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If you drive a Toyota Avalon, keeping the oil cooling system in good shape helps protect the engine and maintain consistent performance. Choosing the right oil cooler lines matters because degraded lines can lead to leaks, low oil pressure, and costly repairs.This guide covers seven shortlisted oil cooler lines that made our list after evaluating build quality, fitment accuracy, and leak resistance. Read on to understand the criteria we used and what to look for when replacing or repairing oil cooler lines on your Avalon.
Looking for other parts? See all Toyota Avalon parts & accessories.
Top Picks at a Glance
| Best Overall The best all-around choice for most situations | ktwend Oil Cooler Line and Gasket Kit for Toyota (fits Avalon, Camry, RAV4, Highlander, Sienna, Venza) |  |
| Best Quality Built to a higher standard if you want something more solid | Dorman Engine Oil Cooler Hose Assembly for Select Lexus/Toyota Models |  |
| Best Value The sweet spot between price and what you get | ZEIRTOEV Engine Oil Cooler Line and Gasket Kit for Toyota Avalon (fits select 2009–2018 models) |  |
| Best Budget The cheapest option that still gets the job done reliably | Taruimoo Oil Cooler Line for Toyota 3.5L Engines (Replacement for 15772-31030) |  |
| Highest Rated A top-rated pick with lots of positive feedback | Toyota Genuine Parts Oil Pipe No.2 (15772-31030) |  |
| Most Popular A crowd favorite that many people choose with confidence | OKAY MOTOR Lower Engine Oil Cooler Pipe and Gasket Set for Toyota Highlander/Sienna/Venza & Lexus RX 3.5L V6 |  |
| Best Seller A high-volume bestseller chosen again and again | A-Premium Front Upper Engine Oil Cooler Line Hose Assembly |  |
1. ktwend Oil Cooler Line and Gasket Kit for Toyota (fits Avalon, Camry, RAV4, Highlander, Sienna, Venza)
| Included Components | 1 oil cooler hose, 5 gaskets |
|---|---|
| Material Type | Polyester, Rubber |
| Compatible Models | Avalon, Camry, RAV4, Highlander, Sienna, Venza (2009–2018) |
| Replaces Part Numbers | 15772-31030, 90430-16016, 90430-16017 |
This ktwend oil cooler line and gasket kit supplies a replacement rubber hose and five gaskets intended to restore oil flow through the engine oil cooler and prevent leaks on compatible Toyota vehicles. It is typically used when the original cooler line shows cracks, leaks, or has been removed during service; installation requires swapping the banjo-style fittings and sealing washers and securing the mounting bracket. The kit uses reinforced polyester and rubber construction for heat and oil resistance, and the included gaskets simplify getting a basic repair done without sourcing parts separately. In practice the hose appears serviceable and the materials are appropriate for an engine bay application, but the supplied washers and a mounting clip may not fit some factory bolts or bracket orientations, so you may need to reuse OEM washers or adjust the bracket during installation. For a balanced buyer looking for a cost-effective replacement, this kit covers the core parts needed to fix a leaking cooler line but plan for a brief fitment check and possibly minor parts swapping at install.
Best for: Balanced all-round Toyota owners who want an affordable, ready-to-install replacement to repair a leaking or damaged oil cooler line and prefer a practical fix over buying dealer parts.
Less Ideal for: If you require exact factory-match fittings and hardware without any modification or part reuse, consider a factory-quality replacement or dealer-sourced line instead.
- Reinforced rubber and polyester hose designed for oil and heat resistance
- Includes five gaskets so you get sealing hardware with the hose
- Covers common Toyota models (Avalon, Camry, RAV4, Highlander, Sienna, Venza) across 2009–2018 model years
- Simple kit format that lets DIYers replace a leaking cooler line without sourcing multiple parts
- Included washers and mounting clip may not fit factory banjo bolts or bracket orientation and could require reuse of OEM parts
Verdict: A cost-conscious, complete hose-and-gasket kit that restores oil cooler function on specified Toyota models without needing multiple separate parts.
2. Dorman Engine Oil Cooler Hose Assembly for Select Lexus/Toyota Models
| Material Type | Metal |
|---|---|
| Item Type Name | Engine Oil Cooler Line |
| Unit Count | 1.0 Count |
| Included Components | Oil Cooler Line |
This Dorman engine oil cooler hose assembly replaces the original flexible lines with a corrosion-resistant metal assembly intended to restore proper oil circulation between the engine and the oil cooler. It fits select Lexus RX and Toyota Highlander, Sienna, and Venza model years listed by the manufacturer and installs in place of the factory hose using existing mounting points and gaskets. The metal construction reduces the risk of rubber hose swelling or failure and should hold up better in high-heat or longer-term service than the original rubber lines. Installation can be fiddly in tight engine bays and may require an E8 Torx socket and basic hand tools; some customers found removing studs simplifies the process. A few early listings reported fitment or missing gasket issues, so confirm trim-year compatibility before buying and check the package contents on receipt. For owners seeking a durable, performance-oriented replacement that mimics factory fit and improves longevity, this is a practical upgrade.
Best for: Performance-oriented buyers who prioritize long-term reliability and want a sturdier, metal replacement for factory oil cooler lines to reduce failure risk under higher heat or sustained use.
Less Ideal for: Owners who prefer a plug-and-play OEM-sourced part with guaranteed identical fit without any installation fiddling should consider factory replacement options instead.
- Metal construction offers greater resistance to heat and swelling compared with rubber lines
- Direct-replacement design mounts to factory locations for straightforward restoration of oil circulation
- Includes metal gaskets and hardware to match sealing surfaces
- Quality control and brand support from a long-established aftermarket manufacturer
- Installation can be tight and may require specialty sockets or partial removal of studs
- Some listings reported incorrect weld angles or missing gasket pieces, so verify contents before installation
Verdict: A metal, factory-style replacement oil cooler hose assembly built to improve durability and reduce the risk of rubber line failure on compatible Toyota and Lexus models.
3. ZEIRTOEV Engine Oil Cooler Line and Gasket Kit for Toyota Avalon (fits select 2009–2018 models)
| Material Type | Plastic |
|---|---|
| Fitment | Compatible with Avalon 2009-2018 |
| Package Include | 1 hose, 4 gaskets |
This ZEIRTOEV kit supplies a replacement engine oil cooler line plus three gaskets intended as a direct-fit repair for select Toyota Venza, Camry, RAV4, Sienna, Highlander and Avalon model years. It is sold as a ready-to-install assembly and is made from plastic, which keeps weight and cost low and makes it straightforward for a DIY or independent-shop swap. The included gaskets simplify reassembly and should save a trip to the parts counter. Because the hose is plastic, it offers decent corrosion resistance compared with some metal lines, but plastic can be less durable under long-term heat and oil exposure than OEM metal options. This kit is best used when you need an economical, immediate replacement to restore oil flow to the cooler; for higher-mileage engines or heavy-duty duty cycles consider upgrading to a metal line. Fitment claims list Avalon through 2018, so verify year and engine before installation to ensure compatibility.
Best for: Practical optimizers who want a low-cost, ready-to-install replacement that fixes oil cooler line leaks quickly and keeps repair costs down.
Less Ideal for: Owners looking for a heavy-duty, long-term upgrade for high-mileage or high-temperature use should consider a metal aftermarket or factory-quality replacement instead.
- Complete kit: hose plus three gaskets included for a single repair job.
- Direct-replacement fitment claimed for multiple Toyota models including Avalon 2009–2018.
- Plastic construction resists corrosion and keeps the part lightweight and inexpensive.
- Includes gaskets which reduce parts sourcing time and simplify installation.
- Plastic material is less heat- and abrasion-resistant than metal lines for very high-mileage or heavy-duty use.
- Limited public review data and low sales rank provide less real-world feedback than established OEM parts.
Verdict: An affordable, ready-to-install oil cooler line kit that restores function quickly for Avalon owners seeking practical, budget-conscious repairs.
4. Taruimoo Oil Cooler Line for Toyota 3.5L Engines (Replacement for 15772-31030)
| Compatible With | Toyota Sienna Highlander RAV4 Camry Avalon Venza 3.5L Engine |
|---|---|
| Replaces Part Number | 15772-31030, 90430-16016, 90430-16017 |
| Included Components | 1* 15772-31030 oil cooler line |
| Brand Name | Taruimoo |
This Taruimoo oil cooler line is an economical factory-replacement style hose intended for Toyota vehicles with the 3.5L engine family. It is used to route oil between the engine and cooler and replaces OEM part 15772-31030 and equivalent numbers. The listing emphasizes heat-exchange performance and sealing, and the metal-lined construction and fittings look consistent with a direct-fit replacement for the specified models. Installation is described as straightforward and usually requires no special tools, so it is a practical option for DIYers or mechanics doing a routine oil cooler service. Being a budget aftermarket part, expect variable fitment tolerance and finish compared with factory parts, and long-term durability may differ from OEM. Overall it offers a low-cost way to restore oil cooling function when the original line is leaking or damaged, but buyers who need guaranteed long-term OEM parity may prefer a branded factory-quality alternative.
Best for: Budget-conscious owners looking to repair an oil cooler line on a Toyota Avalon with a 3.5L engine who prioritize low upfront cost and a quick direct replacement.
Less Ideal for: Shoppers who need verified long-term OEM-equivalent durability or prefer parts from established factory suppliers should consider higher-end or OEM-branded lines instead.
- Direct replacement for Toyota 3.5L applications listed, replacing part 15772-31030
- Budget-friendly option compared with factory parts
- Stated construction aimed at improved heat transfer and sealing
- Simple installation that typically requires no special tools
- Aftermarket fit and long-term durability may be less consistent than factory-quality parts
- Limited seller reputation and few customer reviews to verify real-world longevity
Verdict: A low-cost direct-replacement oil cooler line for Toyota 3.5L engines that gets cooling function back in service without a high parts bill.
5. Toyota Genuine Parts Oil Pipe No.2 (15772-31030)
| Manufacturer | Toyota |
|---|---|
| Model | Oil Pipe |
| Exterior | Machined |
| Manufacturer Part Number | 15772-31030 |
This is the factory-quality Toyota oil pipe (part 15772-31030) intended as a direct replacement for the original oil supply line on compatible Toyota V6 engines. It installs in place of the worn or damaged line and is typically used when servicing the oil cooler or replacing a leaking oil feed. The machined metal construction and OEM fitment deliver a precise connection to banjo fittings and mounting points, so installation is straightforward for anyone following factory procedures. Buyers report it fits 2GR-FE applications such as Avalon, Highlander, and RAV4 models when the service steps are followed, and reviewers recommend replacing crush washers and the inline filter during installation. The main limitation is that this is a vehicle-specific OEM part so you must confirm exact fitment for your model and have the small hardware and gaskets on hand since they are not included. For reliability-focused owners this part restores factory routing and sealing without the uncertainty of aftermarket substitutes.
Best for: Reliability-focused owners who prioritize factory-quality replacements to maintain original oil cooler function and long-term dependability.
Less Ideal for: Buyers looking for a universal or multi-vehicle aftermarket solution or those who need replacement hardware included with the hose.
- Genuine Toyota OEM part built to factory specifications
- Machined metal exterior for durable, leak-resistant connections
- Direct fit for compatible Toyota V6 engines when vehicle-specific
- Restores factory routing and sealing for the oil supply system
- Does not include crush washers, gaskets, or inline filter required for a complete install
- Fitment is vehicle-specific so verification is required before purchase
Verdict: Choose this Toyota genuine oil pipe when you want a factory-quality, vehicle-specific replacement to preserve original oil cooler performance.
6. OKAY MOTOR Lower Engine Oil Cooler Pipe and Gasket Set for Toyota Highlander/Sienna/Venza & Lexus RX 3.5L V6
| Fitment | 2007-2016 Toyota Highlander / 2007-2016 Toyota Sienna / 2011-2015 Venza / 2007-2015 Lexus RX350 / 2010-2015 RX450h |
|---|---|
| Includes | Oil cooler line plus two gaskets |
| Manufacturer | Okay Motor Products |
| Manufacturer Part Number | 625-022 |
This OKAY MOTOR kit replaces the lower engine oil cooler pipe and includes the two gaskets needed for a direct replacement on compatible 3.5L V6 Toyotas and Lexus RX models. It is intended for routine repair when the original rubber pipes crack or the metal line corrodes, and it installs where the factory cooler line connects between the oil cooler and engine. Buyers will appreciate that the set includes both gaskets so you can complete the job in one visit to the shop. The part is an aftermarket reproduction sold as brand new and reviewers report straightforward fitment and reliable sealing when installed carefully. Expect installation to require access in a tight area and a variety of sockets and extensions; some users note removing a stubborn stud is difficult. Packaging and finish are not always showroom perfect but do not affect function. This is a practical, low-cost alternative to dealer replacement that restores proper oil cooler routing and stops leaks, provided you verify part numbers or VIN fitment before ordering.
Best for: Convenience-driven owners who want a single, ready-to-install replacement kit that lets them fix a leaking or failed oil cooler line quickly without sourcing gaskets separately.
Less Ideal for: Those who prefer dealer-sourced parts with guaranteed factory packaging or buyers unwilling to do a moderately technical installation should consider alternatives.
- Includes both cooler pipe and matching gaskets so you can replace the whole lower line in one service
- Built to match factory fit points for Toyota Highlander, Sienna, Venza and Lexus RX 3.5L V6 applications listed
- Many buyers report solid fit and leak-free performance after installation
- Lower-cost aftermarket option compared with dealer replacement
- Some installations are difficult due to tight access and hard-to-reach studs or fasteners
- Finish and packaging quality vary between units and may require minor adjustment before install
Verdict: A convenient aftermarket replacement kit that supplies the lower oil cooler pipe and gaskets so you can repair leaking cooler lines on 3.5L Toyota and Lexus V6 models in one go.
7. A-Premium Front Upper Engine Oil Cooler Line Hose Assembly
| Manufacturer | PremiumpartsWhosale |
|---|---|
| Brand | A-Premium |
| Material | Steel |
| Fitment Type | Direct Replacement |
| OEM Part Number | 625-519, 5801461, 1577131010, 625519 |
This A-Premium front upper oil cooler line is a direct-replacement steel line intended to restore oil flow between the engine and oil cooler on compatible Toyota and Lexus V6 vehicles. It is typically used when the factory line leaks or is damaged and installs in the same routing as the original part. The line arrives as a single steel assembly with factory-style fittings and includes a fitment list for Avalon, Camry, Highlander, RAV4, Tundra and several Lexus V6 models. Practical benefits are straightforward: a metal construction that resists collapse under oil pressure, direct-replacement fitment that simplifies installation, and a one-year unlimited-mileage guarantee for added peace of mind. Important limitations are that this listing is for the front upper line only, not the rear or other cooler hoses, and buyers must verify the exact reference number against the vehicle service information to ensure they order the correct side and revision. Expect a straightforward repair for the specific front upper cooler line application but confirm part number before purchasing.
Best for: Risk-averse mainstream buyers who prioritize a factory-style replacement and want a straightforward, confidence-building repair for the Avalon and similar Toyota V6 models.
Less Ideal for: Buyers who need a rear oil cooler line, a universal hose solution, or who have a revised service bulletin part number should look for the exact part specified by their dealer or repair manual.
- Steel construction provides durability and resistance to oil pressure
- Direct-replacement fitment for many Toyota and Lexus V6 models reduces installation complexity
- Includes manufacturer part numbers and reference numbers to help confirm compatibility
- One-year unlimited-mileage guarantee offers additional confidence for buyers
- Specified as the front upper line only, so it will not replace rear or alternative cooler lines
Verdict: A factory-style steel front upper oil cooler line built as a direct replacement for many Toyota and Lexus V6 models to restore proper oil cooling reliably.
Choosing the Right Toyota Avalon Oil Cooler Lines: Key Factors to Consider
Material and Corrosion Resistance
Material choice affects longevity. Steel lines with corrosion-resistant coatings or stainless-steel braided hoses resist salt, road grime, and heat-related degradation better than untreated metals.
Rubber sections need to be formulated for oil resistance and high temperatures. Over time, inferior materials can swell, crack, or lose structural integrity, leading to leaks and reduced oil pressure. Prioritize materials that explicitly list temperature and chemical resistance ratings when possible.
Fitment and Routing Accuracy
Correct fitment reduces stress on connections and prevents chafing against adjacent components. Lines that match OEM routing points and mounting brackets minimize vibration and bending moments that can accelerate failure.
Improperly routed lines may rub on engine parts or be stretched at connections, increasing the chance of a rupture. Confirm that mounting brackets, bolt holes, and hose lengths align with the vehicle's factory layout to simplify installation and improve long-term reliability.
Fittings and Sealing Methods
The design and quality of fittings determine how well a line seals under pressure. Flared fittings, crimped hose ends, and robust threaded adapters each have tradeoffs in sealing reliability and serviceability.
Look for fittings machined to tight tolerances and designs that use crush or O-ring seals where appropriate. Poorly made fittings can loosen or leak as thermal cycles cause expansion and contraction, so secure sealing methods are vital for preventing oil loss.
Pressure Rating and Reinforcement
Oil cooler lines are exposed to system pressure and pulses. Hoses reinforced with braided layers or internal reinforcement are less likely to bulge or burst under pressure spikes.
Verify that any hose sections meet or exceed the vehicle's expected pressure range. Under-rated components may hold initially but can degrade quickly, especially if the engine sees sustained high load or temperature conditions.
Ease of Installation and Serviceability
Installation complexity affects the time and tools required. Kits that include necessary brackets, clamps, and clear instructions reduce installation errors and the risk of leaks after fitting.
Consider whether fittings are reusable or if quick-disconnects require special tools. Easier installation also reduces the chance of overtightening or cross-threading, common causes of post-installation leaks.
Inspection and Maintenance Considerations
Designs that permit easy visual inspection of wear points make routine maintenance simpler. Smooth-running lines with accessible fittings allow quick checks for seepage or abrasion without disassembly.
Also consider whether replacement sections are available separately. Being able to service a worn segment rather than replace the entire assembly can save effort and limit downtime.
How We Chose the Best Toyota Avalon Oil Cooler Lines
We selected products based on factors that directly affect longevity and serviceability for Toyota Avalon oil cooler lines. Key criteria included material construction and corrosion resistance, since metal or braided assemblies resist heat and chemical exposure; OEM-equivalent or improved fitment, because correct routing and attachment points prevent stress and leaks; pressure rating and hose reinforcement, to handle engine oil pressure and thermal cycling; quality of fittings and sealing surfaces, which determine leak resistance; and ease of installation, including available hardware and clear instructions.We excluded parts that lacked explicit fitment information for the Toyota Avalon, items without verifiable material specifications, and assemblies intended only for other vehicle applications. The final list favors components that balance durable materials, proven sealing methods, and straightforward installation to minimize return visits and reduce the risk of oil loss while driving.
Our full evaluation process is outlined in our review methodology.
FAQ
How do I recognize a leak from an oil cooler line on my Toyota Avalon?
A leak often shows as oil spots under the vehicle, oil on surrounding components, or a drop in oil level. You may also notice oil smell or reduced oil pressure warnings. Inspect along the line, fittings, and attachment points for wetness or dirt buildup that indicates seepage.
Can I replace just a section of the oil cooler line instead of the whole assembly?
Sometimes a damaged section can be replaced if the assembly is designed with serviceable fittings or replaceable hose segments. However, many systems use integrated lines where replacing the entire assembly ensures correct routing and seal integrity. The appropriate approach depends on the line design and available replacement parts.
What causes oil cooler lines to fail prematurely?
Common causes include corrosion from road exposure, heat-related deterioration of hose materials, mechanical abrasion from improper routing, and stress at poorly supported fittings. Pressure spikes and repeated thermal cycling can also accelerate wear. Addressing mounting and protection can extend life.
Is it safe to drive with a small oil leak from a cooler line?
A small leak may not immediately disable the vehicle, but it increases the risk of significant oil loss and engine damage over time. Leaks can also contaminate nearby components and create fire hazards in extreme cases. It is usually best to repair or contain the leak promptly and monitor oil level closely until fixed.
Do aftermarket oil cooler lines affect engine oil temperature?
Aftermarket lines themselves do not directly change how the cooler performs unless they alter flow restrictiveness or are routed in a way that impacts cooling efficiency. Matching internal diameter and avoiding excessive bends helps preserve flow characteristics similar to the original design.
What should I bring when having oil cooler lines serviced or replaced?
Bring information about your vehicle model and year, and note any symptoms observed such as leaks or oil pressure changes. If you have the old line, bringing it in can help technicians confirm routing and fitting types. Clear symptom descriptions speed diagnosis and ensure correct parts are used.
Conclusion
When choosing Toyota Avalon oil cooler lines, prioritize material durability, correct fitment, and secure sealing methods. Those factors most strongly influence long-term reliability and reduce the chance of leaks or oil pressure problems.Balance ease of installation and pressure ratings against maintenance needs. Addressing routing and mounting during installation helps prevent premature failures and keeps the oil cooling system functioning reliably.
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