Mishimoto MMFS-350Z-03 Features and Benefits
Dual High-Flow Electric Cooling Fans
The Mishimoto 350Z fan shroud kit includes two slim electric fans, each rated at more than 900 CFM of airflow.
Together, the fans provide a combined manufacturer-rated airflow exceeding 1,800 CFM before accounting for radiator restriction and installed operating conditions.
This dual-fan configuration helps support radiator airflow during low-speed driving, extended idling, and demanding driving conditions.
Lightweight Aluminum Fan Shroud
Unlike conventional molded fan shrouds, the Mishimoto assembly uses lightweight aluminum construction. Check your cooling system for leaks using this guide.
The silver aluminum finish also provides a clean, performance-inspired appearance that complements other aftermarket engine bay upgrades.
Improved Radiator Airflow
The fan shroud helps guide air through the radiator core, reducing airflow bypass around the fans.
This is particularly important when the vehicle is stationary or traveling at low speeds, when natural airflow is limited.
Direct-Fit Nissan 350Z Design
Designed for 2003–2006 Nissan 350Z applications, the MMFS-350Z-03 offers a vehicle-specific fit without requiring fabrication of a universal fan mounting system.
The assembly is advertised as plug-and-play, although electrical connectors, fan controls, and clearance should always be verified for the specific vehicle.
OEM and Mishimoto Radiator Compatibility
The Mishimoto MMFS-350Z-03 is designed for use with compatible factory Nissan radiators and Mishimoto performance radiators.
This flexibility makes it useful for both cooling system repairs and complete performance radiator upgrades.
Mishimoto Lifetime Warranty
The assembly is backed by Mishimoto’s Lifetime Warranty, subject to the manufacturer’s coverage terms.
Mishimoto MMFS-350Z-03 Technical Specifications
| Specification | Details |
|---|---|
| Manufacturer | Mishimoto |
| Part Number | MMFS-350Z-03 |
| Product Type | Aluminum Radiator Fan Shroud Kit |
| Vehicle Fitment | Nissan 350Z, 2003–2006 |
| Engine Platform | Nissan VQ35 V6 |
| Shroud Material | Aluminum |
| Finish | Silver |
| Fan Configuration | Dual electric slim fans |
| Airflow | Over 900 CFM per fan |
| Combined Free-Air Rating | Over 1,800 CFM |
| Height | 18.7 inches |
| Length | 28.5 inches |
| Width | 3.5 inches |
| Radiator Compatibility | Compatible OEM and Mishimoto radiators |
| Warranty | Mishimoto Lifetime Warranty |
Fitment note: Confirm radiator dimensions, mounting points, electrical connections, fan controls, and clearance before installation, especially on modified vehicles.
Why Radiator Fans Matter on the Nissan VQ35 Engine
The VQ35 engine generates substantial heat during normal operation, and cooling system demands increase during extended high-load driving.
Although the radiator dissipates engine heat, electric cooling fans help maintain airflow when the vehicle isn’t moving fast enough to push sufficient air through the radiator.
A failing radiator fan can cause symptoms such as:
- Engine temperature rising while idling or sitting in traffic.
- Coolant temperatures dropping once the vehicle starts moving.
- Inconsistent air-conditioning performance at low speeds.
- Cooling fans failing to activate when commanded.
- Excessive engine temperatures during extended low-speed operation.
However, these symptoms can also indicate electrical problems, coolant circulation restrictions, or thermostat failures.
Before replacing the cooling fans, inspect the entire system.
Our Complete Car Cooling System Guide explains how cooling components work together and why diagnosing overheating correctly matters.
How to Install a Mishimoto Fan Shroud on a Nissan 350Z
The Mishimoto MMFS-350Z-03 is engineered as a direct-fit cooling fan upgrade for compatible 2003–2006 Nissan 350Z models.
Installation generally involves removing the original fan assembly, positioning the Mishimoto shroud, securing the mounting hardware, and connecting the electrical system.
Step 1: Prepare the Vehicle
Park your Nissan 350Z on a level surface and allow the engine to cool completely.
Disconnect the negative battery terminal before working around the electric cooling fans, which may activate unexpectedly.
Inspect the radiator, coolant hoses, and surrounding engine bay components for leaks or damage.
Step 2: Remove the Factory Cooling Fan Assembly
Disconnect the factory cooling fan electrical connectors.
Remove the appropriate mounting fasteners and carefully extract the original fan shroud assembly.
Avoid damaging the radiator fins, coolant hoses, and nearby wiring.
Step 3: Install the Mishimoto Aluminum Fan Shroud
Position the Mishimoto MMFS-350Z-03 assembly against the radiator.
Confirm proper alignment with the intended mounting locations and verify clearance around both fan motors and blades.
Secure the assembly using the appropriate mounting hardware and manufacturer’s installation instructions.
Step 4: Connect and Test the Electric Fans
Connect the cooling fan wiring using the manufacturer-approved electrical configuration.
Verify that both fans operate when commanded and that fan direction produces the correct airflow through the radiator.
Do not assume a connector that physically fits guarantees electrical compatibility.
Step 5: Verify Cooling System Operation
Start the engine and allow it to reach normal operating temperature while monitoring coolant temperature.
Confirm proper cooling fan operation, inspect for unusual vibration, and check that the assembly remains secure.
If coolant hoses were disconnected or coolant was drained, the cooling system must be refilled and properly bled.
Refer to our DIY cooling system resources at My Pro Street for additional maintenance information.
Pair Your Mishimoto Fan Shroud with a Performance Radiator
A high-flow cooling fan assembly works best when the radiator itself is in good condition.
If your 350Z still uses an aging factory radiator, upgrading both components may improve overall cooling system reliability.
A performance aluminum radiator can provide increased cooling capacity, while the Mishimoto fan shroud helps maintain airflow through the radiator during low-speed operation.
Consider inspecting these additional cooling components during installation:
Performance Aluminum Radiator: An upgraded radiator can increase heat rejection capability, depending on its design and operating conditions.
Radiator Hoses: Replace cracked, swollen, or deteriorated hoses before they cause coolant leaks.
Thermostat: A malfunctioning thermostat can restrict coolant circulation and cause overheating.
Coolant and Radiator Cap: Proper coolant chemistry and cooling system pressure are essential for reliable engine temperature control.
Cooling System Electrical Components: Inspect fan wiring, relays, fuses, and control circuits to ensure the new fans operate correctly.
Explore performance cooling components, radiators, and engine upgrades at Pro Street Online.
Is the Mishimoto MMFS-350Z-03 Worth It for Your 350Z?
For Nissan 350Z owners looking to improve radiator airflow, the Mishimoto MMFS-350Z-03 offers several advantages over a worn or damaged factory cooling fan assembly.
Its lightweight aluminum construction, dual high-flow electric fans, and vehicle-specific design make it an attractive option for performance builds and cooling system upgrades.
The kit is particularly appealing for owners who want to:
- Replace a failing factory cooling fan assembly.
- Improve airflow through a compatible radiator.
- Upgrade their engine bay with aluminum performance components.
- Support cooling performance during demanding low-speed driving.
- Pair a Mishimoto performance radiator with a matching fan shroud.
Keep in mind that a high-flow fan shroud cannot compensate for every cooling system problem. A clogged radiator, failing water pump, trapped air, or faulty thermostat must still be addressed.
Upgrade Your Nissan 350Z Cooling System at Pro Street Online
Whether you’re restoring a first-generation Nissan 350Z or building a dedicated weekend performance car, reliable engine cooling should never be an afterthought.
The Mishimoto MMFS-350Z-03 Aluminum Radiator Fan Shroud Kit combines dual electric cooling fans, lightweight aluminum construction, and direct-fit engineering to support effective radiator airflow.
With over 900 CFM of manufacturer-rated airflow per fan and compatibility with supported OEM and Mishimoto radiators, this cooling upgrade is designed for Nissan enthusiasts who demand dependable performance.
Shop Nissan 350Z performance cooling upgrades, radiator fan shrouds, and aftermarket engine components at www.ProStreetOnline.com.
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