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If your Mitsubishi Outlander sees heavy towing, long highway runs, or frequent steep climbs, a dedicated power steering cooler can reduce fluid temperatures and extend component life. Picking the right cooler matters because overheating accelerates wear on seals, pumps, and hoses and can lead to reduced steering performance when you need it most. This guide covers seven shortlisted Mitsubishi Outlander power steering coolers chosen for their fitment approach and thermal performance. We evaluated cooling capacity and build quality, plus factors such as installation complexity and compatibility with hydraulic steering systems. Read on to see which options matched our editorial filters.
Looking for other parts? See all Mitsubishi Outlander parts & accessories.
Top Picks at a Glance
| Best Overall The best all-around choice for most situations | Derale Series 7000 Power Steering Cooler Kit |  |
| Best Quality Built to a higher standard if you want something more solid | Mishimoto Universal Transmission/Power Steering Cooler |  |
| Best Value The sweet spot between price and what you get | Derale 13309 Power Steering Cooler Kit (Black) |  |
| 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 | Derale 13200 Power Steering Cooler Kit |  |
| Most Popular A crowd favorite that many people choose with confidence | 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. Derale Series 7000 Power Steering Cooler Kit
| Material | Aluminum/Copper |
|---|---|
| Inlet/Outlet | 11/32 in Hose Barb |
| Finish | Black Powder Coat |
| Type | Tube and Fin Core |
The Derale Series 7000 power steering cooler kit is a small tube-and-fin cooler intended to lower steering fluid temperature for improved system longevity and consistent steering feel. It installs inline using 11/32 inch hose barb fittings and includes mounting hardware and hose, so it is typically used between the power steering pump and rack or reservoir to shed heat during towing, spirited driving, or stop-and-go traffic. The aluminum and copper construction with a black powder coat gives corrosion resistance and a tidy under-hood appearance. Its compact core fits in tight spaces behind the bumper or near the radiator while still offering better thermal transfer than an uncooled line. Limitations are its modest core size, which means it is best for everyday performance improvement rather than heavy-duty cooling for large towing loads, and hose barb fittings require secure clamp connections to avoid leaks. Overall it is a straightforward, durable factory-replacement style cooler for owners who want lower steering fluid temps without complex plumbing.
Best for: Balanced all-round buyers who want a reliable, easy-to-install cooler to lower power steering fluid temperatures for improved steering consistency and component life without major modifications.
Less Ideal for: Owners who need heavy-duty cooling for frequent towing, motorsport use, or substantially modified steering systems should choose a larger or purpose-built cooler.
- Aluminum/copper tube-and-fin design provides efficient heat transfer for its size
- Compact core and included hardware allow installation in tight engine bays
- Black powder coat finish offers corrosion resistance and a clean appearance
- Includes hose and fittings for a mostly complete install
- Small core size limits cooling capacity for heavy towing or extreme use
- Uses hose barb fittings that require careful clamping to prevent leaks
Verdict: A compact, durable inline power steering cooler that lowers fluid temperatures with minimal fuss for everyday driving and light towing.
2. Mishimoto Universal Transmission/Power Steering Cooler
| Core length | 12" |
|---|---|
| Fittings | 3/8" push-on |
| Material Type | Aluminum |
| Item Length | 15.5 Inches |
The Mishimoto universal cooler is a small, all-aluminum heat exchanger intended to reduce operating temperatures for automatic transmissions, power steering racks, or engine oil when added to an existing cooling system. It mounts to a radiator or condenser using the supplied tie straps and foam pads and connects with 3/8" push-on fittings for straightforward hose routing. In practice this cooler is useful when swapping to an aftermarket radiator that lacks transmission ports or when extra cooling is needed for heavy towing or spirited driving. The lightweight 12" core and aluminum construction transfer heat efficiently without adding much bulk, and the kit includes basic hardware and a drain cock for easier servicing. Limitations are its universal fit approach which may require creative mounting on some Outlander model years and that the supplied hoses and attaching hardware are minimal compared with vehicle-specific kits, so expect to source additional fittings or clamps for a neat installation on the Outlander.
Best for: Performance-oriented owners who prioritize lower fluid temperatures and longer transmission or steering component life on a Mitsubishi Outlander and are comfortable with minor custom mounting or plumbing work.
Less Ideal for: Buyers seeking a vehicle-specific plug-and-play cooler with exact-fit brackets and complete hose kits should consider model-matched options instead.
- All-aluminum construction for efficient heat transfer and corrosion resistance.
- Compact 12-inch core fits into tight spaces behind radiators or condensers.
- Includes push-on 3/8" fittings and basic mounting hardware for quick installs.
- Mishimoto lifetime warranty provides long-term support.
- Universal mounting hardware can require custom brackets or adjustments for a clean fit on some vehicles.
- Kit may include only minimal hose length and connectors, so additional parts can be necessary.
Verdict: A compact, high-quality aluminum cooler that delivers reliable fluid temperature reduction for performance-minded Outlander owners willing to do light custom installation.
3. Derale 13309 Power Steering Cooler Kit (Black)
| Model | Power Steering Cooler (-6AN) |
|---|---|
| Item model number | 13309 |
| Exterior | Painted |
The Derale 13309 is a small, four-pass power steering cooler kit designed to lower fluid temperatures using 1/2 inch copper tubing expanded into aluminum cooling fins and extruded plastic fin guards. It installs in-line with your power steering or auxiliary cooling circuit to improve heat dissipation under load or in towing and spirited driving. The painted finish and compact footprint make it easy to tuck into tight engine bays like the Scion tC without looking out of place. Practical features include the four-pass design for increased cooling efficiency and protective plastic fin guards to reduce debris damage. Limitations to note are its modest size and capacity compared with larger, heavier-duty coolers, so it is best for everyday drivers seeking better thermal control rather than heavy towing or extreme track use. Installation will require compatible AN fittings and basic plumbing skills or a shop visit.
Best for: Practical optimizers who want an affordable, space-efficient upgrade to lower power steering or auxiliary fluid temperatures in daily-driven Scion tC vehicles without overspending on heavy-duty gear.
Less Ideal for: Drivers who frequently tow heavy loads or push fluid temperatures to extreme limits should choose a larger, higher-capacity cooler designed for heavy-duty duty cycles.
- Four-pass cooler design improves fluid heat exchange compared with single-pass cores
- Copper tubing bonded to aluminum fins for effective thermal transfer
- Compact, painted unit fits tight engine bays common to compact cars
- Extruded plastic fin guards help protect fins from road debris
- Smaller capacity limits effectiveness for heavy towing or extreme performance use
- Requires compatible fittings and basic plumbing skills for installation
Verdict: A compact, budget-friendly four-pass cooler that delivers noticeable temperature control for everyday Scion tC driving without taking up much space.
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. 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.
6. 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.
7. 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 Mitsubishi Outlander Power Steering Cooler: Key Factors to Consider
Cooling Capacity
Cooling capacity is the core function of a power steering cooler. A cooler with greater surface area, denser fin arrangement, or a multi-pass core will reject more heat from the fluid, lowering operating temperature under sustained loads.
Lower fluid temperatures slow seal degradation and reduce the risk of aeration or foaming. When evaluating capacity, consider the typical duty cycle of your Outlander, such as towing or mountainous driving, since heavy use demands a higher-capacity cooler to maintain stable temperatures.
Fitment And Compatibility
Correct fitment ensures the cooler integrates with the Outlander's existing lines without excessive bends or stress on fittings. Look for products that specify compatibility with the vehicle's hydraulic layout or include a kit that matches the factory hose diameters.
Good compatibility reduces installation time and the chance of leaks. If a kit requires adapter fittings or hose splicing, plan for professional installation or confirm that included components match the vehicle to avoid reliability issues.
Material And Construction
Materials influence both thermal performance and durability. Aluminum cores are common because they offer a favorable strength-to-weight ratio and good thermal conductivity, while higher-quality brazing and corrosion-resistant finishes increase service life.
Also consider the robustness of end tanks, fittings, and mounting brackets. Corrosion-prone materials or thin sheet construction can fail under heat and vibration, so prioritize units with solid fabrication and protective coatings for underhood environments.
Mounting Location And Airflow
Where the cooler mounts affects how well it cools. Front-mounted locations with unobstructed airflow provide the best heat rejection, while tucked or low-airflow spots reduce effectiveness.
Consider how the chosen mounting point interacts with other underhood components and whether the bracketry allows for adjustable positioning. Adequate clearance prevents rubbing and ensures airflow is not blocked by splash shields or accessories.
Installation Complexity
Installation complexity affects cost and time. Some kits use simple inline connections and clamp-on mounts, while others require cutting lines, flaring fittings, or relocating components.
If you plan to install the cooler yourself, choose a kit with clear instructions, compatible hoses, and necessary fittings. For more invasive installs, budget time or professional labor to ensure sealed connections and correct routing to avoid cavitation or leaks.
Sealing And Fitting Quality
Sealing integrity at hose ends and fittings is critical to prevent leaks under pressure. Look for kits that include purpose-built fittings, crush washers, or reusable quick-connects designed for power steering fluids.
Poorly sealed connections can introduce air into the hydraulic system, causing noise and reduced steering responsiveness. High-quality fittings also simplify maintenance and reduce the likelihood of corrosion or loosening from vibration.
How We Chose the Best Mitsubishi Outlander Power Steering Cooler
We focused on coolers designed specifically to work with the hydraulic characteristics and routing of the Mitsubishi Outlander. Primary evaluation criteria included cooling capacity, measured by heat rejection or increased flow surface area; material and construction quality, such as aluminum core density and brazing; connection and hose compatibility with stock power steering lines; and mounting options that preserve underhood clearance and airflow. We also assessed ease of installation, including whether the kit required line splicing or used quick-connect fittings, and the durability of fittings and brackets for long-term service. Exclusions included universal units that required extensive custom plumbing or major modifications to the Outlander chassis, products lacking clear compatibility information, and units intended only for light-duty passenger cars with minimal thermal benefit. The result is a curated list focused on fitment, thermal performance, and installation practicality for the Mitsubishi Outlander.
Our full evaluation process is outlined in our review methodology.
FAQ
How do I know if my Mitsubishi Outlander needs a power steering cooler?
If you notice rising steering fluid temperatures during towing, frequent hard steering, or a history of seal failures, your Outlander may benefit from additional cooling. Also check for dark, burnt-smelling fluid or foaming, which can indicate overheating. Routine inspection under heavy-duty use often identifies when an upgrade is warranted.
Can I install a power steering oil cooler myself on an Outlander?
Many owners can handle a straightforward inline cooler installation if the kit matches hose diameters and includes clear instructions. However, installations that require cutting lines, flaring, or routing around tight spaces may call for professional help to ensure leak-free, reliable connections. Factor in tools and experience when deciding.
Will adding a cooler change steering feel or performance?
A properly sized cooler installed with correct routing and fittings usually does not noticeably change steering feel. If hoses are routed with sharp bends or if air is introduced during installation, you may experience noise or reduced responsiveness until the system is bled correctly. Proper installation minimizes impact on system performance.
Where is the best place to mount a cooler on the Outlander?
Mounting in a location with direct airflow, such as ahead of the radiator or near the front bumper support, maximizes heat rejection. Avoid placing the cooler where debris, splash from the road, or obstructed airflow will reduce effectiveness. The ideal mounting spot balances cooling, protection, and simplicity of hose routing.
How do I maintain a power steering cooler after installation?
Inspect hoses and fittings periodically for leaks, corrosion, or loose brackets. Keep the cooler clean of debris and ensure fins are not crushed, as damaged fins reduce airflow and thermal performance. If you detect contamination or burnt fluid, service the entire steering system according to factory recommendations.
Conclusion
When choosing a Mitsubishi Outlander power steering cooler, prioritize cooling capacity, correct fitment, and durable construction. Those three dimensions determine how effectively the unit reduces fluid temperatures and how long it will last in real driving conditions.Balance installation complexity and mounting location against the thermal benefit you need. For heavy-duty or frequent towing use, opt for higher-capacity cores and robust fittings; for lighter duty, a simpler inline cooler with solid seals may be sufficient.
Explore More:
- Check out all Mitsubishi Outlander parts & accessories
- Explore Power Steering Coolers Maintenance & Repair Guides
- Explore Cooling System
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