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If you drive a Mitsubishi Eclipse hard, tow, or use the car in hot conditions, high steering fluid temperatures can cause reduced steering feel and accelerated wear. Choosing the right power steering cooler helps keep fluid temperatures down, protects seals and pumps, and maintains consistent steering performance over longer drives. This guide covers seven shortlisted power steering coolers selected for the Mitsubishi Eclipse and explains the evaluation criteria we used, so you can pick the option that best matches your installation access, cooling needs, and intended use.
Looking for other parts? See all Mitsubishi Eclipse parts & accessories.
Top Picks at a Glance
| Best Reviewed A top-rated pick with lots of positive feedback | Aumzong Power Steering Cooler (15009093) Compatible with Chevrolet Trailblazer and Select GM Models |  |
| Most Popular A crowd favorite that many people choose with confidence | Dynamic Power Steering 45258 Power Steering Cooler |  |
| Best Quality Built to a higher standard if you want something more solid | Dorman Power Steering Cooler 918-300 |  |
| Best Budget The cheapest option that still gets the job done reliably | Derale 13200 Power Steering Cooler Kit |  |
| Most Sold A high-volume bestseller chosen again and again | Edelmann Elite 58040 Power Steering Cooler |  |
| Best Value for Money The sweet spot between price and what you get | PartsFlow Power Steering Oil Cooler (compatible) |  |
| Best Overall The best all-around choice for most situations | Dorman Power Steering Cooler 918-301 |  |
1. Aumzong Power Steering Cooler (15009093) Compatible with Chevrolet Trailblazer and Select GM Models
| Manufacturer Part Number | 15009093 |
|---|---|
| Replacement Part Numbers | 918-300, SKTOC049 |
| Compatible Models | Select Chevrolet, Buick, GMC, Isuzu and Oldsmobile SUVs/trucks (see fitment) |
This Aumzong power steering cooler is a direct-replacement cooler intended to restore cooling for power steering systems on compatible GM models. It installs in place of the original cooler and is used to reduce fluid temperature under load, which helps prevent foaming and premature wear in the steering pump and hoses. The unit is offered as a factory-style replacement with a claimed 100 percent inspection before shipping and matches common replacement part numbers such as 15009093 and 918-300. Buyers report straightforward installs and correct fitment on supported vehicles, and the cooler’s construction aims for durability. Notable practical limits are that inlet/outlet diameters can differ slightly from factory parts so you may need new clamps or adapters, and a few reviewers noted assembly quality that benefits from reinforcement. For reliability-focused owners this is a cost-effective way to replace a failing cooler, but expect minor fitment checks during installation and keep clamps and basic hose tools on hand.
Best for: A reliability-focused buyer who prioritizes restoring factory steering cooling function without an expensive dealer part and is willing to do a basic DIY install or have a trusted shop fit it.
Less Ideal for: Drivers seeking a plug-and-play, guaranteed identical-fit OEM part with no chance of minor hose adjustments should consider OEM or dealer replacements instead.
- Sold as a direct replacement for common GM part numbers for easier swap-in
- Customers report consistent, correct fitment on supported vehicle applications
- Helps lower steering fluid temperature to reduce pump stress and extend component life
- Lower-cost alternative to dealership parts while claiming factory-style inspection
- Some units have slightly smaller male hose ends than factory which may require new clamps or adapters
- A few reviewers reported assembly quality that may need reinforcement during installation
Verdict Aumzong’s cooler is a practical, reliability-minded replacement that restores cooling function affordably but may need minor hose/clamp adjustments during install.
2. Dynamic Power Steering 45258 Power Steering Cooler
| Manufacturer | Dynamic Power Steering |
|---|---|
| Part Number | 45258 |
| Material | steel |
| Compatible With | '99-'07 Chevrolet Silverado, GMC Yukon; 1500, 2500, HD |
This Dynamic Power Steering 45258 cooler is a simple, direct-replacement cooling assembly intended to reduce high temperatures in a vehicle's power steering system. It installs in place of the factory cooler and is typically used to protect the pump, hoses, seals, and fluid from heat-related wear during towing, heavy use, or hot-weather driving. The cooler is manufactured from steel with brazed fins and a protective coating for corrosion resistance, and the company states it is built to original factory specifications. Practical benefits include extended component life and more consistent steering performance under load because the unit helps dissipate heat the OEM cooler may not handle. Installation is straightforward for a mechanically comfortable DIYer and reviews note good fitment where compatible. Limitations are that this particular part is listed for certain Chevrolet, GMC, and other trucks and SUVs, so fitment to a Mitsubishi Eclipse is not applicable; buyers must confirm correct part number and vehicle compatibility before ordering.
Best for: Convenience-driven buyers who want a ready-made, factory-quality replacement that installs quickly and keeps a used vehicle's steering system running without repeated troubleshooting.
Less Ideal for: Owners looking specifically for a fitment or upgrade for a Mitsubishi Eclipse should avoid this part and seek a cooler made or listed for that model, or consult a professional for a custom solution.
- Built to factory-spec replacement standards for reliable fit where listed
- Steel construction with brazed fins for durability and corrosion resistance
- Helps reduce power steering fluid temperatures to extend pump and hose life
- Made in North America and supplied new rather than remanufactured
- Not listed as compatible with Mitsubishi Eclipse so not suitable for that vehicle without verification
- Single-piece cooler requires proper hose routing and may need hose trimming or adapters for non-listed vehicles
Verdict A durable, factory-style replacement cooler that reliably reduces power steering temperatures for listed Chevy and GMC vehicles but is not compatible with the Mitsubishi Eclipse.
3. Dorman Power Steering Cooler 918-300
| Material | Aluminum |
|---|---|
| Manufacturer Part Number | 918-300 |
| OEM Part Number | SKTOC049; 15009093 |
| Unit Count | 1.0 Count |
| Exterior | Machined |
This Dorman power steering cooler replaces a failed factory cooler with a machined aluminum unit intended to match original fit and performance. It is used inline with the power steering hoses to remove heat from the fluid, which helps maintain steering feel and protect the rack and hoses during towing, spirited driving, or heavy use. Notable features include corrosion-resistant aluminum construction and factory-style mounting points that simplify installation for someone comfortable working under the front bumper. Practical benefits are improved durability over mild-steel coolers and straightforward swap-in installation when access is available. Limitations are that fit and installation can be tight on some vehicles and may require partial removal or flexing of the lower splash panel to access mounting bolts and hose clamps, and longevity depends on routing and exposure to road debris. Also this part lists compatibility with specific models rather than universal fit, so confirm fit before proceeding.
Best for: Performance-oriented owners who prioritize component durability and consistent steering feel under heavy use or spirited driving and prefer a high-quality replacement that mirrors factory fit and function.
Less Ideal for: Buyers seeking a universal cooler or those unwilling to perform moderate under-bumper access and hose work should consider simpler or vehicle-specific alternatives.
- Aluminum construction resists corrosion compared with mild-steel originals
- Designed to match factory mounting points for a direct replacement fit
- Machined exterior and quality control from a known aftermarket supplier
- Reduces power steering fluid temperature to help preserve rack and hose life
- May require partial removal or flexing of lower bumper/splash panel for access during installation
- Not a universal part—must confirm vehicle-year fitment before purchase
Verdict A durable, factory-style aluminum replacement cooler aimed at drivers who need reliable, performance-minded steering fluid cooling but who will verify fitment and accept some installation access work.
4. Derale 13200 Power Steering Cooler Kit
| Inlet/Outlet Barb Size | 11/32 inch |
|---|---|
| Tube Construction | 1/2 inch copper tubing expanded into aluminum fins |
| Hose Included | Approximately 4 feet |
| Model | 13200 |
The Derale 13200 is a simple, budget-friendly power steering cooler kit intended to lower fluid temperature and reduce heat-related pump wear. It mounts forward of the radiator or behind the grille and connects inline with 11/32 inch hose barb fittings using the supplied 4 feet of hose and basic mounting hardware. The cooler uses 1/2 inch copper tubing expanded into aluminum cooling fins for improved heat transfer in a small footprint, so it fits tight locations on compact cars. For a cost-focused install you get everything needed for a basic setup, but several owners report the supplied hose is tight on the barbs and the clamps and mounting rods are modest quality, so sourcing better hose and clamps may be necessary for a reliable, long-term fit. Expect effective temperature reduction for light to moderate street driving, while more demanding track or towing use may need a larger or more heavy-duty unit.
Best for: Budget-conscious Mitsubishi Eclipse owners looking for an affordable way to lower power steering fluid temperature and extend pump life during normal street driving.
Less Ideal for: Drivers who do frequent high-speed track sessions, heavy towing, or intensive off-road use should consider a larger, more heavy-duty cooler designed for sustained high loads.
- Compact design fits tight spaces behind the grille or radiator support
- Expanded copper tubing with aluminum fins for efficient heat transfer
- Includes basic installation hardware and about 4 feet of hose for most short installs
- Lightweight and easy to position during DIY installs
- Supplied hose can be difficult to fit over barbs and may require replacement or extra hose
- Basic clamps and mounting rods are lower quality compared with heavier-duty kits
Verdict A compact, wallet-friendly steering cooler that works well for everyday Mitsubishi Eclipse use but may need upgraded hose and clamps for more demanding conditions.
5. Edelmann Elite 58040 Power Steering Cooler
| Brand | Edelmann |
|---|---|
| Model | 58040 |
| Manufacturer | Plews & Edelmann |
| Exterior | Painted |
The Edelmann Elite 58040 is a bolt-in style power steering cooler engineered to reduce hydraulic fluid temperatures and extend the life of steering pumps, hoses, seals, and fluid. It is used inline with the vehicle power steering circuit to dissipate heat generated during heavy steering loads, which is especially useful for vehicles that see towing, frequent low-speed maneuvering, or extended spirited driving. The unit is built to factory-quality specifications with high-temperature furnace brazing and painted exterior protection for corrosion resistance. Practical benefits include improved fluid longevity and reduced risk of premature pump failure when the steering system is stressed. Limitations are that it is a single dedicated cooler without integrated mounting hardware for every chassis, so some adaptation or specific bracketry may be required for neat fitment on an Eclipse; it does not include hoses or fittings in the listing and will need correct-size lines for installation. This cooler is a straightforward preventive upgrade but not a universal plug-and-play kit for every installation scenario.
Best for: A risk-averse mainstream buyer seeking a preventive, factory-quality steering system upgrade to avoid premature pump and hose failures and reduce maintenance headaches over ownership.
Less Ideal for: Buyers looking for a complete plug-and-play kit with vehicle-specific brackets and hoses or those who prefer a bundled installation solution should consider other options.
- Reduces power steering fluid temperature to help protect pump, hoses, seals, and fluid
- Manufactured to factory-quality specifications with high-temperature brazing for durability
- Painted exterior for added corrosion resistance in under-hood environments
- Compact rectangular design that can be routed into existing power steering lines without large footprint
- Does not include installation hoses, fittings, or vehicle-specific mounting brackets
- May require fabrication or adapter fittings for neat installation on some chassis
- Fitment and compatibility must be confirmed for the Mitsubishi Eclipse before purchase
Verdict A durable, factory-spec power steering cooler for buyers who want a preventive upgrade to lower system temperatures, but plan for separate fittings and mounting for Mitsubishi Eclipse installation.
6. PartsFlow Power Steering Oil Cooler (compatible)
| Material | Aluminum |
|---|---|
| Reference Number | 918-300, 15009093 |
| Package Contents | Power Steering Cooler |
This PartsFlow power steering oil cooler is an aftermarket replacement that cools power steering fluid to help prevent overheating and premature component wear. It installs in-line with the vehicle power steering system and is intended as a direct-replacement cooler where fitment matches. The unit is aluminum for corrosion resistance compared with older steel designs and uses factory-style mounting points so bolts line up during installation. In use it lowers operating temperature of steering fluid, which reduces leaks and extends the life of hoses, seals, and the steering pump. The cooler is a straightforward option for a DIY swap or professional installation, but buyers should confirm exact fitment before purchase since the listing lists specific vehicle applications and reference numbers rather than universal fit. Packaging reports and a few customer notes indicate occasional shipping damage to the box, so inspect the part before installing. A 12-month guarantee is included for added confidence.
Best for: Practical optimizers who want a cost-effective, durable replacement to reduce steering-system overheating and extend service intervals without paying for a premium brand.
Less Ideal for: Buyers seeking a confirmed, vehicle-specific cooler for a Mitsubishi Eclipse with guaranteed fitment should choose a part explicitly listed for that model or consult a parts specialist before buying.
- Aluminum construction resists corrosion better than older steel coolers
- Factory-style mounting points for straightforward bolt-up installation when fitment matches
- Designed to lower steering fluid temperature to reduce wear on pump and hoses
- Includes a 12-month guarantee for basic buyer protection
- Fitment is vehicle-specific so it may not fit Mitsubishi Eclipse without confirmation
- Packaging has been reported damaged on arrival in some cases
Verdict A budget-friendly, aluminum aftermarket cooler that can extend steering component life if you confirm Mitsubishi Eclipse fitment before buying.
7. Dorman Power Steering Cooler 918-301
| Material | Alloy Steel |
|---|---|
| Nominal Inside Diameter | 0.37 Inches |
| Nominal Outside Diameter | 0.65 Inches |
| Manufacturer | Dorman Products |
This Dorman power steering cooler is a direct-replacement heat exchanger intended to restore cooling to a failing or corroded unit. It installs in the factory cooling path to help dissipate heat from the power steering fluid, which reduces fluid breakdown and helps protect the steering pump and transmission. Typical use is a repair or preventive replacement where the original cooler has leaked or rusted through. The unit is machined alloy steel with rubber hose ends and includes hose clamps, so installation is straightforward for a competent DIYer once access to the cooler area is obtained. Customers report reliable fit and improved leak-free performance when the correct application is selected. Limitations include reports of lower-quality supplied hose clamps and occasional premature hose cracking, so plan to replace clamps with higher-quality pinch clamps and inspect hoses before installation. Also confirm vehicle compatibility carefully since fitment is specific to certain platforms and years.
Best for: Balanced all-round buyers who prioritize a reliable, factory-style repair and want a practical replacement that restores steering system cooling without unnecessary upgrades.
Less Ideal for: Shoppers seeking a universal cooler or a performance-upgraded aftermarket cooler for racing or heavy towing should look for purpose-built options instead.
- Direct replacement design intended to match original fit and function
- Machined alloy-steel construction for corrosion resistance compared with cheap stamped units
- Widely reported fit accuracy on supported GM truck and SUV applications
- Simple install for DIY mechanics once front-end access is provided
- Supplied hose clamps are inexpensive and many installers replace them
- Some users reported early deterioration of the rubber hose ends
- Not a universal part so incorrect application selection can lead to fitment issues
Verdict A practical, factory-style replacement cooler that reliably restores power steering cooling if you confirm correct fitment and swap the supplied clamps for higher-quality ones.
Choosing the Right Mitsubishi Eclipse Power Steering Cooler: Key Factors to Consider
Cooling Capacity
Cooling capacity determines how much the device lowers steering fluid temperature during sustained driving or towing. Models with larger surface area, efficient fin patterns, and multi-pass flow will typically absorb and dissipate more heat. Choosing a cooler with adequate capacity matters because insufficient cooling leaves the steering fluid vulnerable to thermal breakdown, which accelerates wear and can reduce assist performance. Match capacity to expected duty cycle; everyday driving needs differ from track or tow use.
Fitment And Mounting
Fitment and mounting address whether the cooler can be securely installed in the Mitsubishi Eclipse engine bay without interfering with other components. Check bracket locations, hose routing options, and available space for a radiator-style assembly or in-line unit. A cooler that fits poorly can lead to vibration, chafing hoses, or difficult service access. Prioritize solutions with vehicle-specific mounting hardware or compact profiles that accommodate the Eclipse’s layout to avoid custom fabrication.
Hose And Connection Compatibility
Hose and connection compatibility affects how easily the cooler integrates with existing power steering lines. Consider hose inner diameter, fitting thread types, and whether adapters or a full kit are provided. Mismatched fittings increase install time and risk of leaks. Choosing a cooler with compatible fittings or a complete hose kit reduces the likelihood of leaks and simplifies installation, especially when space requires precise routing.
Material Durability And Corrosion Resistance
Materials and finish determine how well the cooler resists under-hood heat, moisture, and road salt. Common materials include aluminum cores with protective coatings or stainless steel fittings to reduce corrosion risk. A durable construction extends service life and reduces maintenance. Poorly protected metal can corrode, reducing heat transfer and creating leaks. For long-term reliability, look for corrosion-resistant finishes and robust welds or brazing.
Pressure Drop And Flow Impact
Pressure drop describes how much the cooler restricts hydraulic flow through the steering system. Excessive restriction can reduce assist responsiveness or increase pump load, which may accelerate wear. Select a cooler designed to minimize pressure drop at the steering system’s operating flow rates. Manufacturers that provide flow and pressure specifications make it easier to ensure the unit will not negatively affect steering feel or pump longevity.
Serviceability And Maintenance
Serviceability covers how easy it is to inspect, clean, or replace the cooler and associated hoses over time. Accessibility for periodic checks or winter-season cleaning impacts long-term performance. Easily serviceable units reduce downtime and maintenance costs. Consider placement, availability of replacement parts such as seals or hoses, and whether the cooler design allows flushing of the steering circuit without major disassembly.
FAQ
How do I know if my Mitsubishi Eclipse needs a power steering cooler?
Signs include consistently high steering fluid temperature under load, reduced steering consistency after extended driving, or premature seal and pump wear. If you use the car for spirited driving, towing, or regularly drive in hot climates, a cooler often helps. A visual check for overheating symptoms and consulting maintenance records can clarify whether an upgrade is warranted.
Will adding a cooler change steering feel on the Mitsubishi Eclipse?
A properly sized cooler should not noticeably alter normal steering feel because it is designed to maintain fluid temperature without restricting flow. However, units with excessive internal restriction can increase pump load and affect responsiveness. Choose a solution with low pressure drop and compatible fittings to avoid unintended changes in assist behavior.
Can I install a power steering cooler myself?
Many owners with basic mechanical skills can install an in-line cooler, especially when a kit includes hoses and fittings matched to the Mitsubishi Eclipse. Installation requires routing lines, securing mounting brackets, and bleeding the system to remove air. If space is tight or custom brackets are needed, professional installation may be advisable.
How much maintenance does a steering fluid cooler require?
Maintenance is typically minimal. Periodic visual inspections for leaks, secure fittings, and debris buildup on external fins are usually sufficient. In some cases, the cooler can be flushed if the steering system is serviced, but most units are designed for long-term, low-maintenance operation.
Will a cooler prevent all steering system problems?
A cooler reduces thermal stress on fluid and components but is not a cure-all. It helps prevent overheating-related issues such as accelerated seal wear, but mechanical failures due to age, contamination, or existing damage may still occur. Treat the cooler as one preventive measure among regular maintenance and inspections.
How We Chose the Best Mitsubishi Eclipse Power Steering Cooler
We prioritized items that provide meaningful reductions in steering fluid temperature and that are physically compatible with the Mitsubishi Eclipse engine bay layout. Cooling capacity under sustained load was a primary factor, measured by design features such as fin density, tube diameter, and flow path efficiency. Ease of installation and the availability of vehicle-specific mounting or hose-fitment options were evaluated to ensure most owners can fit the cooler without major modifications. Durability and corrosion resistance were considered, favoring materials and finishes suited to long-term under-hood exposure. Hydraulic flow impact and pressure drop were assessed to avoid options that could impede steering assist operation. We excluded units that lacked clear compatibility information for the Mitsubishi Eclipse or that required significant custom fabrication. We also filtered out products that did not provide technical specifications for cooling performance or materials. The final list focuses on robust, installable solutions that balance cooling effectiveness, installation simplicity, and long-term reliability.
Our full evaluation process is outlined in our review methodology.
Conclusion
When choosing a power steering cooler for a Mitsubishi Eclipse, prioritize cooling capacity that matches your driving demands and a mounting solution that fits the vehicle’s engine bay. Pay attention to hose compatibility and low pressure drop to preserve steering responsiveness. Balance durability and serviceability so the cooler provides consistent performance with minimal maintenance. Focus on the factors above to select a cooler that reduces overheating risk while fitting cleanly into the Eclipse’s existing steering system.
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