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If your Infiniti FX35 runs hotter than you would like or you tow, do spirited driving, or face stop-and-go traffic often, adding a dedicated power steering cooler can reduce fluid temperatures and extend component life. This guide collects the top shortlisted options for the Infiniti FX35 so you can focus on products proven to suit this vehicle and its common duty cycles. We evaluated units across cooling capacity, fitment and mounting options, hose and fitting compatibility, and build quality to help you pick a unit that matches your driving habits. Read on to see the top picks and quick notes on what each type offers.
Looking for other parts? See all Infiniti FX35 parts & accessories.
Top Picks at a Glance
| Best Reviewed A top-rated pick with lots of positive feedback | A-Premium Power Steering Oil Cooler for select GM vehicles |  |
| Most Popular A crowd favorite that many people choose with confidence | PartsFlow Power Steering Oil Cooler 918-300 Compatible with Chevrolet Trailblazer and Similar |  |
| Best Quality Built to a higher standard if you want something more solid | Dorman 918-300 Power Steering Cooler (Replacement) |  |
| Best Budget The cheapest option that still gets the job done reliably | Derale 2-Pass Power Steering Cooler Kit (13213) |  |
| Most Sold A high-volume bestseller chosen again and again | Dynamic Power Steering 45258 Power Steering Cooler |  |
| Best Value for Money The sweet spot between price and what you get | Aumzong Power Steering Cooler (15009093) |  |
| Best Overall The best all-around choice for most situations | Dorman Power Steering Cooler 918-301 |  |
1. A-Premium Power Steering Oil Cooler for select GM vehicles
| Material | Aluminum |
|---|---|
| Manufacturer Part Number | APOC133 |
| OEM Part Number | 918300, SKTOC049, 15009093, 918-300 |
This aluminum power steering oil cooler is a direct-replacement style cooler intended to restore cooling and stop leaks in vehicles that use the same plumbing and mounting as the original unit. It is typically used when a cracked or corroded factory cooler is leaking fluid or when fluid temperatures are running high and steering feel fades. The cooler's aluminum construction offers improved heat transfer compared with older steel designs and the product arrives with protective caps on the ports to keep the system clean during installation. Buyers report straightforward fit and simple installation with minimal modification when the vehicle uses the same connections. Limitations to consider are that fitment is listed for specific GM models and engine combinations, so compatibility with other vehicles must be verified before purchase, and the part does not include gaskets or seals so you will need replacement seals or O-rings during installation. There is also a one-year unlimited-mileage guarantee rather than a longer factory-style warranty.
Best for: Reliability-focused buyers who prioritize restoring proper steering cooling and fixing leaks with a cost-effective replacement part rather than seeking an upgraded performance unit.
Less Ideal for: Drivers looking specifically for a part guaranteed to fit the Infiniti FX35 or seeking a cooler that includes all installation seals and hardware should look for a part explicitly listed for that vehicle and with included gaskets.
- Aluminum construction improves heat dissipation versus older steel coolers
- Common direct-fit design reported to install with minimal modification
- Ships with protective caps on ports to prevent contamination during handling
- Backed by a one-year unlimited-mileage guarantee
- Does not include gaskets or seals needed for a complete installation
- Fitment is specified for certain GM models so compatibility must be confirmed before buying
Verdict A practical aluminum replacement cooler that restores steering fluid cooling and stops leaks when it matches the vehicle's factory connections, but confirm fitment and plan to source seals separately.
2. PartsFlow Power Steering Oil Cooler 918-300 Compatible with Chevrolet Trailblazer and Similar
| Material | Aluminum |
|---|---|
| Manufacturer | PartsFlow |
| Manufacturer Part Number | IAB-AZA |
This PartsFlow power steering oil cooler is a direct-style replacement designed to reduce power steering fluid temperature and help prevent premature component wear. It is typically installed in the vehicle's steering fluid circuit where it exposes hot fluid to airflow for faster cooling. Constructed from aluminum, it resists corrosion better than steel alternatives and is promoted as a bolt-on replacement that lines up with factory mounting points on compatible vehicles. In everyday use it should reduce steering fluid breakdown during towing, long highway drives, and heavy steering loads, which can improve steering feel longevity. Buyers should note this unit is offered as a vehicle-specific replacement and fitment must be confirmed for the Infiniti FX35 before purchase; the listing shows compatibility with a range of GM models rather than Infiniti explicitly. Installation is straightforward for a competent DIYer or shop, but check hose fittings and brackets to avoid extra modifications. The product includes a limited-length guarantee from the brand.
Best for: Convenience-driven buyers who prioritize an easy replacement part that installs quickly and reduces steering-fluid overheating during routine driving and towing.
Less Ideal for: Drivers seeking an off-the-shelf cooler guaranteed to fit the Infiniti FX35 without any verification should look for a part specified explicitly for that model or a specialist adapter solution.
- Aluminum construction reduces risk of rust compared with steel coolers
- Designed to bolt into factory-style mounting locations on compatible vehicles
- Helps lower power steering fluid temperature to protect components under heavy use
- Widely reported by buyers to fit and function as a direct replacement
- Compatibility is listed for specific GM models and does not explicitly include the Infiniti FX35
- May require verifying hose fitting sizes or adapter lines for non-listed vehicles
Verdict A durable, aluminum replacement cooler that lowers steering fluid temperatures but requires fitment confirmation for the Infiniti FX35.
3. Dorman 918-300 Power Steering Cooler (Replacement)
| Material | Aluminum |
|---|---|
| Manufacturer Part Number | 918-300 |
| Exterior | Machined |
| OEM Part Number | SKTOC049; 15009093 |
This Dorman power steering cooler is a direct-fit replacement intended to restore cooling performance after the original cooler fails. It is made from machined aluminum and corrosion-resistant components so it resists rust better than mild-steel originals. Installation follows the same mounting points as the factory unit and is typically used to stop leaks and reduce fluid temperature under load, which helps preserve the steering pump and hoses during spirited driving or towing. Many owners report straightforward bolt-on installs with simple hose clamp work and standard hand tools. Practical benefits include lighter weight than steel coolers, improved corrosion resistance, and engineering aimed at matching OEM fit. Important limitations are that fit must be confirmed for the Infiniti FX35 using the vehicle selection tool since this part lists multiple compatible models, and some buyers may need to adjust mounting alignment during installation. Also this is a replacement cooler only and does not include hoses or clamps.
Best for: Performance-minded owners looking to maintain steering system reliability under higher loads and who prioritize a durable, factory-replacement cooler for spirited driving or occasional towing.
Less Ideal for: Drivers seeking a full upgrade kit with new hoses and clamps or those who prefer a plug-and-play performance cooler with increased capacity over factory specification.
- Aluminum construction improves corrosion resistance compared with mild-steel coolers
- Designed to match factory mounting points for a direct-replacement fit
- Machined exterior and quality components intended for long service life
- Lighter than steel originals which simplifies handling during installation
- Fitment must be verified for the Infiniti FX35 before purchase since the listing covers many vehicles
- Does not include hoses, clamps, or fittings so reuse or separate purchase may be required
Verdict A corrosion-resistant aluminum direct-replacement cooler that restores factory cooling performance for owners focused on maintaining steering system reliability.
4. Derale 2-Pass Power Steering Cooler Kit (13213)
| Model | 2-Pass Power Steering Cooler |
|---|---|
| Inlet barb size | 11/32 inch |
| Tube material | 1/2 inch copper tubing expanded into aluminum fins |
The Derale 2-pass power steering cooler is a small, inexpensive auxiliary cooler intended to lower power steering fluid temperature and help prevent heat-related pump or seal failure. It mounts in a front airflow position and connects inline with existing power steering hoses using 11/32 inch hose barb inlets and common hose sizes; installation typically requires hose adapters or replacement hose ends. Construction pairs 1/2 inch copper tubing expanded into aluminum cooling fins with a painted exterior, making it lightweight and corrosion-resistant in normal use. Because it is a compact 2-pass design it fits into tighter locations behind a grille or in front of an intercooler and provides measurable cooling for street-driven Infiniti FX35s that experience elevated steering temperatures from towing, heavy steering loads, or extended idling. Limitations are its small heat-exchange area compared with larger multi-row coolers and the need to source correct hose sizes and clamps for a clean install. For budget-focused FX35 owners this kit delivers basic, reliable cooling without the cost of a larger dedicated cooler.
Best for: A budget-conscious Infiniti FX35 owner who wants an affordable, easy-to-package solution to reduce power steering fluid heat and extend component life.
Less Ideal for: Drivers who need maximum cooling for heavy towing, motorsport use, or who prefer a larger multi-row cooler for sustained high thermal loads should consider higher-capacity options.
- Compact 2-pass design fits tight front-end locations.
- Copper tubing bonded to aluminum fins for effective basic heat transfer.
- Lightweight and painted exterior resists corrosion in normal conditions.
- Smaller cooling surface than multi-row or larger coolers, so peak cooling is limited.
- Requires correct hose adapters or replacement hoses for proper fitment and sealing.
Verdict A low-cost, compact cooler that gives Infiniti FX35 owners reliable, space-saving temperature control but falls short of larger high-capacity units.
5. Dynamic Power Steering 45258 Power Steering Cooler
| Manufacturer | Dynamic Power Steering |
|---|---|
| Part Number | 45258 |
| Material | steel |
| Warranty Description | Lifetime Warranty |
This Dynamic Power Steering 45258 cooler is a direct-fit replacement designed to lower power steering fluid temperatures and protect the pump, hoses, seals, and fluid from heat-related wear. It installs in place of the original cooler and is typically used when an existing cooler is corroded, leaking, or when extra cooling is desired for towing or heavy use. The unit is manufactured from brazed steel fins and is painted for corrosion resistance, and the vendor states it meets factory specifications. That construction should withstand road exposure and help maintain stable steering performance under load. Important limitations are fitment and vehicle compatibility: this specific part is listed for late-1990s to mid-2000s Chevrolet and GMC trucks, so it will not directly fit an Infiniti FX35 without verifying mounting and hose connections or using custom hoses and brackets. Buyers should expect a straightforward replacement when the part matches the vehicle or plan for additional modification if it does not.
Best for: Risk-averse mainstream buyers who prioritize a factory-quality replacement and long-term reliability over aftermarket upgrades and prefer parts that match factory form and function.
Less Ideal for: Owners seeking a plug-and-play cooler for an Infiniti FX35 without modification or those who need an application-specific kit with hoses and brackets included.
- Constructed from brazed steel fins for durability and corrosion resistance.
- Painted finish and North American manufacture imply consistent build quality.
- Sold as a new assembly not remanufactured to avoid prior-use defects.
- Meets original factory specifications for direct replacement when vehicle fitment matches.
- Intended fitment targets older Chevrolet and GMC trucks so it is not a direct fit for Infiniti FX35.
- No hose adapters or vehicle-specific brackets included for cross-vehicle installations.
Verdict A robust, factory-spec power steering cooler built for durability, but confirm fitment to Infiniti FX35 or plan for modifications before buying.
6. Aumzong Power Steering Cooler (15009093)
| Manufacturer Part Number | 15009093 |
|---|---|
| Replacement Part Numbers | 918-300, SKTOC049 |
| Compatible Models | Selected 2002–2009 GM body-style vehicles (used as reference) |
This Aumzong power steering cooler is a direct-replacement-style aftermarket oil cooler designed to restore cooling function in a vehicle steering system. It is used in place of a failed or leaking cooler to re-establish proper fluid circulation and reduce operating temperatures that can cause steering noise or premature component wear. The part is marketed as inspected before shipping and matches common replacement numbers so installation follows the factory routing and hose connections on compatible vehicles. Real-world benefits include lowering fluid temperatures during towing or spirited driving and stopping driveway leaks from a damaged cooler. Some buyers report the inlet/outlet fittings are slightly different from factory dimensions, so you may need replacement hose clamps or minor hose trimming for a snug fit. Build quality is adequate for budget-focused repairs but some reviews suggest reinforcement or careful inspection before installation for long-term durability. For a practical optimizer this cooler offers a cost-effective way to get a steering system back to working order without paying dealer prices.
Best for: Practical optimizers who prioritize restoring function at a low cost and want a budget-friendly replacement that gets the steering system working reliably again.
Less Ideal for: Buyers seeking a long-term, high-mileage OEM-equivalent solution or those unwilling to make minor hose or clamp adjustments should consider factory-quality replacements instead.
- Direct-replacement design that follows factory routing for straightforward swap-in installation
- Lowers power steering fluid temperature to reduce noise and wear during heavy use
- Cost-effective alternative to dealer parts with many buyers reporting correct fit
- Supplier inspects parts prior to shipment to reduce chances of obvious defects
- Some male fittings reported slightly smaller than factory which can require new clamps or minor hose work
- Aftermarket construction may need additional reinforcement for very high-mileage or heavy-duty use
Verdict Aumzong’s cooler is a budget-friendly, drop-in replacement that restores cooling function but may need minor hose or clamp adjustments for a perfect fit.
7. Dorman Power Steering Cooler 918-301
| Material | Alloy Steel |
|---|---|
| Nominal Inside Diameter | 0.37 Inches |
| Nominal Outside Diameter | 0.65 Inches |
| Exterior | Machined |
This Dorman power steering cooler is a replacement cooling unit intended to restore the power steering system’s cooling capacity when the original cooler has failed or corroded. It installs in the vehicle’s hydraulic circuit to dissipate heat from the power steering fluid and help prevent overheating that can accelerate pump and rack wear. Typical use is as a repair or preventative replacement on older vehicles with an exposed cooler; installers report it fits like the factory part and can be installed with basic hand tools after removing front-end trim for access. Notable features include machined alloy-steel construction and factory-matching inlet/outlet locations for straightforward fitment. Practical benefits are improved durability over a corroded original and reduced risk of power steering fluid overheating. Limitations to note are that the supplied hose clamps and rubber hoses have mixed feedback and some owners replace clamps for a more secure seal, and fit must be confirmed for your vehicle before ordering. Expect a hands-on install that may require partial removal of grille or headlamp assemblies for access.
Best for: Balanced owners looking for a reliable, factory-style replacement to restore power steering cooling and prevent overheating issues on an older vehicle.
Less Ideal for: Drivers seeking a universal or performance-upgrade cooler or those unwilling to perform a moderately involved front-end installation should consider other options or professional installation.
- Direct-replacement design matches original cooler routing for easier installation on compatible vehicles
- Machined alloy-steel construction intended for durability and corrosion resistance
- Reported to fit and perform like the factory unit in many user installations
- Helps reduce power steering fluid temperature to protect pump and steering components
- Some buyers report lower-quality supplied hose clamps and recommend replacing them with better clamps
- A few users noted the rubber hoses can crack prematurely under heavy use
Verdict A dependable, factory-style replacement cooler that restores cooling capacity and fit for older vehicles, though buyers should check fitment and consider upgrading clamps or hoses during installation.
Choosing the Right Infiniti FX35 Power Steering Cooler: Key Factors to Consider
Cooling Capacity
Cooling capacity determines how much heat the cooler can remove from the steering fluid and directly affects operating temperature under load. A higher-capacity cooler will keep fluid temperatures lower during prolonged towing, aggressive driving, or heavy city traffic, which reduces wear on seals and pumps.
When evaluating capacity, consider both the core size and fin density. Larger cores with more surface area and higher fin counts move more heat to ambient air, but they also require adequate airflow. Think about your typical driving conditions to choose a capacity that balances effectiveness and available mounting space.
Fitment And Mounting Options
Fitment matters because the Infiniti FX35 has limited space in common mounting locations. A cooler that offers multiple bracket options or a slim profile increases the odds of a clean installation without interfering with other components.
Check for models that provide adjustable brackets or that can be mounted in-line with existing hoses. Ease of mounting reduces installation time and the need for additional hardware. Proper placement also affects airflow and protection from road debris, so pick a cooler with a suitable shape for your preferred mounting location.
Hose And Fitting Compatibility
Compatibility with existing hoses and fittings reduces the need for adapters and minimizes leak points. Steering systems use specific hose diameters and pressure tolerances, so confirm the cooler accepts the inlet and outlet sizes used on the Infiniti FX35 or comes with appropriate adapters.
Thread type and sealing method matter as well. Look for coolers that include high-quality fittings and crush washers or O-rings rated for hydraulic fluids. If adapters are required, factor in the availability and quality of those parts to maintain system integrity.
Construction And Corrosion Resistance
Materials and construction affect longevity in a road environment that includes salt, moisture, and debris. Coolers built from aluminum cores with corrosion-resistant coatings or stainless steel components tend to last longer and maintain thermal performance.
Weld quality, brazing, and the finish on fittings are all indicators of durability. Choose a cooler with proven corrosion protection and a robust finish to avoid premature leaks or reduced heat transfer due to pitting.
Pressure And Flow Ratings
Power steering systems operate under pressure, so the cooler must withstand the system's maximum pressure and not create a flow restriction that could harm pump performance. Manufacturers that publish maximum working pressure and recommended flow ranges give you confidence the unit will perform safely in the FX35 system.
If a cooler is undersized or rated for low flow, it can cause increased pump load or reduced steering response. Match the cooler's specifications to the vehicle's steering fluid flow and pressure characteristics to avoid unintended issues.
Serviceability And Maintenance
Serviceability covers how easy it is to inspect, clean, or replace the cooler and its hoses. A cooler mounted in an accessible spot with threaded fittings is simpler to maintain and less likely to introduce contaminants during service.
Consider whether replacement hoses or fittings are readily available and whether the kit allows for in-line filter installation if you want added protection. Easy access to the cooler also makes it simpler to check for leaks after installation and to perform periodic cleaning to maintain airflow.
FAQ
Do I need a power steering cooler for casual driving in an Infiniti FX35?
Most casual drivers do not strictly need a cooler, but it can be beneficial if you frequently encounter hot ambient temperatures, heavy traffic, or occasional towing. A cooler reduces peak fluid temperatures, which can extend seal and pump life even in everyday use.
Where is the best place to mount a power steering cooler on an FX35?
The best location balances airflow and protection from debris. Common placements are in front of the radiator or behind the grille where air moves freely. Mounting low in the bumper area can work if there is sufficient clearance and the bracketry protects the cooler from impacts.
Will adding a cooler affect steering feel or pump performance?
A properly sized cooler with the correct fittings should not noticeably change steering feel. Problems can arise if the cooler creates a flow restriction or if incompatible fittings cause leaks. Use units that match the system's hose diameter and pressure rating to avoid adverse effects.
Can I install a power steering cooler myself on the FX35?
Many coolers are designed for DIY installation with basic tools and clear instructions, especially if they include vehicle-specific brackets and adapters. If the kit lacks fittings or requires cutting hoses, you should be comfortable with simple hydraulic work or consult a professional to avoid leaks.
How do I check if a cooler is compatible with my FX35 hoses?
Measure the inner diameter of your existing power steering hoses and inspect the thread type on the fittings. Compare those measurements to the cooler's inlet and outlet specifications or included adapter list. Manufacturers that publish detailed fitment data make compatibility checks straightforward.
How We Chose the Best Infiniti FX35 Power Steering Cooler
We limited our selection to products that explicitly list compatibility with the Infiniti FX35 or that provide the necessary hose and fitting options to adapt to that vehicle without major modification. Key evaluation criteria included measurable cooling capacity or design features that improve heat dissipation, durable construction materials that resist corrosion and pressure, and mounting versatility to fit the FX35 chassis and available locations. We also considered ease of installation, including whether the kit includes fittings and brackets sized for common FX35 plumbing, and long-term serviceability such as replaceable hoses or accessible mounting. Units that required significant custom fabrication, nonstandard fittings, or were clearly intended only for racing use were excluded. Finally, we looked for manufacturers that document pressure ratings and flow direction so buyers understand real-world compatibility and reliability.
Our full evaluation process is outlined in our review methodology.
Conclusion
Choosing the right power steering cooler for an Infiniti FX35 comes down to matching cooling capacity with available mounting space and confirming hose and pressure compatibility. Prioritize units that document flow and pressure ratings and that include appropriate fittings or bracket options to simplify installation. Keep in mind the tradeoffs between larger cores that offer more cooling and the physical space they require. Focus on corrosion-resistant construction and serviceability to ensure the cooler delivers long-term protection against overheating and premature component wear.
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