Note: This article contains affiliate links. If you click on these links and make a purchase, I may earn a small commission at no extra cost to you. This helps support my research and content. Read my full affiliate disclosure here.
Replacing worn oil cooler lines is a practical way to maintain engine cooling and prevent oil loss in a Kia Soul. You want parts that fit cleanly, resist leaks, and hold up to heat and pressure during normal driving and highway use. This guide highlights the top shortlisted options for Kia Soul oil cooler lines, chosen for their fitment reliability and material durability. We evaluated each candidate on durability and leak resistance, plus ease of installation and compatibility with factory fittings. Read on to see which lines meet those standards and what to check before you buy.
Looking for other parts? See all Kia Soul parts & accessories.
Top Picks at a Glance
| Best Reviewed A top-rated pick with lots of positive feedback | DICMIC Engine Oil Cooler Lower Line Assembly with Gaskets |  |
| Best Quality Built to a higher standard if you want something more solid | Dorman Transmission Oil Cooler Line 624-097 (OE FIX) |  |
| Most Sold A high-volume bestseller chosen again and again | A-Premium Transmission Oil Cooler Line Hose Assembly |  |
| Best Value for Money The sweet spot between price and what you get | NOVAPARTS Engine Oil Cooler Line Hose Lower Pipe Assembly with Gaskets |  |
| Best Overall The best all-around choice for most situations | A-Premium Automatic Transmission Oil Cooler Line Hose Assembly |  |
1. DICMIC Engine Oil Cooler Lower Line Assembly with Gaskets
| Manufacturer | DICMIC |
|---|---|
| Manufacturer Part Number | DICMIC-D261 |
| OEM Part Number | 0400429131, 1576731010, 1576731020, 625-022 |
| Position | Lower supply & return |
This lower oil cooler line assembly replaces the factory supply and return lines and comes with two gaskets for installation. It is a metal pipe assembly intended to restore oil flow to the cooler after a cracked or corroded original line; typical use is as a direct replacement when the vehicle develops low oil pressure or visible leaks from the cooler connections. Reviewers report a snug, factory-quality fit and that the all-metal construction can feel more durable than the original rubber/metal combo. The package includes the line and gaskets only, so expect to supply basic hand tools and some gasket maker during installation. Access to the mounting studs is tight on many vehicles, so the job can require extensions, universal joints, and patience. Some units show minor brazing imperfections that may need light dressing before assembly. If installed carefully and torqued to spec, the part performs reliably and stops leaks without further modification.
Best for: A reliability-focused buyer who prioritizes a durable, factory-replacement style fix and plans to keep their vehicle long term while addressing oil-cooling leaks themselves or with a trusted mechanic.
Less Ideal for: Drivers looking for a plug-and-play solution with step-by-step instructions or full installation kits should consider alternatives that include hardware and detailed guidance.
- Direct replacement design for the lower oil cooler line to restore oil flow and stop leaks
- Includes two gaskets so you can complete the repair without sourcing extra sealing parts
- All-metal construction that reviewers say feels sturdier than older rubber/metal assemblies
- No installation instructions included so some mechanical experience is required
- Minor manufacturing blemishes like brazing overrun have been reported and might need light sanding
- Package contains only the line and gaskets, so additional consumables and tools are needed for installation
Verdict A sturdy, all-metal lower oil cooler line that offers a reliable, cost-effective factory-style replacement when you need to stop leaks and restore oil pressure.
2. Dorman Transmission Oil Cooler Line 624-097 (OE FIX)
| Material | Metal, Rubber |
|---|---|
| Maximum Pressure | 100 Pound per Square Inch |
| Position | Center |
| Manufacturer Part Number | 624-097 |
This Dorman transmission oil cooler line is an aftermarket replacement built to match the original routing and function while strengthening the hose-to-metal junction with a crimped connection. It is used in-line between the transmission and radiator to carry transmission fluid to the cooler and back during vehicle operation. The notable feature is the crimped fitting that the manufacturer says is roughly eight times stronger than the factory spring-clamp joint, which reduces the chance of leaks that start from corrosion where rubber meets metal. Construction combines metal tubing and rubber hose sections and includes attachment clips for mounting. In practice this part should deliver longer service life in corrosive environments and provide a straightforward fit when the correct vehicle application is selected, but some buyers report needing minor end modifications or careful alignment at the radiator fitting to prevent leaks. Installation can require radiator fan or partial cooling-system access, so expect some teardown on the Kia Soul to reach the lower lines. This line is a practical upgrade if you want a sturdier replacement than the original, but confirm exact fitment before installation.
Best for: Performance-oriented owners focused on reliable, longer-lasting cooling for the transmission who prioritize stronger repair solutions over lowest cost and want a replacement that reduces leak risk.
Less Ideal for: If you prefer a plug-and-play part with guaranteed drop-in fit without any chance of end adjustments or if you want a completely OEM-sourced line, this aftermarket option may not be the best choice.
- Crimped hose-to-tube connection designed to resist corrosion and reduce leaks compared with spring-clamp joints
- Made to match original fit and function for direct replacement when the correct application is chosen
- Includes necessary mounting clips and quick clips for a tidy installation
- Combines metal tubing with rubber hose for a familiar, serviceable design
- Some users needed to modify the hose ends or carefully center the fittings at the radiator to avoid leaks
- May require partial radiator or fan removal for access, making installation moderately time consuming
Verdict A more durable, corrosion-resistant replacement line that improves durability over the factory-style clamp joint but requires careful fit confirmation and some installation effort.
3. A-Premium Transmission Oil Cooler Line Hose Assembly
| Material | Metal; Rubber |
|---|---|
| Type | Transmission Oil Cooler Hose |
| Location | Inlet (Lower) |
This transmission oil cooler line replaces the lower inlet line that routes transmission fluid to the cooler. It installs as a direct replacement and is intended for use where the original cooler line has corroded, cracked, or begun leaking. The assembly combines metal and rubber sections so you get rigid connections where required and flexible hose where vibration isolation helps prevent stress. Practical benefits include a corrosion-resistant construction for longer life than aged factory lines and a claimed fit to the listed reference numbers for a straightforward swap during routine transmission service or a leak repair. Important limitations are that fitment must be verified for the vehicle before purchase and the mixed-material design still requires careful routing and secure clamps to avoid chafing; this is a single specific line so replacing other cooler hoses may be necessary if they are also worn. Expect a mechanic-level installation rather than a simple quick fix for untrained owners.
Best for: A cautious, risk-averse buyer who prioritizes a like-for-like replacement and wants a reliable component to restore factory cooling performance after a leak or failure.
Less Ideal for: Shoppers looking for a full hose kit covering all cooler lines or a universal repair solution should consider a more comprehensive kit or professional service.
- Direct-replacement design intended to match factory routing for an easy swap
- Combination of metal and rubber sections balances durability with vibration isolation
- Corrosion-resistant materials reduce likelihood of leaks from rusted original lines
- Includes gasket or seal to help ensure a leak-free connection on installation
- Compatibility is given by reference numbers and vehicle fitment must be confirmed before buying
- This product is a single inlet (lower) line only and may not address leaks elsewhere in the cooling circuit
Verdict A practical direct-replacement cooler line built to restore factory-style cooling in vehicles that match the listed reference numbers, but verify fitment and note it replaces only the single lower inlet line.
4. NOVAPARTS Engine Oil Cooler Line Hose Lower Pipe Assembly with Gaskets
| Brand | NOVAPARTS |
|---|---|
| Manufacturer Part Number | USB-625-022 |
| OEM Part Number | 15767-31020, 15785-31010, 11496-31010, 5801326, 625-022 |
| Fits Engines | 3.5L models listed |
| Included | 1 oil cooler line + 2 gaskets |
This NOVAPARTS oil cooler line is a replacement lower pipe assembly supplied with two gaskets for reinstalling the engine oil cooler connection. It is used to replace cracked or leaking rubber lines and restore a sealed oil-cooler circuit; installation requires basic hand tools and some patience to access the mounting flanges. The listing includes OEM cross-reference numbers and multiple user reports of accurate fitment on compatible Toyota and Lexus 3.5L models. Practical benefits are straightforward: a metal pipe resists the common failure mode of soft rubber hoses, the included gaskets simplify the service, and customer feedback shows good sealing when flange faces are cleaned and gasket compound is used. Limitations are that fit can be tight in confined engine bays and a few buyers reported differences from factory parts that made access to a rear bolt difficult, so modest modification or time to maneuver may be needed during installation. This part is a budget-conscious aftermarket option for replacing a failed oil cooler line when an identical factory piece is not available.
Best for: Practical optimizers looking to repair a leaking oil cooler line economically and keep their vehicle on the road without paying dealer labor costs.
Less Ideal for: Buyers seeking a direct OEM-specified part for a different vehicle or those unwilling to work around tight access or make minor adjustments during installation should consider alternatives.
- Metal replacement pipe reduces chance of rubber hose collapse or burst compared with original rubber lines
- Includes two gaskets so you can reinstall the flange connections without sourcing extra parts
- Multiple OEM cross-reference numbers listed to help confirm correct part match
- Well-documented user installations indicating reliable sealing when flange faces are prepared properly
- Some units show slight shape differences from factory part which can obstruct access to bolt heads in tight engine bays
- Installation can require cutting old clamps or working around nearby components, so expect moderate labor time
Verdict A budget-friendly metal replacement that restores a leaking oil cooler line with included gaskets but may need extra fiddling in cramped engine bays.
5. A-Premium Automatic Transmission Oil Cooler Line Hose Assembly
| Manufacturer | PremiumpartsWhosale |
|---|---|
| Brand | A-Premium |
| Manufacturer Part Number | APOCL187 |
| OEM Part Number | 5005204AA, 5005204AC, 5005204AD, 5005204AE, 5005204AF, 5005204AG, 5005205AA, 52014764AA, 624-284 |
| Fits transmission type | 6 Speed Transmission |
This transmission oil cooler line assembly replaces the factory cooling hose that carries transmission fluid between the transmission and the external cooler. It is supplied as a preformed line with fittings and is intended for bolt-in replacement during a transmission or cooling-line repair. In use it offers corrosion-resistant construction and factory-style connectors so installers can reconnect to existing fittings without modifying the system. Buyers will appreciate that it lists multiple reference numbers for cross-checking fitment and that the assembly covers both inlet/outlet or pressure/return configurations depending on vehicle application. Practical benefits include a ready-to-install shape that reduces installation time and lowers the chance of leaks compared with patching damaged factory lines. Limitations are that fitment must be verified carefully before purchase and some customers report non-OEM level finish on caps and small parts, so you may want retaining clips or caps from the original line when reassembling. The part is best for routine repairs where a replacement line is preferred over complex fabrication or costly dealer alternatives.
Best for: A balanced all-round buyer who wants a ready-made, practical replacement line to fix transmission cooling leaks without paying dealer prices and who values straightforward installation and reliable basic performance.
Less Ideal for: Drivers seeking an exact factory-sourced part with guaranteed factory-fit cosmetic finish or those who prefer a repair that includes every small clip and cap in the kit.
- Preformed assembly with factory-style fittings for straightforward installation
- Corrosion-resistant construction aimed at leak-free performance
- Covers both pressure/return and inlet/outlet configurations for listed applications
- Reference part numbers provided for cross-checking vehicle compatibility
- Not described as OEM-quality finish on small caps and fittings
- Requires careful compatibility verification before ordering
- May not include retaining clips or small hardware needed for reassembly
Verdict A practical, ready-to-install replacement cooling line that balances fitment coverage and value but requires checking compatibility and may lack some small OEM-grade hardware.
Choosing the Right Kia Soul Oil Cooler Lines: Key Factors to Consider
Fitment and Compatibility
Correct fitment is critical because oil cooler lines must align precisely with the Kia Soul’s feed and return ports to avoid stress on fittings and premature failure. Lines that match OEM routing reduce the chance of rubbing against adjacent components, which can cause chafing and leaks.
Verify that the replacement lists compatibility by model year or by explicit Kia Soul fitment. Also check whether the kit includes necessary brackets, clips, or adapters to replicate factory routing and secure connections.
Material and Heat Resistance
Materials must withstand hot engine oil, pressure, and repeated thermal cycles without degrading. Look for hoses made from oil-resistant synthetic rubber or PTFE-lined constructions and metal tubing or braided stainless steel sleeves where heat and abrasion are concerns.
Higher-grade materials generally resist hardening, cracking, and swelling, which translates to fewer oil cooler line failures over time and better leak prevention.
Fittings and Connection Quality
Fittings are the junction points most prone to leakage, so their design and manufacturing quality matter. Seek fittings that use proper flares, crimped ferrules, or OEM-style quick-connects compatible with Kia Soul locations to ensure a secure seal.
Also consider whether replacement lines come with replacement washers, O-rings, or new clamps. Fresh sealing hardware reduces the risk of reusing worn parts that could cause seepage after installation.
Durability and Abrasion Protection
Durability includes resistance to physical wear from vibration, contact with other components, and road debris. Protective measures such as braided sleeves, heat shields, or abrasion-resistant outer layers extend service life.
Assess whether the design routes lines away from hot exhaust components and moving parts. Reinforced sections or integrated protective coverings are particularly useful in high-stress areas under the Kia Soul’s hood.
Ease of Installation and Serviceability
Installation difficulty affects total time and the likelihood of a proper job. Kits that provide clear fitment information, labeled lines, and all required hardware reduce installation errors and make it easier for technicians or experienced DIYers.
Also consider access for future service. Lines that allow replacement of individual components or include quick-disconnect fittings can simplify maintenance and reduce labor when a single hose or fitting needs attention.
FAQ
How do I know when my Kia Soul oil cooler lines need replacement?
Common signs include visible oil seepage around fittings or along a hose, a noticeable oil smell in the engine bay, or drops in oil level without other obvious causes. You might also find softening, cracking, or bulging in rubber hoses during a visual inspection. Addressing these symptoms early helps prevent larger leaks and potential engine damage.
Can I replace only one oil cooler line or should I replace both feed and return lines?
You can replace a single failed line if the other is in good condition, but many technicians recommend replacing both feed and return lines if one shows age or wear. Replacing both reduces the chance of a near-term failure on the remaining original line and ensures matched materials and fittings for consistent performance.
Are aftermarket oil cooler hose kits reliable for the Kia Soul?
Aftermarket hose kits can be reliable provided they list explicit fitment for the Kia Soul, use oil-rated materials, and include proper fittings and sealing hardware. Look for detailed material specs and customer feedback about longevity. Kits that replicate OEM routing and include brackets or clips usually simplify installation and reduce the risk of improper routing.
What should I do if I find a leak at an oil cooler line fitting?
First, clean the area to confirm the leak source, then inspect the fitting, sealing washer, or O-ring for damage. Tightening a loose fitting may stop minor seepage, but damaged seals typically need replacement. If the line or fitting is corroded or cracked, replacing the affected components is the safer option to prevent recurring leaks.
How difficult is oil cooler line install on a Kia Soul for a DIYer?
Difficulty depends on engine access and your familiarity with basic automotive tools. Many installs require moderate disassembly to reach fittings and may need replacement sealing hardware. If you are comfortable with fluid handling and have basic hand tools, you can manage the job, but allow time for proper bleeding and inspection to ensure leak-free connections.
How We Chose the Best Kia Soul Oil Cooler Lines
We focused on product attributes that matter for Kia Soul oil cooler lines: proper OEM-equivalent fitment to the Kia Soul’s feed and return ports, hose and tube materials rated for engine oil and high temperatures, secure fittings and crimps designed to prevent seepage, and durability under repeated thermal cycling. We also evaluated ease of installation based on common hand tools and typical access in a Kia Soul engine bay, plus the availability of complete hose kits versus single-line replacements. Exclusions: we did not include items that lack clear fitment information for the Kia Soul, hoses made from unspecified or non-oil-rated materials, or parts that require extensive modification to install. The shortlist prioritizes documented fitment, material specs, and construction quality as primary decision dimensions.
Our full evaluation process is outlined in our review methodology.
Conclusion
Prioritize fitment, material quality, and secure fittings when choosing oil cooler lines for a Kia Soul. Those factors most directly affect leak resistance, longevity, and how the lines tolerate engine heat and vibration. Balance ease of installation and abrasion protection against long-term durability. Replacing worn lines proactively or choosing a complete hose kit with appropriate seals can reduce the risk of downtime and protect the engine from oil loss.
Explore More:
- Check out all Kia Soul parts & accessories
- Explore Cooling System
- Browse all Auto Parts
