
– “High Performance” claim isn’t quantified with specific flow rates (LPH) like dedicated performance pumps.
– Specifics on included related parts can vary, so it’s good to double-check.

Best for: G35 owners seeking a reliable, comprehensive replacement fuel pump that covers a wide range of models/years and comes with a solid warranty, offering a potential performance boost over stock.

User feedback summary: Users report good fitment across various G35 models and appreciate the inclusion of many ancillary parts, making it a convenient “all-in-one” solution. It generally restores reliable fuel delivery without issues.

7. SCITOO Compatible with E8534M Fuel Pump Electrical Assembly…

Another offering from SCITOO, this fuel pump assembly shares many benefits with its sibling (Product 6) but features a different OE reference number (E8534M) and a slightly different, yet still broad, compatibility list. This particular unit is a great option if you own a 2004-2006 G35, or even a Nissan 350Z, M35, or M45, highlighting its versatility across shared platforms. Like the other SCITOO, it’s presented as a high-performance option and includes a one-year unlimited-mileage guarantee. The detailed list of “related parts” that typically come with the assembly is a fantastic bonus, ensuring you have most of what you need for the job.

Key features:
– Vehicle Fitment: Compatible with 2004-2006 Infiniti G35 3.5L, 2006-2008 Infiniti M35 3.5L, 2006-2008 Infiniti M45 4.5L, 2003-2009 Nissan 350Z 3.5L.
– Reference OE Number: E8534M SCITOO fuel pump.
– Package Contents: Includes the fuel pump assembly and typically lists related parts like fuel pump, fuel pressure sensor, fuel line, seal ring, fuel sending unit, wires harness, and strainer.
– Offers a one-year unlimited-mileage guarantee.
– Described as “High Performance.”

Pros:
– Very wide compatibility across G35, 350Z, M35, and M45 models.
– Comes as a comprehensive assembly with many potentially included accessory parts.
– Backed by a one-year unlimited-mileage guarantee for peace of mind.
– A solid choice for restoring or slightly upgrading fuel delivery.

Cons:
– Like the other SCITOO, “High Performance” isn’t quantified, so don’t expect Kemso-level flow without explicit specs.
– Specific G35 model years (2004-2006) might not cover all G35 variants, so check carefully.

Best for: Owners of 2004-2006 G35s, 350Zs, M35s, or M45s looking for a comprehensive, reliable, and warrantied fuel pump assembly.

User feedback summary: Many users highlight its versatility for various Nissan/Infiniti models and the convenience of the included parts. It’s often cited as a cost-effective solution that effectively resolves fuel delivery issues.

Comparison Insights: Finding Your G35’s Perfect Fuel Pump

Choosing the best replacement fuel pump for G35 performance and reliability isn’t a one-size-fits-all decision. When I look at these options, several key differentiators jump out that can help narrow down your choice.

First off, compatibility is king. Some pumps, like the “Fuel Sending Unit Pump Module Assembly” (Product 2), are hyper-specific, targeting just a couple of G35 Sedan years. The DIRBOERF and both SCITOO units offer broader compatibility, often spanning multiple G35 years and even cross-compatible with 350Z, M35, and M45 models. This wide range of fitment can be a huge plus for those who need a versatile part or own multiple Infiniti/Nissan vehicles. However, the ECCPP unit stands out by not explicitly listing G35, focusing on M35/M45 – so if you’re a G35 owner considering that, double and triple-check your part numbers and be prepared for potential adaptation.

Next, consider your performance goals. If your G35 is stock and you just want it running reliably, most of the OE-style replacements like DIRBOERF, DWVO, and the SCITOO units will serve you well. The DWVO even promises a slight edge in fuel efficiency and quicker startups with its fourth-generation turbo pump. But if you’ve got a supercharged G35, or you’re planning a serious turbo build, the KEMSO 340LPH High Performance Fuel Pump is in a league of its own. It’s designed to support big horsepower and is E85 compatible, something the other pumps don’t explicitly claim. You’ll pay for that capability, but it’s essential for high-power applications.

Included components also vary. Some pumps, like the SCITOO assemblies, are quite generous, often bundling in related parts like fuel pressure sensors, strainers, and seals. This can be a huge time and money saver, ensuring you have everything you need for the installation. In contrast, the ECCPP explicitly states it does NOT include the pressure sensor, requiring you to reuse your old one. While not a deal-breaker, it’s an important detail to be aware of.

Finally, warranty and support can really offer peace of mind. KEMSO stands out with its lifetime warranty and USA-based support, which is impressive for a performance part. The SCITOO units offer a one-year unlimited-mileage guarantee, a solid promise for an aftermarket replacement. Always consider how much value you place on long-term coverage.

Ultimately, whether you need a simple fix or a foundation for a high-horsepower monster, understanding these differences will guide you to the fuel pump that best suits your G35’s needs and your driving ambitions.

Final Verdict: Powering Your G35’s Future

Choosing the best replacement fuel pump for G35 performance and reliability really boils down to your specific needs and how you use your car. After diving into these options, here’s my take:

For the Daily Driver & Stock G35 Owner (Reliable OE-Style Replacement):
If your G35 is stock, and you just want a dependable, quiet, and direct replacement without breaking the bank, I’d lean towards the DIRBOERF Electric Fuel Pump Assembly or the DWVO Fuel Pump. The DIRBOERF offers great value and quiet operation, while the DWVO might give you a slight edge in efficiency and startup speed with its upgraded design. Both are solid choices for restoring your G35 to its original factory performance levels. If you have an early 2003-2004 G35 Sedan, the dedicated “Fuel Sending Unit Pump Module Assembly” (Product 2) offers precise fitment.

For the Enthusiast & Mildly Tuned G35 (Performance-Oriented Replacement):
If you’re looking for something that offers a bit more oomph than stock or want a solid foundation for future mild modifications, the SCITOO Fuel Pump Electrical Assemblies (Product 6 & 7) are excellent choices. They claim “High Performance” (though unquantified), offer broad G35 compatibility, and often come as comprehensive kits with many necessary accessories, all backed by a one-year warranty. They represent a strong balance between reliability, performance, and value for an upgraded OE-style pump.

For the Serious Performance Builder (High Horsepower & E85):
There’s really only one contender here if you’re pushing serious horsepower or running E85: the KEMSO 340LPH High Performance Fuel Pump. With its massive flow rate, E85 compatibility, high bypass pressure, and a lifetime warranty, it’s designed specifically to meet the demanding fuel requirements of forced induction and highly modified G35s. It’s an investment, but it’s crucial for reliable power delivery in extreme setups.

Ultimately, remember to always double-check the exact compatibility for your G35’s specific year, model (coupe/sedan), and engine. Investing in the right fuel pump is investing in the heart of your G35’s performance and long-term reliability.

Comprehensive FAQ Section

Q1: Why is a good fuel pump important for my G35’s performance and reliability?
A: The fuel pump is the heart of your G35’s fuel system. It’s responsible for drawing fuel from the tank and delivering it to the engine at a consistent pressure. A healthy fuel pump ensures your engine gets the right amount of fuel at the right time for optimal combustion. A failing or weak pump can lead to common G35 issues like hesitation, misfires, loss of power, poor fuel economy, hard starting, or even complete engine stalls, directly impacting both G35 performance and reliability.

Q2: How do I know if my G35 fuel pump is failing?
A: Common symptoms of a failing fuel pump in your G35 include:
– Whining noise coming from the fuel tank area (louder than normal).
– Difficulty starting the car, especially when cold.
– Engine sputtering or hesitating at high speeds or under acceleration.
– Loss of power during normal driving.
– Engine stalling unexpectedly.
– Lower fuel economy.
– Check Engine Light illuminated with fuel pressure related codes.
If you notice any of these signs, it’s wise to get your fuel pump checked.

Q3: What’s the difference between an OEM and an aftermarket replacement fuel pump for my G35?
A: An OEM (Original Equipment Manufacturer) fuel pump is the exact part that came with your G35 from the factory. Aftermarket pumps are made by other manufacturers to fit your G35. While OEM parts often guarantee precise fit and function, aftermarket options can offer competitive pricing, enhanced features (like higher flow rates for performance), or specialized designs. Our guide covers several quality aftermarket options designed for G35 performance and reliability.

Q4: Can I install a replacement fuel pump myself in my G35, or should I get a professional?
A: Replacing a fuel pump in a G35 can be a challenging DIY job. It often involves accessing the fuel tank (usually from under the rear seat in the G35), dealing with fuel lines, electrical connections, and potentially fuel vapors. While experienced DIYers with the right tools and safety precautions can do it, professional installation is generally recommended, especially for complex assemblies or performance upgrades. Safety around fuel is paramount.

Q5: Should I get a “high-performance” fuel pump for a stock G35?
A: For a completely stock G35, a “high-performance” pump like the KEMSO 340LPH is usually overkill. While it won’t necessarily harm your engine, it might be louder, more expensive, and its full capabilities won’t be utilized without modifications like forced induction (turbo/supercharger) or an E85 conversion. For a stock G35, a quality OE-style replacement (like DIRBOERF or DWVO) will provide excellent G35 performance and reliability without the extra cost or potential noise.

Q6: What should I look for in the best replacement fuel pump for G35 performance and reliability?
A: When choosing a fuel pump for your G35, consider:
– Exact Vehicle Compatibility: Ensure it matches your G35’s year, model (coupe/sedan), and engine size.
– Flow Rate (LPH): For stock, an OE equivalent is fine. For modified cars, choose a higher LPH pump.
– Build Quality: Look for durable materials and rigorous testing.
– Noise Level: Some aftermarket pumps can be louder than stock.
– Included Components: Does it come as a complete assembly with a sending unit, strainer, and seals?
– Warranty: A good warranty indicates manufacturer confidence.
– Fuel Compatibility: If you plan to run E85, ensure the pump is rated for it.

Q7: How does E85 compatibility affect my fuel pump choice for a G35?
A: E85 (ethanol fuel) is highly corrosive compared to gasoline. If you plan to run E85 in your G35, you must choose a fuel pump explicitly rated as E85 compatible. Using a non-E85 compatible pump with ethanol will quickly degrade its internal components, leading to pump failure and potential engine damage. The KEMSO 340LPH pump in our review is a prime example of an E85-compatible option.