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If you drive an Infiniti G35 and want to protect the steering system, choosing the right power steering cooler matters. Proper cooling keeps fluid temperatures lower, which reduces wear on seals and the pump and helps prevent sudden steering issues during spirited driving or in high-heat conditions. This guide shortlists the top options for the Infiniti G35 and explains the factors that matter most for fitment and performance. Below you will find our top picks, each selected for its combination of cooling capability, ease of installation, and reliability.
Looking for other parts? See all Infiniti G35 parts & accessories.
Top Picks at a Glance
| Best Overall The best all-around choice for most situations | Mishimoto Universal Transmission/Power Steering Cooler |  |
| Best Quality Built to a higher standard if you want something more solid | Dorman 918-300 Power Steering Cooler |  |
| Best Value The sweet spot between price and what you get | Derale 13200 Power Steering Cooler Kit |  |
| Best Budget The cheapest option that still gets the job done reliably | Hayden Automotive 1011 Power Steering Oil Cooler |  |
| Highest Rated A top-rated pick with lots of positive feedback | Hayden 1009 Power Steering Oil Cooler (9 inch) |  |
| Best Seller A high-volume bestseller chosen again and again | Derale 4-Pass Power Steering Cooler Kit |  |
1. Mishimoto Universal Transmission/Power Steering Cooler
| Material Type | Aluminum |
|---|---|
| Included Components | Cooler, hose, plastic ties, tie connectors, foam pads, O-ring clamps, drain cock connector |
| Nominal Wall Thickness | 0.75 inches |
| Outside Diameter | 0.38 Inches |
The Mishimoto universal cooler is a small, all-aluminum heat exchanger intended to reduce automatic transmission or power steering fluid temperatures when added to a vehicle that needs extra cooling. It mounts to a radiator or other airflow location using the supplied ties and foam pads and connects with the included push-on 3/8" fittings and hoses. In use it provides measurable temperature reduction on street and highway driving, and reviewers report easier long-distance towing and improved shift temperatures after installation. The cooler’s compact 15.5" length and 12" core make it easy to squeeze into tight engine bays like the G35’s, and the aluminum construction resists corrosion while transferring heat efficiently. Hardware is basic and geared to simple installs, so you may need to adapt mounting for a neat, vibration-free fit in some engine layouts, and the kit includes limited hose length and attachment options compared with vehicle-specific coolers. For Infiniti G35 owners seeking a balanced, no-nonsense upgrade to lower steering or transmission temps, this unit offers a practical, durable solution.
Best for: Balanced owners who want a practical, factory-quality upgrade to reduce transmission or power steering fluid temperatures without a vehicle-specific cooler.
Less Ideal for: Drivers who prefer a direct-fit, model-specific cooler with OEM-style fittings and brackets should consider a G35-specific option instead.
- All-aluminum construction for efficient heat transfer and corrosion resistance
- Compact footprint fits into tight engine bays and mounts to a radiator or fan shroud
- Includes push-on 3/8" fittings, hoses, foam pads, and mounting ties for a mostly complete installation
- Lifetime warranty from the manufacturer
- Universal mounting hardware may require custom adaptation for a clean, secure fit
- Supplied hose length and attachment options can be limited for some routing needs
Verdict: A compact, durable universal aluminum cooler that provides effective transmission or power steering fluid cooling in tight engine bays like the Infiniti G35.
2. Dorman 918-300 Power Steering Cooler
| Material | Aluminum |
|---|---|
| Manufacturer | Dorman Products |
| Model | 918-300 |
| Exterior | Machined |
The Dorman 918-300 is a direct replacement power steering cooler designed to match the fit and function of the original cooler on the listed vehicles. It is typically used to replace corroded or failed factory coolers and restore proper power steering fluid cooling and leak-free operation. Constructed from aluminum with a machined exterior and corrosion-resistant components, the cooler offers a durable alternative to mild-steel originals and reduces risk of future rust-related leaks. Installation is straightforward for a competent DIYer or technician and many owners report quick swaps without major disassembly of body panels when following simple removal tips. Practical benefits include improved longevity over steel coolers, factory-style fitment that simplifies installation, and support from an established aftermarket brand. Important limitations are that fitment is vehicle-specific so you must confirm compatibility before buying, and the product listing does not include hoses, clamps, or bleeding instructions beyond general guidance, so expect to have basic consumables and a plan for bleeding the steering system.
Best for: Performance-oriented buyers who prioritize durable, factory-like replacements that restore system reliability and reduce the chance of fluid loss during spirited or heavy use.
Less Ideal for: Buyers who need a universal cooler or a complete kit with hoses and clamps should look for a more comprehensive package or model-specific kit that includes those components.
- Aluminum construction resists corrosion compared with mild-steel originals.
- Designed as a direct replacement to match factory fit and mounting points.
- Machined exterior and quality components aimed at reliable long-term performance.
- Backed by product engineering and widely used in aftermarket repairs, easing parts confidence.
- Compatible only with the specific vehicle list shown so it is not a universal cooler.
- Does not include hoses, clamps, or detailed bleeding tools in the package.
Verdict: A corrosion-resistant, factory-style aluminum replacement cooler for buyers who want a durable, performance-minded upgrade.
3. Derale 13200 Power Steering Cooler Kit
| Special Feature | Expanded Copper Tubing and Aluminum Cooling Fins |
|---|---|
| Inlet Size | 11/32 inch hose barb inlets |
| Model Name | 13200 |
| Installation Type | Self-Adhesive |
The Derale 13200 is a compact power steering cooler kit intended to reduce fluid temperature and help prevent heat-related pump failure. It mounts in front of the radiator or condenser and routes steering fluid through 1/2 inch copper tubing expanded into aluminum cooling fins to shed heat during normal driving and towing. The kit includes hose barb inlets and basic hardware for bolt-on installation, making it a straightforward add-on for routine maintenance or cooling upgrades. In practice it lowers operating temperature during prolonged low-speed or high-load use and can extend pump and seal life when heat is a factor. Because it is a simple inline cooler with a medium core area, cooling is effective for daily driving and light-duty towing but may be modest compared with larger or multi-pass coolers. Installation is practical for a home mechanic but may require careful routing to avoid chafing or kinking of the lines.
Best for: Convenience-driven buyers who want a simple, low-effort upgrade to reduce steering fluid heat and prolong pump life without major modification.
Less Ideal for: Drivers who frequently do heavy towing, competitive driving, or need maximum multi-pass cooling should consider larger or purpose-built heavy-duty coolers instead.
- Compact core with expanded copper tubing and aluminum fins for efficient heat transfer
- Includes hose barb inlets and hardware for a straightforward installation
- Small footprint fits in tight spaces ahead of the radiator or condenser
- Helps lower steering fluid temperature to reduce pump and seal stress
- Cooling capacity is moderate and may be insufficient for heavy towing or extreme-duty use
- Does not include detailed vehicle-specific fitment instructions
Verdict: A compact, easy-to-install power steering cooler that reduces fluid temperature and helps extend pump life for everyday and light-duty use.
4. Hayden Automotive 1011 Power Steering Oil Cooler
| Model | Power Steering Oil Cooler 1011 |
|---|---|
| Recommended hose I.D. | 3/8 inch |
| Exterior | Machined |
| Unit count | 1.0 Count |
| Manufacturer | Hayden Automotive |
The Hayden 1011 power steering oil cooler is an inline cooler intended to reduce operating temperature in power steering systems where heat is a concern, like vehicles with larger tires or frequent low-speed work. It installs in the return hose and comes with mounting hardware for a straightforward bolt-up. By shedding heat it helps protect the pump, hoses, seals and fluid, which can reduce premature failures and maintenance on older or heavily used systems. The unit is machined for durability and sized for systems using 3/8 inch I.D. return hose; Hayden offers similar coolers for different duty levels. Limitations are that fitment depends on hose inner diameter and available mounting space, and it does not include hose or fittings beyond the supplied bracket hardware, so installers should verify hose size and routing before purchase.
Best for: A risk-averse mainstream buyer looking to protect factory steering components on a Scion tC by reducing heat-related wear and extending service intervals.
Less Ideal for: Drivers who need a universal, tool-free retrofit or who cannot accommodate a small inline cooler in their engine bay should consider integrated radiator-mount options or professional installation.
- Reduces power steering fluid temperature to help prolong pump and hose life
- Machined exterior for a durable, serviceable finish
- Includes mounting hardware for simpler installation
- Sized for common 3/8 inch I.D. return hoses used in many aftermarket setups
- Requires matching hose inner diameter and enough underhood space for installation
Verdict: A compact, machined inline cooler that lowers steering fluid temperatures to help extend the life of Scion tC power steering components.
5. Hayden 1009 Power Steering Oil Cooler (9 inch)
| Material | Aluminum |
|---|---|
| Overall Length | 9 Inches |
| Fits Hose I.D. | 3/8 Inch |
| Construction | Tube, Fin |
The Hayden 1009 is a compact aluminum power steering oil cooler intended to lower operating temperature in hydraulic steering systems by increasing fluid surface area and airflow. It mounts inline with 3/8-inch I.D. return hose lines and is commonly used on vehicles that see towing, larger tires, or prolonged low-speed steering work where fluid heat builds up. The unit includes mounting hardware and uses a tube-and-fin, two-row construction to improve heat rejection while remaining lightweight and machined for corrosion resistance. Installation is straightforward for a competent DIYer and the cooler helps reduce wear on pumps, hoses, seals, and fluid by keeping temperatures in check. Limitations include its fixed 9-inch length and 3/8-inch fittings, which restrict fitment to systems that accept that hose size, and it is a single-purpose add-on so it does not address underlying steering component faults.
Best for: Reliability-focused owners who want to reduce steering-system heat and extend the life of pumps, seals, hoses, and fluid without major modifications.
Less Ideal for: Drivers looking for universal fitment or adjustable plumbing options should consider models with multiple inlet sizes or adapter kits instead.
- Aluminum tube-and-fin construction for effective heat dissipation and corrosion resistance
- Includes mounting hardware for straightforward installation
- Designed for 3/8-inch I.D. return hose common on many power steering systems
- Compact 9-inch length fits tight engine bays where larger coolers will not
- Fixed 3/8-inch hose connection limits compatibility with systems using different hose sizes
- No adjustable fittings or adapters included for nonstandard plumbing
Verdict: A compact, aluminum inline cooler that reliably lowers power steering fluid temperature to help preserve system components.
6. Derale 4-Pass Power Steering Cooler Kit
| Model | 4-Pass Power Steering Cooler |
|---|---|
| Manufacturer | Derale |
| Item model number | 13212 |
The Derale 4-Pass Power Steering Cooler Kit is a compact add-on cooler that uses 1/2 inch copper tubing expanded into aluminum fins to lower steering fluid temperature. It installs inline with the power steering hose using 11/32 inch hose barb inlets and is typically mounted where airflow can pass through the fins. In normal driving it reduces heat-related wear on the pump and seals, which can prolong component life during towing, spirited driving, or extended city traffic. The cooler’s 4-pass design increases fluid exposure to the fins for more efficient cooling than single-pass units while remaining lightweight and unobtrusive. Limitations include a basic kit-level fitment that may require custom hose routing or clamps for a clean installation on some vehicles and the need to locate the cooler where it receives adequate airflow to be effective. It is a straightforward, practical upgrade for reducing steering system temperatures without major modifications.
Best for: Balanced, all-round buyers who want a practical reliability upgrade to reduce power steering temperatures and extend component life without heavy modification.
Less Ideal for: Drivers looking for a bolt-in, vehicle-specific plumbing kit with dedicated brackets and fittings or those who cannot provide an airflow location for the cooler.
- 4-pass tubing design increases fluid exposure to cooling fins for better heat dissipation
- Copper tubing expanded into aluminum fins provides good thermal transfer
- Compact, lightweight kit that is easy to tuck into tight engine bays
- Helps extend pump and seal life by reducing fluid temperature during heavy use
- May require custom hose routing or additional fittings for a clean install on some vehicles
- Effectiveness depends on mounting location and available airflow
Verdict: A compact 4-pass cooler that lowers steering fluid temperatures to help extend pump and seal life with minimal space impact.
Choosing the Right Infiniti G35 Power Steering Cooler: Key Factors to Consider
Cooling Capacity
Cooling capacity determines how effectively a cooler lowers power steering fluid temperature under load. Models with larger fin area, more internal fluid passages, or increased surface exposure to airflow usually remove more heat, which helps maintain stable operating temperatures during heavy use.
Higher cooling capacity can reduce thermal stress on seals and the pump, but it may require more space and airflow. Consider driving conditions such as towing, track use, or hot climates, because those scenarios increase thermal demand and make higher capacity more valuable.
Fitment And Mounting
Fitment is crucial for the Infiniti G35 because limited engine-bay space demands precise mounting points and adjustable brackets. A cooler that offers vehicle-specific brackets or an adjustable mounting kit will save installation time and reduce the need for custom fabrication.
Assess available clearance near the radiator and condenser, and ensure hoses can be routed without excessive bending or contact with hot surfaces. Proper mounting reduces vibration and the risk of chafing, both of which affect long-term reliability.
Connection Type And Hose Compatibility
Connection type affects leak resistance and long-term reliability. Look for coolers that use standard pressure-rated hose fittings compatible with Infiniti G35 power steering lines, or that include crush-type fittings or adapters for a secure seal.
Hose material and diameter also matter because they influence flow rate and resistance. Reinforced hoses resist expansion and heat degradation, maintaining consistent fluid flow and pressure during demanding use.
Materials And Corrosion Resistance
Materials influence both durability and heat transfer. Aluminum cores are common because they offer good thermal conduction and are relatively lightweight, while stainless or plated fittings resist corrosion in exposed engine-bay environments.
Protective coatings and quality welding reduce the risk of leaks over time. If you drive in wet or salty conditions, prioritize corrosion-resistant finishes and robust brazing to extend service life.
Installation Complexity
Installation complexity affects whether you can fit the cooler yourself or need professional help. Kits that include vehicle-specific brackets, preformed hoses, and clear instructions shorten install time and reduce error risk.
If a cooler requires custom bracket fabrication or extended hose runs, factor in labor time and the potential need for additional fittings. Simpler installations help maintain factory reliability and lower the chance of post-installation leaks.
Maintenance And Serviceability
Maintenance considerations include accessibility for periodic inspections and ease of replacing hoses or fittings if needed. Coolers with accessible mounting points and standard fittings simplify troubleshooting and repairs.
Also consider whether the design allows for cleaning or flushing without full removal. Serviceable components reduce long-term ownership costs and minimize downtime if a component needs replacement.
How We Chose the Best Infiniti G35 Power Steering Cooler
We focused on attributes that directly affect real-world performance and compatibility with the Infiniti G35. Key evaluation criteria included cooling capacity measured by surface area and airflow design, physical fitment and mounting adaptability to the G35 chassis, hose and connection types for leak-free integration, and construction materials that resist corrosion and vibration.We also weighed installation complexity and the availability of vehicle-specific mounting hardware or kits to reduce installation time. Durability factors such as braid-layered hoses, reinforced fins, and quality fittings were considered to estimate long-term reliability under higher fluid temperatures.Excluded from consideration were units lacking clear fitment information for the Infiniti G35, products with unclear materials or vague connection specs, and any cooler intended solely for generic or non-automotive hydraulic use. The result is a list of solutions that balance cooling performance with practical, G35-specific installability.
Our full evaluation process is outlined in our review methodology.
FAQ
Do I need a power steering cooler for my Infiniti G35?
You might benefit from a cooler if you frequently drive in hot climates, use the vehicle for track or towing, or notice higher-than-normal steering temperatures. A cooler can reduce fluid breakdown and extend component life, but for typical daily driving it is often optional.
How hard is it to install a cooler on an Infiniti G35?
Installation difficulty varies by kit. Vehicle-specific kits with brackets and preformed hoses are usually straightforward for a competent DIYer. More generic units may require fabrication, additional fittings, or professional installation to ensure leak-free routing and secure mounting.
Where is the best location to mount a power steering cooler on an Infiniti G35?
Mounting the cooler where it receives good airflow, typically in front of or near the radiator area, gives the best heat rejection. Ensure there is enough clearance from moving parts and hot surfaces, and route hoses to avoid sharp bends or chafing points.
Will adding a cooler change steering feel?
A properly installed cooler should not noticeably change steering feel. It reduces fluid temperature, which can maintain consistent hydraulic properties. Any change in feel is more likely to result from air trapped in the system after installation rather than the cooler itself.
How do I choose the right hose and fittings?
Select hoses and fittings rated for high-pressure power steering use and compatible with the Infiniti G35 connection sizes. Reinforced hoses that resist heat and expansion perform better under load. If possible, choose kits that include correct-size fittings to avoid mismatches.
Can a cooler prevent power steering overheating completely?
A cooler reduces the risk of overheating by improving heat rejection, but it may not eliminate overheating if there are underlying issues such as a failing pump, restricted flow, or excessive system leaks. Treat a cooler as part of a broader maintenance strategy.
Conclusion
When selecting a power steering cooler for an Infiniti G35, prioritize fitment and cooling capacity to match your driving conditions. Durable materials, correct connections, and a design that receives good airflow will deliver the most reliable temperature control.Weigh installation complexity against the benefits of lower fluid temperatures. For high-stress driving or hot climates, choose a higher-capacity, vehicle-compatible cooler; for occasional use, a simpler, easier-to-install option may be sufficient.
Explore More:
- Check out all Infiniti G35 parts & accessories
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- Explore Cooling System
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