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A properly functioning cooling system is essential to keep your Infiniti Q50 running reliably and avoid engine damage from overheating. Choosing the right radiator affects cooling efficiency, durability, and how often you need maintenance. This guide covers seven shortlisted radiators chosen for compatibility and performance with the Infiniti Q50. We evaluated each option for construction quality, core design, and cooling performance to help you find the right replacement. Read on to see the factors we used and what matters most when selecting a radiator.
Looking for other parts? See all Infiniti Q50 parts & accessories.
Top Picks at a Glance
| Best Reviewed A top-rated pick with lots of positive feedback | KAX CU13440 Engine Cooling Radiator for Infiniti Q50 (Main Radiator) |  |
| Most Popular A crowd favorite that many people choose with confidence | DWVO Radiator Compatible with Infiniti QX60 / Infiniti JX35 / Pathfinder (CU13348) |  |
| Best Quality Built to a higher standard if you want something more solid | PACIFIC BEST INC. Replacement Radiator for 2013-2019 Nissan Pathfinder JX35 3.5L V6 |  |
| Best Budget The cheapest option that still gets the job done reliably | SCITOO Radiator for 1993–2001 Nissan Altima 2.4L (Model 164598) |  |
| Most Sold A high-volume bestseller chosen again and again | Spectra Premium CU2691 Complete Radiator with TOC |  |
| Best Value for Money The sweet spot between price and what you get | AUTOSAVER88 Radiator for 2014–2018 Infiniti Q50 V6 3.5L/3.7L |  |
| Best Overall The best all-around choice for most situations | TRQ Radiator Assembly Aluminum Core 1-Row Compatible with Infiniti Q50 3.0L |  |
1. KAX CU13440 Engine Cooling Radiator for Infiniti Q50 (Main Radiator)
| Compatible vehicles | 2014-2015 Q50 3.7L; 2014-2018 Q50 3.5L |
|---|---|
| Core flow type | Down Flow |
| Transmission oil cooler | Yes |
| OEM part numbers replaced | 2219458, 13440C, 4113440, CU13440 |
This KAX CU13440 radiator is a direct-fit replacement intended for Infiniti Q50 3.5L and 3.7L models and is used to restore the vehicle's engine cooling system after a leak or failure. It replaces multiple factory part numbers and includes a TIG-welded aluminum core with multi-louvered fins and PA66 GF30 plastic tanks to improve heat dissipation and resist corrosion. The unit supports the transmission oil cooler lines and is packaged with reinforced shockproof materials to reduce transit damage. In practice the radiator installs like a factory-style item and reviewers report good fitment and reliable cooling once installed, though some buyers needed fittings or extra sealing on the transmission cooler connections. The manufacturer states leak and durability testing to IATF16949 standards and offers two-year quality support, which suits owners who prioritize reliability. Buyers should plan professional installation and verify that any cooler line fittings or isolator mounts are available, since those small parts are not always included.
Best for: Reliability-focused Infiniti Q50 owners who want a factory-quality replacement to restore consistent cooling and avoid repeat repairs.
Less Ideal for: Drivers seeking a budget quick-fix or a DIY project who do not want to source additional fittings or pay for professional installation should consider simpler or complete kits with included hardware.
- Direct-fit replacement for Infiniti Q50 3.5L and 3.7L models to simplify installation
- Aluminum core with multi-louvered fins for improved heat dissipation and corrosion resistance
- Includes transmission oil cooler passages so no separate cooler is required
- Reinforced packaging reduces risk of transport damage and arrives in good condition
- Manufacturer reports leak and durability testing and offers two-year support
- Some units may not include transmission cooler fittings or rubber isolator mounts requiring additional parts or prep
- Installation is recommended for professionals which adds labor cost
Verdict A reliable, factory-style radiator replacement for Infiniti Q50 owners who prioritize long-term cooling performance, provided you confirm fittings and plan professional installation.
2. DWVO Radiator Compatible with Infiniti QX60 / Infiniti JX35 / Pathfinder (CU13348)
| Compatible engines | 2.5L, 3.5L V6, L4 |
|---|---|
| Fitment years | 2013–2020 (vehicle-specific) |
This DWVO complete radiator is a direct replacement intended to restore cooling to compatible vehicles by matching factory mounting points and connections. It is typically used when the original radiator has cracked, leaked, or lost cooling capacity; install replaces the core, tanks, and oil cooler provisions in one unit. Notable features include a high-density multi-louvered aluminum core for improved heat transfer, TIG-welded joints, and treated coating to resist corrosion. The package is delivered with protective corner foam and a user manual but does not include a radiator cap. In practice the radiator installs like a factory replacement and many buyers report straightforward fit and stable engine temperature after installation. Quality appears variable across units: several customers report solid fit and leak-free service while others found early leaks or weaker plastic tanks requiring sealant. Professional installation is recommended because reuse of some original mounting hardware and attention to oil cooler and sensor fittings matter for a reliable seal. This radiator is a practical option for replacing a failed unit but expect some variability in build consistency compared with higher-end factory-quality parts.
Best for: Convenience-driven buyers seeking a ready-to-install replacement that restores cooling quickly without sourcing multiple parts, and who prioritize a straightforward swap to get the vehicle back on the road.
Less Ideal for: Shoppers who want guaranteed factory-quality longevity or who prefer fully OEM-sourced parts for long-term ownership should consider higher-end factory replacement radiators instead.
- Direct-fit replacement intended to match factory mounting and hose locations
- High-density multi-louvered aluminum core designed for efficient heat transfer
- TIG-welded joints and corrosion-treated coating for improved durability
- Arrives with protective foam packaging to reduce shipping damage
- Does not include radiator cap or certain small fittings which must be reused or purchased separately
- Build quality appears inconsistent with some reports of leaks or weaker plastic tank seams
Verdict A cost-effective, direct-fit replacement that gets a compatible Infiniti cooling system back to working order quickly, but expect some variability in build quality.
3. PACIFIC BEST INC. Replacement Radiator for 2013-2019 Nissan Pathfinder JX35 3.5L V6
| Manufacturer | PACIFIC BEST INC. |
|---|---|
| Core Type | Aluminum core |
| Tank Material | Plastic tank |
| Rows | 1-Row |
| Manufacturer Part Number | CD13348 |
This PACIFIC BEST INC. radiator is a direct replacement designed to match factory fit and cooling performance for the specified vehicle application. It is a single-row aluminum-core radiator with plastic tanks engineered to OEM-style dimensions for an easier drop-in installation and is typically used when a worn, leaking, or failed radiator needs full replacement. The aluminum core helps heat transfer while the single-row design keeps the unit compact and simpler to service. Buyers will appreciate the vehicle-tested fitment claim and the included manufacturer warranty for peace of mind. The practical limitations are the single-row construction which offers less cooling capacity than multi-row or performance radiators and may run warmer under sustained heavy loads or towing. Installation should be straightforward for a pro or competent DIYer, but users seeking maximum cooling for track or heavy-duty towing duty should consider multi-row or high-performance aftermarket radiators instead.
Best for: Performance-oriented buyers who prioritize reliable, factory-quality replacements that restore proper cooling without extensive modification.
Less Ideal for: Drivers who regularly tow heavy loads, run high-boost tuning, or track the vehicle should look at multi-row or high-capacity performance radiators instead.
- Direct, vehicle-tested drop-in fit for the listed application
- Aluminum core improves heat transfer compared with older all-plastic designs
- Factory-style plastic tanks keep weight and cost down
- Comes from a parts brand with a stated manufacturer warranty
- Single-row core offers less cooling headroom than multi-row performance radiators
- Plastic tanks are less impact-resistant than full-metal radiators
Verdict A factory-style single-row replacement that restores reliable cooling for stock applications but is not the top choice for heavy-duty or high-performance cooling needs.
4. SCITOO Radiator for 1993–2001 Nissan Altima 2.4L (Model 164598)
| Fitment | 1993-2001 Nissan Altima 2.4L |
|---|---|
| Transmission Oil Cooler Included | Yes |
| Inlet Diameter | 1 3/8in. |
| Outlet Diameter | 1 3/8in. |
| Row Count | 1 Row |
This SCITOO radiator is a direct-fit replacement intended to restore cooling performance for the specified vehicle application. It installs like a factory-style unit and includes transmission oil cooler passages, so it handles both engine and transmission cooling duties where applicable. The single-row core and specified inlet/outlet diameters mean it is compact and straightforward to plumb into the stock hoses. Buyers will appreciate the emphasis on fit and ease of installation for a budget-focused repair or swap. Limitations to consider are the single-row core and relatively narrow core thickness, which offer adequate cooling for stock engines but may be marginal under heavy towing, performance tuning, or sustained high-load driving. The radiator’s construction and finish appear aimed at cost-conscious replacement rather than premium longevity, so expect standard service life for an aftermarket budget unit. For a straightforward, affordable radiator swap this unit covers the basics well, but high-demand use cases may justify upgrading to a thicker or multi-row core later.
Best for: Budget-conscious buyers seeking a low-cost, no-frills replacement to get a vehicle back on the road with minimal installation hassle.
Less Ideal for: Drivers who use their vehicle for heavy towing, track use, or high-performance builds should consider a thicker multi-row radiator with higher cooling capacity instead.
- Direct-fit design for a drop-in installation compatible with the listed vehicle application
- Includes transmission oil cooler passage for combined engine and transmission cooling
- Compact single-row core simplifies plumbing and reduces fitment issues
- Affordable option that restores cooling without major modification
- Single-row, relatively thin core limits cooling headroom for heavy-duty or performance use
- Likely shorter service life and corrosion resistance compared with premium radiators
Verdict A wallet-friendly, direct-fit replacement radiator that restores basic cooling for compatible vehicles but lacks the extra capacity and durability needed for high-demand use.
5. Spectra Premium CU2691 Complete Radiator with TOC
| Item model number | CU2691 |
|---|---|
| Manufacturer | Spectra Premium |
| OEM Part Number | 21460ZC00A; 214607S000; 21460ZZ90A; 21460ZQ00A; 214609FD0A; 214609FD0B; 214609FD1B; 21460ZC00B; 21460ZV00A; 214607S00A |
| Compatible vehicles | Nissan Armada, Titan, INFINITI QX56 (listed compatibility) |
This Spectra Premium CU2691 is a complete replacement radiator designed to drop into compatible vehicles without modifications. It pairs a high-density fin core with a transmission oil cooler provision (TOC) so it handles both engine and transmission cooling duties in one unit. Typical use is straightforward: remove the failed unit, transfer any small clips or sensors, and install the drop-in radiator using the included accessory pack. The practical benefits include factory-quality fit intent, improved heat transfer from multi-louvered fins, and a preassembled transmission cooler that saves installation steps. Buyers should note packaging and shipping damage have been reported by some customers, so inspect the unit on arrival; a few reviews also mention minor fitment clips or mounting pins arriving broken and requiring simple repair. The radiator is presented as a like-for-like replacement and is best for routine cooling system service rather than performance upgrades or heavy-duty towing beyond factory expectations.
Best for: A risk-averse mainstream buyer seeking a reliable, factory-replacement cooling part for routine service and repair on their Infiniti Q50, prioritizing correct fit and predictable performance over aftermarket upgrades.
Less Ideal for: Not intended for owners seeking high-performance or heavy-duty cooling upgrades for frequent towing or track use; those buyers should consider performance-oriented radiators designed for higher loads.
- Designed for direct drop-in fit to match factory installation
- High-density multi-louvered fins for improved heat transfer
- Includes transmission oil cooler provision to simplify installation
- Comes with accessory pack to ease replacement tasks
- Some customers report inadequate shipping protection leading to bent fins or damaged mounting tabs
- Occasional broken or missing small mounting clips reported requiring minor fixes
Verdict A practical, factory-quality replacement radiator that fits like the original and restores reliable cooling, but inspect for shipping damage on arrival.
6. AUTOSAVER88 Radiator for 2014–2018 Infiniti Q50 V6 3.5L/3.7L
| Compatibility | 2014–2018 Infiniti Q50 V6 3.5L/3.7L |
|---|---|
| Core material | Aluminum core |
| Tank material | PA66 GF30 plastic |
| OEM part numbers | 214104GA5A, 214604GB5A, 214604GZ5A, IN3010209 |
This AUTOSAVER88 radiator is a complete direct-fit replacement for 2014–2018 Infiniti Q50 V6 3.5L and 3.7L engines. It installs in place of the factory unit and is built with an aluminum core, integrated oil cooler, and high-density multi-louvered fins to improve heat transfer and help the engine reach and maintain safe temperatures. The tanks use PA66 GF30 plastic and the assembly is leak-tested at the factory, which aims to deliver service life comparable to a factory-quality part. Typical use is a vehicle-level repair when the original radiator is leaking, clogged, or underperforming; professional installation is recommended since the radiator cap is not included. Customer feedback shows many clean fits and reliable cooling, though a small number report early leaks, so careful post-install inspection is wise. For a buyer focused on value this radiator offers OEM-style fitment and enhanced cooling features at a fraction of dealer cost, with the caveat that material durability can vary between units.
Best for: Practical optimizers seeking a lower-cost, factory-style replacement that restores cooling performance without paying dealer prices or overbuying premium upgrades.
Less Ideal for: Buyers who want a lifetime performance guarantee or those unwilling to inspect and verify parts after installation should consider higher-end or dealer-supplied options.
- Direct-fit design for 2014–2018 Infiniti Q50 V6 for easier installation
- Aluminum core with multi-louvered fins and built-in oil cooler improves cooling efficiency
- PA66 GF30 plastic tanks and factory leak testing designed to reduce early failures
- Includes complete radiator assembly so you replace the whole unit rather than repairing components
- Radiator cap not included so additional purchase or reuse of the original cap is necessary
- Some reviewers reported occasional early leaks indicating variability in long-term durability
Verdict A cost-conscious, direct-fit radiator that restores factory cooling performance for Infiniti Q50 V6s while delivering good value with some variability in long-term durability.
7. TRQ Radiator Assembly Aluminum Core 1-Row Compatible with Infiniti Q50 3.0L
| Core Row Quantity | 1 |
|---|---|
| Core Material | Aluminum |
| Transmission Oil Cooler Type | Concentric |
| Fitment | Infiniti Q50 2016-2022 V6 3.0L with standard cooling |
This TRQ radiator is a direct-fit replacement for Infiniti Q50 V6 3.0L models with standard cooling and installs the same way a factory unit would. It uses a single-row aluminum core and includes a built-in concentric transmission oil cooler, so it handles both engine cooling and transmission cooling duties without separate components. Typical use is a like-for-like swap when the factory radiator leaks or fails; preassembled mounting points and standard inlet/outlet locations mean most technicians or competent DIYers can complete the job with basic tools and the step-by-step videos TRQ provides. The practical benefits are straightforward: predictable fitment to the specified Q50 years, lightweight aluminum core for good heat transfer, and built-in transmission cooling to simplify replacement. Limitations to consider are the single-row core thickness, which offers less cooling capacity than multi-row performance radiators, and the plastic tanks that are common at this price point and can be more vulnerable to impact or long-term heat cycling than all-metal designs.
Best for: Balanced owners who want a reliable, factory-style replacement for routine repairs on an Infiniti Q50 and prefer a product that balances cost, ease of installation, and dependable cooling.
Less Ideal for: Drivers who need extra cooling for track use, heavy towing, or aggressive performance modifications should consider a multi-row or heavy-duty radiator instead.
- Direct-fit design for 2016–2022 Infiniti Q50 V6 3.0L with standard cooling reducing installation time
- Single-row aluminum core provides efficient heat transfer for typical street driving
- Integrated concentric transmission oil cooler removes the need for a separate cooler
- Preassembled mounting points and manufacturer installation videos simplify DIY replacement
- Single-row core offers less cooling margin than multi-row or high-performance radiators
- Plastic end tanks are less durable under heavy-duty use or repeated heat cycling
Verdict A practical, direct-fit aluminum radiator for Q50 owners who want a cost-effective factory-style replacement rather than a high-capacity performance unit.
Choosing the Right Infiniti Q50 Radiator: Key Factors to Consider
Cooling Capacity and Core Design
Cooling capacity determines how effectively a radiator transfers engine heat to the air. A larger or more efficient core with more fins per inch increases heat dissipation, which matters if you tow, drive in hot climates, or push the engine hard.
Core thickness and tube count affect both cooling and airflow resistance. Thicker cores often cool better but may require more airflow or impact fan performance, so match core design to your driving conditions and the vehicle’s stock fan setup.
Material and Build Quality
Radiators are commonly made from aluminum, copper-brass, or a mix of materials, and construction quality affects durability and heat transfer. Corrosion-resistant materials and robust welds or brazing help prevent leaks and extend service life under road salt, moisture, and vibration.
Look for solid tanks, reinforced mounting points, and quality seals. Better materials and assembly reduce the likelihood of premature failure and can lower long-term maintenance needs.
Fitment and Hose Placement
Accurate fitment to the Infiniti Q50 is crucial to avoid installation headaches. Inlet and outlet locations, mounting brackets, and transmission cooler ports must align with the vehicle’s hoses and mounts to ensure a proper, leak-free installation.
Incorrect hose placement can necessitate adapter hoses or modifications, adding complexity and potential failure points. Confirm the radiator’s exact fitment details against your car’s model year and engine variant.
Compatibility with Transmission Cooling
Many radiators incorporate transmission cooler passages or ports. If your Infiniti Q50 has an automatic transmission, verify whether the radiator includes compatible transmission cooler connections and the correct port locations.
A radiator without integrated transmission cooling will require a separate cooler, while one with ports must match the line fittings. Proper transmission cooling integration helps maintain transmission temperature under load.
Ease of Installation and Maintenance
Installation complexity influences how much time and labor are required. Radiators that reuse factory mounting points, have predrilled brackets, and match hose fittings simplify installation and reduce the chance of leaks.
Maintenance access for coolant drains, petcock valves, and ease of flushing also matters. Consider whether the design allows straightforward radiator coolant flush procedures and replacement without extensive disassembly.
Warranty and Support
Warranty terms and manufacturer support provide protection against early failures. A clear, reasonable warranty indicates confidence in materials and construction and can reduce ownership risk.
Also consider the availability of replacement parts or support documentation. Good customer service and accessible technical guidance can help resolve fitment or installation questions quickly.
FAQ
How do I know if my Infiniti Q50 radiator is failing?
Common signs include recurring overheating, visible coolant leaks, discolored or low coolant level, and steam from the engine bay. You may also notice reduced heater performance in cold weather. These symptoms often indicate coolant loss or restricted flow, but they can also stem from other cooling system components. Inspect hoses, clamps, and coolant level first and consider professional diagnosis if symptoms persist.
Can I replace the radiator myself on an Infiniti Q50?
Many owners can perform a radiator replacement with moderate mechanical skills and basic tools. Tasks include draining coolant, disconnecting hoses and lines, removing mounting hardware, and refilling and bleeding the cooling system. However, automatic transmission lines, tight engine bay clearance, or complex fan assemblies can complicate the job. If you are unsure, seeking professional installation helps avoid leaks and cooling issues.
Should I choose OEM or aftermarket radiators for an Infiniti Q50?
OEM radiators match factory specifications and fitment, which can simplify installation. Aftermarket options may offer different core designs or materials that prioritize performance or cost. Evaluate build quality, documented fitment for your model year and engine, and warranty coverage when deciding between OEM and aftermarket alternatives.
How often should I flush the radiator coolant?
Coolant flush intervals depend on the coolant type and vehicle maintenance history but often range from every 2 to 5 years. Flushing removes contaminants that reduce cooling efficiency and can help prevent corrosion. Follow the coolant manufacturer and vehicle maintenance recommendations, and inspect coolant condition periodically for discoloration or debris.
Will a radiator fix stop overheating immediately?
Replacing a faulty radiator often resolves overheating caused by leaks or inadequate heat transfer, but not all overheating has the same root cause. Issues like thermostat failures, water pump problems, blocked passages, or air pockets can also cause high temperatures. A full cooling system inspection helps identify all contributing factors so the radiator replacement produces the expected improvement.
How We Chose the Best Infiniti Q50 Radiator
Our selection focused on radiators that fit the Infiniti Q50 and deliver reliable thermal management under typical driving conditions. We prioritized material and construction quality, core design and cooling capacity, inlet/outlet placement and hose compatibility, and ease of installation including mounting points. Durability factors such as resistance to corrosion and vibration were considered, along with warranty coverage and manufacturer support. We excluded units that lack clear compatibility documentation or that require significant modifications to fit the vehicle. We also filtered out radiators with unverified performance claims or poor customer support histories. The final list balances real-world fitment, measured cooling characteristics, and long-term durability to reflect what matters most for Infiniti Q50 owners.
Our full evaluation process is outlined in our review methodology.
Conclusion
When choosing an Infiniti Q50 radiator, prioritize a unit that matches the vehicle’s fitment and provides adequate cooling capacity for your driving conditions. Material quality, proper hose and transmission port alignment, and ease of installation are practical factors that influence long-term reliability. Balance cooling performance against installation complexity and warranty coverage. Addressing related cooling system components at the time of replacement reduces the chance of repeat problems and helps ensure stable engine temperatures.
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