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Replacing worn or leaking oil cooler lines is a practical way to protect your Acura TSX engine from oil starvation and overheating. Choosing the right oil cooler lines matters because poor fitment or substandard materials can cause leaks, reduced oil pressure, or premature failure. This guide covers our seven shortlisted oil cooler line options for the Acura TSX, selected for fitment quality, material construction, and leak resistance. Below we explain the evaluation criteria so you can pick the best option for your repair or upgrade.
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Top Picks at a Glance
| Best Reviewed A top-rated pick with lots of positive feedback | NOVAPARTS Engine Oil Cooler Line with Gaskets (15767-31020) |  |
| Most Popular A crowd favorite that many people choose with confidence | A-Premium Inlet and Outlet Engine Oil Cooler Line Hose Assembly |  |
| Best Quality Built to a higher standard if you want something more solid | Dorman Transmission Oil Cooler Line 624-097 (OE Fix) |  |
| Best Budget The cheapest option that still gets the job done reliably | H-Jun Transmission Cooler Line Connector (M14x1.5), 2-pack |  |
| Most Sold A high-volume bestseller chosen again and again | A-Premium Engine Oil Cooler Line Hose Assembly |  |
| Best Value for Money The sweet spot between price and what you get | A-Premium Transmission Oil Cooler Line Hose Assembly |  |
| Best Overall The best all-around choice for most situations | DICMIC Engine Oil Cooler Line Lower Pipe Assembly with Gaskets |  |
1. NOVAPARTS Engine Oil Cooler Line with Gaskets (15767-31020)
| Brand | NOVAPARTS |
|---|---|
| Manufacturer Part Number | USB-625-022 |
| OEM Part Number | 15767-31020, 15785-31010, 11496-31010, 5801326, 625-022 |
| Fitment note | Designed for select Toyota and Lexus 3.5L models |
This NOVAPARTS oil cooler line is a metal pipe assembly supplied with two gaskets to replace a failing or leaking factory oil cooler connection. It is intended to be installed where the original rigid oil cooler line attaches to the engine and cooler, so the typical use is swap-out during a coolant or oil-cooling repair to stop leaks and restore proper flow. Buyers will notice it comes preformed to match factory routing and includes gaskets so you do not have to source seals separately. The practical benefits are straightforward: a durable metal replacement reduces the recurring failures that rubber hoses develop and can be installed with basic hand tools by someone comfortable working under the hood. Limitations to expect are occasional fitment differences between aftermarket and factory parts that may require minor clean-up of mating surfaces or careful bolt access; some buyers reported interference with a rear bolt on certain model years. Also this part’s listing covers Toyota and Lexus fitments only, so confirm compatibility before purchase.
Best for: A reliability-focused buyer who prioritizes a durable, factory-style replacement to stop oil cooler leaks and avoid repeat failures during ownership.
Less Ideal for: Drivers seeking a universal or multi-vehicle repair solution or those who cannot access confined engine fasteners without professional help should consider alternatives.
- Includes two gaskets so you can install without sourcing seals separately.
- Rigid metal construction reduces risk of soft-hose failures and leaks over time.
- Preformed routing intended to match factory attachment points for quicker installation.
- Aftermarket bends may differ from the original part on some model years making bolt access difficult.
- May require minor cleaning or light surface prep on flanges to achieve a leak-free seal.
- Fits specific vehicle models only and is not a universal hose.
Verdict A practical, gasket-included metal replacement for stopping oil cooler leaks, but check fit carefully for some model-year variations.
2. A-Premium Inlet and Outlet Engine Oil Cooler Line Hose Assembly
| Material | Rubber/Metal |
|---|---|
| Maximum Pressure | 1500 Pound per Square Inch |
| Fitment Type | Direct Replacement |
| OEM Part Number | 625-122, 625122, 5801002, 15194577, 15757070 |
This oil cooler line assembly replaces the inlet and outlet hoses that route oil from the filter to the radiator. It is intended as a direct replacement and is constructed from rubber and metal components with included gaskets or seals. In practice the lines install like a factory-quality replacement on many applications but may require patience and slight fitting adjustments at the radiator fittings to seat securely. The hose assembly is corrosion-resistant and rated to high pressure, which helps prevent leaks under normal operating conditions. Buyers should expect basic hand tools and some trimming or fine-tuning during installation in tight spaces. While the set matches OEM reference numbers and comes with a manufacturer guarantee, fitment and bend accuracy can vary, so check compatibility carefully for the Acura TSX and be prepared to tweak routing for a clean installation.
Best for: Convenience-driven buyers who want a ready-made replacement that aims to match factory parts and prefer a straightforward swap with minimal sourcing hassle.
Less Ideal for: Drivers seeking a perfect drop-in part without any installation tweaks or those who need a custom-shaped or performance-upgraded oil cooler solution.
- Direct-replacement design intended to match factory routing
- Rubber and metal construction with included gaskets for leak resistance
- Corrosion-resistant materials and a high maximum pressure rating
- Comes with manufacturer-backed guarantee
- May require filing or minor fitting adjustments at the radiator connections
- Bend geometry can be slightly off, requiring extra routing work
Verdict A convenient, factory-style replacement oil cooler line set that usually fits with minor adjustment but may need trimming or routing tweaks for a perfect installation on the Acura TSX.
3. 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 a direct-style replacement that secures the rubber hose to the metal tube with a crimped connection intended to be stronger and more corrosion resistant than the original spring-clamped design. It is typically used when a vehicle develops leaks or rust at the cooler line connections; installation requires removing and routing the radiator cooling components to access the fittings. Notable features include the crimped hose-to-tube junction for greater joint strength and an application-specific shape meant to match factory routing. In real-world use the reinforced connection reduces the common failure point between rubber and metal, which should extend service life and cut down on repeat repairs. Several users report straightforward fitment and supplied clips make reattachment easier, but others needed minor end modifications or careful alignment to prevent leaks. Expect the installation to take a few hours and plan for coolant handling and possible transmission fluid checks during the job.
Best for: Performance-oriented owners who prioritize reliable, longer-lasting repairs and want a factory-style replacement that addresses the common corrosion failure point.
Less Ideal for: If you need a universal or adjustable hose solution for multiple vehicle models or want a no-disassembly quick fix, this specific replacement line is not the best choice.
- Crimped hose-to-tube joint rated significantly stronger than the original clamp, improving corrosion resistance
- Made to match factory routing so it can replace the original line without major rerouting
- Comes with necessary clips and fittings for reattachment to crossmembers and housings
- Durable metal and rubber construction designed for transmission fluid service
- May require careful alignment or minor end modification on some vehicles to achieve a leak-free fit
- Installation can be labor intensive because of radiator/fan removal and coolant handling
Verdict Choose this Dorman line if you want a factory-style replacement built to reduce corrosion failures at the hose-to-tube connection, but allow time for a moderate install.
4. H-Jun Transmission Cooler Line Connector (M14x1.5), 2-pack
| Material | Brass |
|---|---|
| Thread size | M14x1.5 |
| Included components | 2 connectors |
This 2-pack of H-Jun transmission cooler line connectors is a straightforward replacement fitting intended to reconnect transmission cooler lines to a radiator or cooler. Made from brass with a zinc-colored finish and M14x1.5 thread, the parts are packaged for basic service repairs and intended to match factory-style fittings. In practice these are used during radiator or cooler replacement when the original fittings are missing, corroded, or damaged. The brass construction gives corrosion resistance compared with cheaper plastics, and reviewers report easy installation and good fit when the correct size is chosen. Limitations appear in quality control: one reviewer reported a failure that damaged the transmission, so careful inspection and correct sizing are essential before installation. This is a budget-focused replacement that can save money on a minor cooling-line repair, but buyers should verify fitment carefully and consider professional installation if unsure.
Best for: Budget-conscious owners who prioritize low-cost, do-it-yourself repairs and want a cheap factory-style replacement for a worn cooler line fitting.
Less Ideal for: Anyone seeking a lifetime or heavy-duty upgrade or users who prefer aftermarket fittings with reinforced sealing features should look at more robust options.
- Brass construction offers better corrosion resistance than plastic fittings
- Sold as a 2-pack for replacing both cooler line connections at once
- Threaded M14x1.5 sizing matches common factory-style transmission cooler fittings
- Compact, simple design that installs with basic hand tools
- Fitment is size-specific so wrong choice requires returning or replacement
- Quality control appears inconsistent based on user reports, risking premature failure
Verdict A low-cost, brass direct-replacement connector for cooler-line repairs that works well when the correct size is chosen but requires careful fit verification due to variable quality.
5. A-Premium Engine Oil Cooler Line Hose Assembly
| Material | Steel |
|---|---|
| Fitment Type | Direct Replacement |
| Manufacturer Part Number | APOCL130 |
| OEM Part Number | 625-168, 5801274, 15203890, 15765439, 625168 |
This A-Premium oil cooler line assembly is a direct-replacement aftermarket hose and metal line intended to restore oil flow between the engine and oil cooler. It is typically used when a leaking or damaged cooler line needs replacement to stop oil loss and prevent engine overheating. The part is built from steel with corrosion-resistant construction and ships with factory-replacement style fittings and reference numbers to match original plumbing. In real-world use buyers report generally good fit and leak-free performance when installed correctly, and some installers note the lines can be installed without major modifications. Important limitations are occasional quality-control issues at crimps that can cause alignment or leak problems, so inspect connections before installation and be prepared to reorient fittings or replace if defective. This part is a practical, lower-cost option to return oil-cooling plumbing to service but buyers seeking guaranteed perfect fit may prefer higher-end or dealer-sourced lines.
Best for: Risk-averse, mainstream buyers who prioritize restoring a vehicle to reliable working condition without paying dealer prices and who prefer a direct-replacement aftermarket part to get the oil cooling system back to service.
Less Ideal for: Shoppers who require guaranteed factory-specific fit for an Acura TSX or who want premium, inspected components from a dealer should consider OEM or vehicle-specific parts instead.
- Direct-replacement design intended to match factory routing and fittings
- Steel, corrosion-resistant construction aimed at leak-free service
- Available reference OEM part numbers to help verify compatibility
- Many buyers report straightforward installation and good fitment
- Some units show poor crimp alignment at joints which can require modification
- Not specifically produced for Acura TSX so fitment for that vehicle is not confirmed
Verdict A practical, lower-cost direct-replacement oil cooler line that can restore function for compatible vehicles but watch for crimp quality and confirm fitment for an Acura TSX before buying.
6. A-Premium Transmission Oil Cooler Line Hose Assembly
| Material | Metal |
|---|---|
| Hose Maximum Pressure | 100 PSI |
| Fitment Type | Direct Replacement |
This A-Premium transmission oil cooler line is a factory-replacement style hose and metal line assembly intended to carry transmission fluid from the radiator inlet to the transmission. It is used when the original cooler line leaks, corrodes, or is damaged by road debris. The assembly combines formed metal tubing with a hose section and factory-style fittings so it follows the factory routing and connects at the same points on compatible vehicles. Buyers will appreciate the line's fit-first design and straightforward swap-in installation that often only requires basic hand tools and modest vehicle disassembly. Limitations include narrower application breadth and some reports of differences at the transmission connection compared with the original, so confirm the connection type and bends against the part being replaced before ordering. The product is a practical, cost-conscious option for routine transmission cooler line replacement when an OEM-style fit is the priority.
Best for: Practical optimizers who prioritize a sensible, budget-aware repair solution and want a direct-replacement cooler line that installs cleanly and restores normal transmission cooling function.
Less Ideal for: Buyers seeking a performance or heavy-duty aftermarket upgrade, or those who cannot confirm exact fitment to their vehicle should look at alternative heavy-duty or vehicle-specific options.
- Designed as a direct replacement to match factory routing and mounting points
- Combination of metal tubing and hose for durability where flexibility is needed
- Straightforward installation that typically requires only basic tools
- Fits multiple GM vehicles in the listed fitment range so it covers common model years
- Fitment is specific to certain GM models and requires verifying bend shapes and connection sizes before installation
- Not explicitly described as a performance upgrade over factory parts
Verdict A cost-conscious, direct-replacement cooler line that restores factory routing and function when fitment is confirmed.
7. DICMIC Engine Oil Cooler Line Lower Pipe Assembly with Gaskets
| Compatible models listed | Lexus RX350/RX450h, Toyota Highlander, Sienna, Venza (as specified) |
|---|---|
| Position | Lower supply & return |
| Package contents | 1 oil cooler line and 2 gaskets |
| Manufacturer part number | DICMIC-D261 |
This lower oil cooler line assembly replaces the factory lower supply and return lines and comes with two metal gaskets for sealing. It is typically used when the original pipe corrodes or leaks, and installation requires reaching tight studs under the engine and swapping the old hoses for the new metal line. Notable aspects include full-metal construction that reviewers say is sturdier than some OEM combinations of rubber and metal, and packaged gaskets to complete the seal. In practice the line fits closely into a confined space so basic hand tools, a short extension, and some patience are required; some customers smoothed minor brazing irregularities before installation. The part can restore oil pressure and stop leaks when installed correctly, but it may require removal of small studs and careful gasket seating to avoid leaks. There are no installation instructions in the package, so expect to follow a repair guide or video if you are not experienced with under-engine work.
Best for: Balanced buyers who prioritize a durable, cost-effective factory-quality replacement and are comfortable following repair guides or performing moderate under-engine work.
Less Ideal for: If you want a plug-and-play swap with step-by-step instructions included or you will not tolerate any minor finish work on the part, consider having a shop install a factory replacement instead.
- Metal-only pipe construction reduces reliance on rubber hose sections and can be more durable than mixed-material assemblies
- Includes two metal gaskets so you have the required sealing parts for reassembly
- Reported to fit tightly and align with factory mounting points for a proper seal when installed carefully
- Positive user feedback indicates reliable performance after replacement in similar vehicles
- No printed installation instructions included so DIYers must source guidance from manuals or videos
- Occasional minor manufacturing blemishes reported that may need light refinement before installation
Verdict A sturdy, full-metal lower oil cooler line that delivers a practical, budget-friendly factory-style replacement if you are willing to follow a repair guide for installation.
Choosing the Right Acura TSX Oil Cooler Lines: Key Factors to Consider
Material and Heat Resistance
The line material determines how well the assembly tolerates continuous exposure to hot engine oil and ambient underhood temperatures. Lines made from high-grade rubber with synthetic inner liners or braided stainless steel offer different tradeoffs in flexibility, abrasion resistance, and longevity.
Heat-resistant materials slow down oil degradation and reduce swelling or softening that can lead to leaks. Consider the maximum operating temperature rating and whether the material resists oil additives and contaminants commonly found in service environments.
Fitting and Connector Quality
Fittings are common failure points, so look for precision-machined connectors and secure crimping or swaging where hoses join fittings. Properly designed fittings maintain seal integrity under pressure cycles and vibration.
Threaded or flare-style fittings should match the vehicle’s factory specifications to avoid cross-threading or poor sealing. Check for corrosion-resistant plating or coatings that extend the life of metal fittings in wet or salty conditions.
Fitment and Compatibility
Correct fitment reduces installation time and the chance of stress on the lines from routing that binds or rubs on other components. Ensure the product explicitly states compatibility with the Acura TSX and includes the correct lengths and bends for feed and return routing.
Kits that include mounting brackets, clips, or exact-length lines typically result in a neater install and lower risk of chafing against adjacent parts. If a kit requires additional adapters, factor that into the overall repair plan.
Pressure Rating and Leak Resistance
Oil cooler lines must withstand the system’s oil pressure without bulging or failing. Review pressure ratings and the construction method used to achieve them, such as multi-layer hoses or reinforced braided coverings.
Higher pressure tolerance reduces the likelihood of leaks under hard driving or during cold starts. Leak-resistant designs often pair robust hose materials with secure fittings and quality sealing methods like O-rings or crush washers where appropriate.
Maintenance and Serviceability
Consider how easy the lines are to inspect, service, or replace in the future. Kits that allow individual component replacement, such as separate fittings or hoses, can reduce long-term maintenance costs and downtime.
Also think about whether the design permits straightforward detection of leaks and access for routine checks. Components that are easily accessible without extensive disassembly make ongoing maintenance simpler.
Included Hardware and Completeness
A complete kit should include all necessary fittings, clamps, brackets, and seals to perform a clean replacement without scavenging parts. Missing hardware can lead to improvisation and potential reliability issues.
Verify that the kit includes both feed and return lines when applicable, and that any required adapters are specified. Documentation or install guides included with the kit can significantly reduce installation errors.
FAQ
How do I know when my Acura TSX oil cooler lines need replacement?
Common signs include visible oil leaks under the vehicle, decreased oil level without an obvious source, or oil on nearby engine components. You may also notice oil smell in the engine bay or reduced oil pressure. Regular visual inspections can catch cracking, swelling, or chafing before a failure occurs.
Can I replace just one oil cooler line or should I replace both feed and return lines?
Often both lines age at similar rates because they experience the same environment and stressors. Replacing both feed and return lines at the same time reduces the chance of a near-term failure of the remaining line and ensures consistent material and fitting condition across the system.
What tools or skills are typically required for oil cooler line install on an Acura TSX?
Basic hand tools, such as wrenches, line wrenches, and socket sets, are usually required, plus possible pliers for clamps. Some installs may need a jack and stands for access. Mechanical familiarity and attention to correct torque for fittings help prevent leaks. If routing or bracket removal is complex, light experience with vehicle repairs is helpful.
Are braided stainless steel lines better than rubber lines for this application?
Braided stainless lines offer superior abrasion resistance and can handle higher temperatures, but they may be less flexible and sometimes transmit more vibration. High-quality rubber or synthetic hoses with proper reinforcement can provide adequate performance and easier routing. The best choice depends on your priorities for durability, flexibility, and ease of install.
What should I do if I suspect an oil cooler line leak but cannot locate the source?
Clean the area around the oil cooler lines and run the engine briefly to pressurize the system while observing for fresh oil. Using a clean white rag can help detect small drips. If the leak persists but the source is unclear, a professional inspection can identify hidden weeps at fittings, freeze plugs, or nearby components.
How We Chose the Best Acura TSX Oil Cooler Lines
We focused on options that offer direct fitment to the Acura TSX and prioritized construction quality and long-term durability. Key evaluation criteria included hose and line material (resistance to heat and oil exposure), connector and fitting design (to minimize leak points), manufacturing tolerances for proper fit, and overall ease of installation. We also considered resistance to abrasion and oil breakdown, and whether the assemblies include both feed and return lines or require additional fittings. We excluded generic, universal lines that require extensive modification and assemblies lacking clear specifications for fitment to the Acura TSX. We also excluded options with unclear materials or unknown compatibility. The resulting list emphasizes products and kits that balance robust materials, reliable fittings, and straightforward replacement or install procedures for this vehicle.
Our full evaluation process is outlined in our review methodology.
Conclusion
Prioritize fitment accuracy, durable materials, and quality fittings when choosing oil cooler lines for an Acura TSX. Those factors most directly affect leak risk, longevity, and ease of installation. Balance pressure ratings and heat resistance against flexibility and serviceability to match your intended use. Replacing both feed and return lines together and choosing a kit with complete hardware simplifies repairs and reduces the chance of repeat service.
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