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If your Scion xD has seen heavy city driving, towing, or spirited runs, the steering system can run hotter than intended. Choosing the right Scion xD power steering cooler helps lower fluid temperature, reduce wear, and preserve steering performance under stress. This guide covers our seven shortlisted options that fit the Scion xD and explains the key criteria we used to evaluate them, such as cooling capacity and installation compatibility. Read on for the attributes to prioritize before you pick a cooler for your Scion xD.
Looking for other parts? See all Scion xD parts & accessories.
Top Picks at a Glance
| Best Reviewed A top-rated pick with lots of positive feedback | A-Premium Power Steering Oil Cooler (compatible 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 918-322 Power Steering Cooler |  |
| Best Budget The cheapest option that still gets the job done reliably | PartsFlow Power Steering Oil Cooler 918-300 |  |
| Most Sold A high-volume bestseller chosen again and again | Derale 13200 Power Steering Cooler Kit |  |
| Best Value for Money The sweet spot between price and what you get | Aumzong Power Steering Cooler (Replacement 15009093) |  |
| Best Overall The best all-around choice for most situations | Dorman Power Steering Cooler 918-304 |  |
1. A-Premium Power Steering Oil Cooler (compatible models)
| Material | Aluminum |
|---|---|
| Manufacturer Part Number | APOC133 |
| OEM Part Number | 918300, SKTOC049, 15009093, 918-300 |
| Vehicle Fitment Summary | Select Buick, Chevrolet, GMC, Isuzu, Oldsmobile, Saab models listed in description |
| Guarantee | One-year unlimited-mileage |
This power steering oil cooler is a simple, direct-replacement aluminum unit intended to replace a failed cooler and stop power steering fluid leaks. It installs like a factory replacement when the mounting and hose connections match, and users report straightforward DIY fitment and minimal modification. The aluminum construction helps with heat dissipation and resists corrosion compared with older steel units, and the part ships with protective caps over the lines to prevent spills during installation. The product lists multiple reference numbers for cross-checking fitment and the seller offers a one-year unlimited-mileage guarantee. Important limitations are that the listing targets GM platforms rather than Scion vehicles, so fitment must be verified for any different model, and the part does not include gaskets or seals which some installations require. Shipping origin and delivery times have varied in reviews, so plan for potential delays if timing is critical.
Best for: Reliability-focused DIY buyers who prioritize a straightforward replacement part that restores steering system integrity and prefers a durable, corrosion-resistant cooler over cosmetic upgrades.
Less Ideal for: Buyers needing a complete gasket/seal kit or a part guaranteed for Scion xD without additional verification should look for a cooler explicitly listed for that model or a kit that includes seals.
- Aluminum construction improves heat dissipation and resists corrosion compared with steel.
- Multiple OEM reference numbers included for cross-referencing compatibility.
- Many buyers report direct fit and easy DIY installation with minimal adjustments.
- Ships with caps on line ends to limit fluid loss during replacement.
- Does not include gaskets or seals that may be needed for a complete installation.
- Product fitment targets GM platforms in the description rather than Scion xD, so compatibility with other vehicles is not guaranteed.
Verdict A durable, aluminum direct-replacement cooler suited to reliability-minded DIYers, but confirm fitment and source seals separately before installation.
2. Dynamic Power Steering 45258 Power Steering Cooler
| Compatible with | '99-'07 Chevrolet Silverado, GMC Yukon; 1500, 2500, HD |
|---|
This Dynamic Power Steering 45258 cooler is a direct-fit replacement that reduces high temperatures in the power steering system to protect the pump, hoses, fluid, and seals. It is constructed from brazed steel fins and plumbing to resist corrosion and everyday road exposure, and arrives as a complete cooler assembly ready for installation. Typical use is a simple swap where the original cooler has failed or you want to add temperature control to prevent overheating under heavy steering loads. The cooler is manufactured in North America and built to original factory specifications, which helps ensure fit and function. Practical benefits include longer component life and fewer heat-related steering failures, plus the unit's sturdier construction compared with thin, aftermarket alternatives. Limitations are that this part is vehicle-specific and requires correct hose routing and secure fittings for best performance, and installation may need basic tools or a mechanic if line access is difficult.
Best for: Buyers who value convenience and want a straightforward, factory-quality replacement that minimizes repeat visits and restores steering system reliability with minimal fuss.
Less Ideal for: Owners seeking a universal cooler or a custom performance upgrade should consider options designed for adjustable flow or different mounting layouts instead.
- Manufactured to original factory specifications for reliable fit and function.
- Brazed steel fins and coated construction resist corrosion and improve durability.
- Built as a complete, new assembly so no remanufactured parts or prior use.
- Helps lower system temperatures to extend life of pump, hoses, fluid, and seals.
- Vehicle-specific fitment means it will only work where compatible without modification.
- Installation can be awkward if access to power steering lines is limited and may require trimming or routing of lines.
Verdict A durable, factory-spec replacement cooler that simplifies repairing or protecting the steering system for vehicles it fits, but it must match your vehicle's fitment to work.
3. Dorman 918-322 Power Steering Cooler
| Manufacturer Part Number | 918-322 |
|---|---|
| OEM Part Number | 15186858 |
| Exterior | Machined |
| Model | 918-322 |
This Dorman power steering cooler is a direct-replacement heat exchanger intended to cool power steering fluid and restore system performance after a failed or leaking cooler. It is typically used as a drop-in replacement where the original cooler has corroded or been damaged; installation involves removing the old cooler, transferring or replacing hose fittings, and securing the new unit in the factory location. The cooler is machined and built from corrosion-resistant materials to provide reliable heat rejection and long service life. Reviewers report it fits and functions like the factory part and that it resists leaks when installed correctly. Expect the usual installation challenges for underbody coolers on older vehicles where rusted clamps or hard-to-reach mounting points can increase labor time. This part is manufactured as a vehicle-specific replacement, so confirm fitment before buying and be prepared to replace worn clamps or lines during installation.
Best for: Performance-oriented buyers who prioritize reliable, factory-quality cooling for a power steering system and expect a durable replacement they can install or have installed to restore steering feel.
Less Ideal for: Buyers seeking a cooler specifically for the Scion xD should avoid this part unless fitment is confirmed; those wanting a universal or adjustable cooler for custom installations should look elsewhere.
- Direct-replacement design matches factory fit and function on specified vehicles
- Machined, corrosion-resistant construction for durability
- Reportedly leak-free when installed properly
- Common aftermarket choice with positive user feedback on fit
- Not listed for Scion xD so fitment to that model is not verified
- Installation can be difficult on vehicles with rusted lines or tight underbody access
Verdict A durable, factory-style power steering cooler for vehicles it fits, but do not assume compatibility with the Scion xD without verification.
4. PartsFlow Power Steering Oil Cooler 918-300
| Manufacturer | PartsFlow |
|---|---|
| Material | Aluminum |
| Manufacturer Part Number | IAB-AZA |
This PartsFlow power steering oil cooler is an aftermarket replacement intended to perform the same job as the factory cooler: lower and stabilize power steering fluid temperature to reduce wear and prevent leaks. Installation is typical for a steering cooler — mount in the engine bay where airflow is available and reconnect the power steering lines using the existing fittings. The unit is aluminum, which resists corrosion better than older steel designs and helps dissipate heat efficiently. Buyers will appreciate that the cooler ships as a single ready-to-install part with bolt patterns that reviewers report line up well on compatible vehicles. On the downside this is a direct replacement style part rather than an upgraded high-capacity cooler, so it may not offer large extra cooling margin for heavy-duty towing or track use. Packaging reports vary, so check the part for damage before installation. For drivers seeking a low-cost, factory-style replacement that reduces fluid temperatures and extends steering component life, this cooler is a practical option.
Best for: Budget-conscious owners who prioritize a low-cost, factory-style replacement to restore or maintain normal steering performance on an older vehicle.
Less Ideal for: Drivers looking for a heavy-duty or performance upgrade to lower fluid temps under severe towing, racing, or repeated high-load use should consider higher-capacity aftermarket coolers instead.
- Aluminum construction improves corrosion resistance compared with older steel coolers
- Designed as a direct replacement with mounting points that align for straightforward swap-in
- Helps regulate power steering fluid temperature to reduce component wear
- Compact, single-piece cooler that installs without modifying existing lines
- Not a high-capacity performance cooler so it offers limited extra cooling for extreme or heavy-duty use
- Boxing has been reported damaged on arrival in some cases which requires inspection before fitment
Verdict A cost-effective, aluminum direct-replacement steering cooler that restores cooling function without upgrading to a high-capacity unit.
5. Derale 13200 Power Steering Cooler Kit
| Special Feature | Expanded Copper Tubing and Aluminum Cooling Fins, Hardware Kit Included |
|---|---|
| Hose Barb Size | 11/32 inch inlets |
| Model | 13200 |
| Item Weight | 1.5 Pounds |
The Derale 13200 is a small, bolt-on power steering cooler kit designed to lower steering-fluid temperature and extend pump and seal life. It mounts behind the grille or on the radiator support and uses 1/2 inch copper tubing expanded into aluminum cooling fins to dissipate heat; the package includes basic mounting hardware and about four feet of hose. In practice this cooler is useful during towing, spirited driving, or stop-and-go traffic where steering systems run hot. Installers report the kit is light and easy to place, but the supplied hose and clamps are borderline — many buyers replace or add hose and stronger clamps for a more secure, leak-free connection. The unit is compact enough to fit behind the Scion xD grille area without obstructing other components, but routing may require extra hose depending on mounting location. If you want a straightforward, proven add-on to lower steering temperatures on a Scion xD, this kit does the job with modest installation effort but plan to upgrade the hose and clamps for long-term durability.
Best for: A risk-averse mainstream buyer looking to protect factory steering components on a Scion xD by reducing fluid temperatures without major modifications.
Less Ideal for: Drivers seeking a heavy-duty cooling solution for extreme towing or sustained motorsport use should consider larger, dedicated coolers with professional-grade fittings and longer hoses.
- Compact, fits easily behind grille or on radiator support
- Expanded copper tubing with aluminum fins provides effective passive cooling
- Includes basic mounting hardware for a straightforward install
- Lightweight design minimizes added load on mounting points
- Supplied hose and clamps are undersized and may need replacement for reliable, long-term use
- Only about four feet of hose included which can be short depending on preferred mounting location
Verdict A compact, easy-to-install cooler that reliably lowers steering fluid temps on a Scion xD but plan to upgrade the included hose and clamps for best long-term performance.
6. Aumzong Power Steering Cooler (Replacement 15009093)
| Replacement part number | 15009093 |
|---|---|
| Compatible with | Select GM models (listed as equivalents) |
This power steering cooler is a direct-replacement aftermarket unit meant to lower and stabilize power steering fluid temperature to help prevent leaks and extend steering component life. It installs in-line with the vehicle's power steering hoses and is typically used when the original cooler is damaged, leaking, or insufficient for heavier duty use. The listing cites compatibility with a range of GM platforms and the part number equivalent to 15009093, and the unit is reported by buyers to fit and install without major modification. Customers note the cooler is inspected before shipment and built from materials intended for durability. Practical benefits include reduced fluid overheating and a more reliable steering system at price points well below dealer parts. Limitations to consider are minor fitment differences to factory coolers on some units that may require new hose clamps or small adjustments, and a few reports describe assembly quality that could need reinforcement for long-term use.
Best for: Practical optimizers seeking the best value replacement who prioritize reliable function and lower cost over buying from a dealer or OE-priced part.
Less Ideal for: Buyers who want guaranteed factory-identical fit and finish with no possibility of adjustment should consider sourcing a factory-quality cooler directly from the vehicle maker or authorized parts suppliers.
- Reported to fit as a direct replacement on many compatible GM models, enabling straightforward installation
- Lower-cost alternative to dealer parts while claiming factory-standard inspection before shipment
- Built to reduce power steering fluid temperature, which can prevent leaks and prolong steering component life
- Some units have slightly different hose end diameters than factory which may require new clamps or minor hose adjustments
- A small number of reviewers noted assembly or fitment that felt less robust than factory parts and may benefit from reinforcement
Verdict A cost-conscious, practical replacement that delivers near-factory cooling performance for compatible vehicles but may need minor hose or clamp adjustments for perfect fit.
7. Dorman Power Steering Cooler 918-304
| Material | Aluminum |
|---|---|
| Upper Temperature Rating | 120 Degrees Celsius |
| Specific Uses For Product | Power Steering Cooling, Vehicle Maintenance |
| Manufacturer | Dorman Products |
This Dorman power steering cooler replaces a failed factory cooler and restores the power steering fluid cooling circuit to factory-style operation. It is typically used when a leaking or corroded cooler reduces steering performance or causes fluid loss; installation follows standard under-hood/bumper removal procedures to access the cooler lines. The unit is made from corrosion-resistant aluminum and machined exterior components, which helps longevity in road salt or moist environments, and the design aims to match original mounting and hose locations to simplify swap-in replacement. Several owners report only minor tube adjustment during fitment, while others installed it with no issues. The cooler does not include hoses or clamps, so you'll need to reuse or replace those separately, and like any aftermarket replacement some samples may require slight trimming or alignment for a perfect fit. For a Scion xD needing a reliable, factory-style replacement cooler, this part offers a practical, durable option with the occasional need for minor installation trimming.
Best for: A balanced, practical buyer who wants a factory-style, long-lasting replacement that restores steering system reliability without choosing an expensive OEM part.
Less Ideal for: Drivers seeking a complete plug-and-play kit with hoses and hardware included or those who prefer an exact OEM-branded part from the dealership should look elsewhere.
- Direct-replacement design intended to match factory fit and function
- Corrosion-resistant aluminum construction for durability
- Machined exterior finish indicating solid build quality
- Backed by Dorman engineering and aftermarket support
- Hoses, clamps, and seals are not included and must be sourced separately
- May require minor trimming or tube adjustment for an exact fit on some vehicles
Verdict A durable, factory-style aftermarket cooler that restores steering fluid cooling for a practical, cost-conscious repair choice.
Choosing the Right Scion xD Power Steering Cooler: Key Factors to Consider
Fitment and Compatibility
A cooler that does not match the Scion xD mounting points or hose fittings creates installation headaches and potential leaks. Confirming bolt patterns, hose diameter, and connector types reduces the need for adapters or custom brackets.
Proper fitment also keeps the cooler in the ideal airflow zone, which is critical for effective heat rejection. A part that requires relocating other components can add labor and increase the risk of interference with existing systems.
Cooling Capacity and Surface Area
Cooling capacity is typically tied to the cooler's surface area, fin density, and internal fluid path. A larger internal volume and more fin area usually allow the system to shed heat more effectively under sustained loads.
Understanding rated temperature drop or flow-through characteristics helps you choose a unit that will meaningfully lower steering fluid temperatures during stop-and-go traffic or towing. Balance capacity with available space to avoid fitment compromises.
Materials and Corrosion Resistance
Materials such as aluminum cores with protective coatings and stainless-steel fittings resist corrosion and prolong service life in road environments. Marine-grade or anodized finishes help prevent pitting from salt, grime, and moisture exposure.
Durable materials also withstand thermal cycling from repeated heating and cooling events. Inferior materials can fail at fittings or corrode the core, which risks contamination of the steering system and costly repairs.
Included Hardware and Hose Compatibility
Kits that include properly sized hoses, clamps, and mounting brackets reduce installation time and lower the risk of mismatched connectors. Confirm hose inner diameter and length to ensure a leak-free connection without undue tension or sharp bends.
Having the correct fittings means fewer trips to source parts and a cleaner install. If a kit omits hardware, factor in the time and cost to obtain compatible hoses and clamps designed for hydraulic fluid.
Installation Complexity and Serviceability
Some coolers mount to existing brackets or bolt directly to the chassis, while others require drilling or custom bracket fabrication. Assess how much disassembly is needed and whether the job can be completed with basic hand tools.
Easy-to-access mounting locations and straightforward hose routings make future service or inspection simpler. Also consider whether the design allows for quick replacement of hoses or the core in case of damage.
Pressure Rating and Flow Characteristics
Power steering systems operate under pressure, so the cooler and its fittings need an appropriate pressure rating to avoid bulging, leaking, or failure. Look for components rated for typical hydraulic system pressures or higher.
Flow characteristics matter because excessive restriction can increase system pressure and affect steering feel. A well-designed cooler balances adequate heat exchange with minimal flow resistance to maintain consistent steering response.
FAQ
How do I know if my Scion xD needs a power steering cooler?
If you experience overheating symptoms such as repeated steering fluid degradation, soft or inconsistent steering feel during extended drives, or unusually hot hoses near the reservoir, your system may benefit from added cooling. Vehicles used for heavy city driving, track days, or towing are more likely to run the steering system hot. A temperature-focused inspection can confirm whether fluid temps exceed recommended thresholds.
Can I install a power steering cooler on my own?
Many coolers are designed for do-it-yourself installation and come with hoses and mounting hardware, but complexity varies. If the kit matches the Scion xD fittings and includes clear instructions, a competent DIYer can complete the job with basic tools. If the installation requires welding, custom brackets, or internal system work, professional installation is safer and ensures proper leak-free connections.
Will a cooler change steering feel or performance?
A properly sized cooler should reduce fluid temperature without noticeably altering steering feel. However, adding any inline component can introduce some additional flow resistance if the cooler is overly restrictive. Choosing a unit with appropriate flow characteristics and pressure ratings helps maintain consistent steering response while lowering operating temperatures.
How often should I inspect or service the cooler?
Inspect the cooler and its connections at regular maintenance intervals or after any event that could cause damage, such as impact with road debris. Check for leaks, corrosion, and secure mounting. Hoses and clamps should also be examined and replaced if signs of wear or hardening appear. Routine visual checks help catch issues before they affect the steering system.
Will a cooler prevent all power steering problems?
A cooler reduces operating temperature and can extend component life, but it does not address mechanical wear, internal seal failures, or contamination. It is a preventive measure that helps mitigate heat-related degradation. Regular fluid maintenance and addressing leaks or worn components remain essential for long-term steering reliability.
How We Chose the Best Scion xD Power Steering Cooler
We focused on parts and kits that are explicitly compatible with the Scion xD and that address elevated steering fluid temperatures in real-world driving. Primary selection criteria included verified vehicle fitment, rated cooling capacity or surface area to estimate heat rejection, and quality of materials such as corrosion-resistant fins and durable fittings. We also weighed installation complexity and whether the product includes the hoses, clamps, and mounting hardware typically needed for a straightforward install. We excluded universal or poorly documented units without clear fitment guidance and any items that rely on fragile or non-durable materials. Units that required extensive fabrication or custom brackets were deprioritized. The final list emphasizes reliable construction, straightforward installability on the Scion xD, and measurable thermal performance indicators that matter to steering system longevity and consistent steering feel.
Our full evaluation process is outlined in our review methodology.
Conclusion
When selecting a power steering cooler for a Scion xD, prioritize fitment and cooling capacity to ensure effective temperature control without creating installation complications. Durable materials, included hardware, and a design that balances heat rejection with minimal flow restriction are the most important practical considerations. Weigh the tradeoffs between larger cooling cores and available mounting space, and plan for proper hose routing and periodic inspections. Taken together, these factors will help you choose a cooler that reduces overheating risk and supports consistent steering performance over time.
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