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If you own a Lexus IS, the oil pan is a small component that has outsized importance for engine health and routine maintenance. Choosing the right oil pan affects how well your engine holds oil, how easy oil changes and repairs are, and how vulnerable the sump is to corrosion or impact damage. This guide summarizes the top shortlisted options for Lexus IS oil pans, focusing on build quality, fitment accuracy, and corrosion resistance. Below we explain the criteria we used to shortlist these picks and what to watch for when selecting an oil pan for your vehicle.
Looking for other parts? See all Lexus IS parts & accessories.
Top Picks at a Glance
| Best Overall The best all-around choice for most situations | BOXI Engine Oil Pan for Lexus GS350/GS450h/GS430/GS460 and IS250/IS350 |  |
| Best Quality Built to a higher standard if you want something more solid | Sawyer Auto Replacement Lower Oil Pan for Lexus IS300 IS350 RC350 RC300 LS500h GS350 IS250 |  |
| Best Value The sweet spot between price and what you get | YHTAUTO Lower Engine Oil Pan Replacement for Lexus IS250/IS350 and GS300/GS350 (AWD) |  |
| Best Budget The cheapest option that still gets the job done reliably | AUCERAMIC Lower Engine Oil Pan with Drain Plug for Lexus IS/GS (RWD) |  |
| Highest Rated A top-rated pick with lots of positive feedback | Dorman 264-104 Engine Oil Pan (Replacement) |  |
| Most popular A crowd favorite that many people choose with confidence | KAX Engine Oil Pan (fits Lexus GS300 1998–2005, IS300 2001–2005) |  |
| Best Seller A high-volume bestseller chosen again and again | A-Premium Lower Engine Oil Pan with Drain Plug for Lexus GS/IS RWD |  |
1. BOXI Engine Oil Pan for Lexus GS350/GS450h/GS430/GS460 and IS250/IS350
| Manufacturer | ShangHai BOXI Auto Parts Co., Ltd. |
|---|---|
| Brand | BOXI |
| Manufacturer Part Number | BX04700087-1 |
| OEM Part Number | 12102-31030; 12102-0P010; 264-461 |
This BOXI engine oil pan replaces the factory pan on select Lexus GS and IS models and is intended as a direct-fit replacement for engine oil containment. It is sold as a single, brand-new pan and is typically used during engine service or after damage to the original pan. The listing notes compatibility with various GS300/GS350/GS430/GS450h/GS460 and IS250/IS350 model years and lists multiple equivalent part numbers for cross-reference, which helps confirm fitment. Practical benefits include a ready-to-install replacement when the original pan is cracked, dented, or leaking and the product is pretested according to the seller. Important limitations are that installation instructions are not included and professional installation is recommended, so buyers should be comfortable arranging a shop or following OEM procedures; the listing does not detail material thickness, drain plug hardware, or gasket inclusion, so verify those items before purchase.
Best for: A balanced all-round buyer who wants a cost-effective, direct-fit replacement for a damaged or leaking oil pan and who prefers a practical aftermarket option that matches factory fitment qualities.
Less Ideal for: Buyers who need a complete kit with hardware, gasket, or step-by-step installation guidance should consider dealers or kits that include those components.
- Direct-fit replacement designed for listed Lexus GS and IS model years which simplifies installation planning
- Listed cross-reference OEM part numbers for easier fit confirmation
- Sold as a new, individually tested pan so it is ready for service use
- No installation instructions or hardware are included with the listing
- Listing does not specify gasket, drain plug, or material details which may require purchasing additional parts
Verdict: A direct-fit, pretested replacement oil pan for specified Lexus GS and IS models that keeps repairs simple and practical.
2. Sawyer Auto Replacement Lower Oil Pan for Lexus IS300 IS350 RC350 RC300 LS500h GS350 IS250
| Compatible with Vehicle Type | Passenger Car, Pickup Truck |
|---|---|
| Product Grade | Replacement Part |
| Fit Type | Vehicle Specific |
| Brand Name | Sawyer Auto |
| Manufacturer Part Number | EB659451 |
This Sawyer Auto lower oil pan is a direct-fit replacement designed for the lower location on all-wheel-drive Lexus models listed, providing a factory-style installation without modification. It is intended to replace a damaged or leaking pan during routine engine work or after an impact. The listing emphasizes modern tooling and road testing, which suggests improved material durability and consistent fit compared with generic pans. Because it is vehicle-specific and labeled as a replacement grade part, installation should be straightforward using standard tools and typical undercar access. Practical benefits include restoring a proper oil seal and ease of fitment, which reduces labor time when replacing a corroded or dented original pan. Limitations are that fitment is restricted to the specified Lexus applications and the product description does not include hardware, gasket details, or thickness/specified material grades, so you may need to reuse or separately source some installation components.
Best for: Performance-oriented Lexus owners who prioritize a high-quality, direct-fit replacement to restore engine oil containment and keep downtime and installation fuss to a minimum.
Less Ideal for: Buyers looking for a low-cost universal pan, or those who need a complete installation kit with hardware and gaskets included should consider other options.
- Vehicle-specific direct-fit design for listed Lexus models simplifies installation
- Manufactured with modern tooling and road tested for consistent quality
- Replacement-grade materials claimed to be more durable than some factory units
- Restores proper oil sealing and can reduce repair labor compared with modifying a universal pan
- Product listing does not specify inclusion of gasket or hardware
- Material composition and exact thickness are not provided in the description
Verdict: A vehicle-specific, road-tested replacement lower oil pan aimed at restoring reliable fit and durability for the listed Lexus models.
3. YHTAUTO Lower Engine Oil Pan Replacement for Lexus IS250/IS350 and GS300/GS350 (AWD)
| Fitment | Lexus IS250/IS350/GS300/GS350 AWD (specified years) |
|---|---|
| Reference numbers | 12102-31040, 1210231040, TOP36A, 264-594 |
| Position | Lower engine oil pan |
This YHTAUTO lower engine oil pan replaces the factory lower pan on AWD Lexus IS250, IS350, GS300, and GS350 models from the specified years. Installed in place of a damaged or leaking factory pan, it restores engine oil containment and drain functionality. The listing highlights high-strength materials and a precise manufacturing process intended to hold up under normal driving and help maintain stable engine operation. It includes reference part numbers for correct identification and targets AWD configurations only. Practical benefits include straightforward fitment for compatible vehicles and a budget-focused alternative to dealer parts. Limitations are that fitment is restricted to AWD models and model years listed, and as an aftermarket part it may differ slightly in finish or hole placement compared with factory parts, so careful comparison before installation is advised.
Best for: Practical optimizers seeking a cost-effective, ready-to-install replacement oil pan for routine repair on the specified AWD Lexus IS/GS models who prioritize value over OEM sourcing.
Less Ideal for: Buyers who require exact factory-sourced parts, who own non-AWD versions, or who need multi-vehicle compatibility should look elsewhere.
- Made to match referenced factory part numbers for easier identification and fit checking
- Constructed from higher-strength materials intended to resist damage and maintain oil containment
- Direct replacement design for listed AWD Lexus IS and GS models to simplify installation
- Only compatible with AWD configurations and the specific model years listed
- Aftermarket finish and minor fitment variations possible compared with factory replacement pans
Verdict: A budget-focused, direct-fit lower oil pan replacement for AWD Lexus IS and GS models that restores oil containment without the dealer price.
4. AUCERAMIC Lower Engine Oil Pan with Drain Plug for Lexus IS/GS (RWD)
| Manufacturer | AUCERAMIC |
|---|---|
| Model | Lower Engine Oil Pan with Drain Plug |
| Position | Lower |
| OEM Part Number | 264-461, 12102-31030, 12102-0P010 |
This stamped steel oil pan is offered as a direct factory-replacement for RWD Lexus IS250/IS350 and several GS variants, designed to replace the factory lower oil drain pan and restore a leaking or damaged unit. It is typically used during routine oil service or when repairing damage from road debris or corroded pans. The pan is manufactured to a 1:1 ratio for OEM-style fitment, comes painted to resist surface corrosion, and includes a drain plug for normal oil changes. For budget repairs it provides a durable, no-frills solution that resists deformation and is intended to collect and retain oil flow back into the sump. Limitations are that the gasket is not included so you must source a proper seal separately, and it is for RWD configurations only so it will not fit AWD/4WD chassis. Expect a straightforward swap for mechanics and competent DIYers but plan for the extra gasket and hardware during installation.
Best for: Budget-conscious owners looking for an affordable, factory-style replacement to fix leaks or restore a damaged oil pan on older Lexus IS/GS RWD cars and who prioritize low-cost parts over premium aftermarket features.
Less Ideal for: People seeking a complete seal kit or a corrosion-proof aftermarket upgrade should consider options that include gaskets or are made from specialty materials; owners of AWD or 4WD vehicles should not choose this pan.
- Direct 1:1 replacement profile for specified Lexus IS and GS RWD models
- Stamped steel construction designed to resist deformation and impact
- Painted exterior for added corrosion resistance
- Includes drain plug for standard oil changes
- Gasket not included so a separate seal must be purchased
- Fitment limited to rear-wheel-drive models only
Verdict: A straightforward, budget-focused stamped steel replacement oil pan that restores factory-fit and function for RWD Lexus IS and GS models.
5. Dorman 264-104 Engine Oil Pan (Replacement)
| Material | Steel |
|---|---|
| Thread Size | M14x1.5 |
| Bolt Pattern (Number of Holes) | 18 |
| Exterior | Machined |
This Dorman 264-104 oil pan is a direct replacement designed to replicate factory pan fitment and serviceability for compatible engines. It is a stamped steel pan finished with a high-strength coating to resist corrosion and comes as a complete assembly including drain plugs so you can install and refill without sourcing extra parts. Typical use is straightforward: remove the old leaking or damaged pan, clean the mating surface, and bolt this pan in place using the existing bolt pattern and gasket. Buyers will appreciate the machined exterior finish and the included drain hardware that speeds a routine oil change. Some users report excellent hole alignment and fit, while other reports show occasional fitment mismatch or minor distortion on certain engines, so careful verification against your engine and gasket is wise before installation. This product is a practical, budget-conscious replacement that favors reliability and straightforward service over aftermarket performance enhancements.
Best for: Reliability-focused buyers who prioritize replacing a leaking or damaged oil pan with a factory-style, serviceable part that minimizes downtime and maintenance hassle.
Less Ideal for: Those seeking a performance or deep-sump aftermarket oil pan for modified engines or racing applications should look for purpose-built performance pans instead.
- Complete assembly with drain plugs included for immediate installation
- Stamped steel construction with high-strength coating for corrosion resistance
- Machined exterior and accurate bolt pattern for straightforward alignment
- Replacement-grade part engineered to match original pan shape and service points
- Listed as a universal fit so fitment can be inconsistent without verifying specific engine application
- Some buyers reported a warped or twisted pan that required adjustment during installation
Verdict: A practical, corrosion-resistant replacement oil pan that delivers factory-style fit and the convenience of a complete assembly for dependable repairs.
6. KAX Engine Oil Pan (fits Lexus GS300 1998–2005, IS300 2001–2005)
| Vehicle fitment | Lexus GS300 1998-2005, Lexus IS300 2001-2005 |
|---|---|
| Includes | Engine oil pan with drain plug |
| Exterior | Painted |
| Manufacturer | KAX |
This KAX engine oil pan is a direct-replacement pan for the Lexus GS300 and IS300 that collects and stores engine oil while helping dissipate heat and keep contaminants out. It arrives as a painted, thickened steel pan with a pre-installed drain plug and is intended to be installed in place of a worn or damaged pan. Typical use is a like-for-like replacement during an oil system repair or after damage from road debris. Notable features include a corrosion-resistant finish, a reinforced shell for impact resistance, and factory-quality manufacturing tolerances that aim to simplify installation. Practical benefits are straightforward fitment for the specified Lexus models, a durable construction that reduces the chance of future leaks, and an included drain plug so you can complete much of the job without sourcing extra parts. Limitations are that the gasket and any mounting hardware are not consistently included, so you will likely need to buy a correct pan gasket and possibly bolts or sealant to finish the job properly.
Best for: Buyers who prioritize convenience and want a ready-made, direct-fit replacement to get their Lexus IS300 or GS300 back on the road quickly with minimal troubleshooting.
Less Ideal for: People rebuilding an engine to factory-restoration standards or those who want an all-in-one kit with gasket and hardware included should look for a more complete package.
- Direct-fit replacement for Lexus GS300 and IS300 which simplifies installation
- Thickened, corrosion-resistant construction designed to resist impact and reduce leaks
- Includes drain plug so fluid can be removed without sourcing extra parts
- Gasket is not reliably included so a buyer must purchase the correct pan gasket separately
- Mounting bolts or installation hardware may be missing, requiring additional parts or a hardware kit
Verdict: A convenient, durable direct-fit oil pan for Lexus GS300/IS300 owners who want a quick, reliable replacement but expect to buy a separate gasket and possibly hardware.
7. A-Premium Lower Engine Oil Pan with Drain Plug for Lexus GS/IS RWD
| Material | Steel |
|---|---|
| Drain Plug | Included |
| Surface Finish | Corrosion Resistance |
| Sump Style | Wet |
This steel lower engine oil pan is a direct replacement sump for select rear-wheel-drive Lexus GS and IS models and installs in place of the factory pan to restore proper oil containment and drainage. It is intended for professional replacement and comes with a drain plug but no gasket, so installers should plan to supply a new gasket or use a compatible sealant during installation. The corrosion-resistant finish helps the pan resist road salt and grime, and the included drain plug makes oil changes straightforward. Fitment targets specific model years and engine sizes, so verifying the referenced part numbers before purchase avoids fitment issues. The pan is a practical fix for oil leaks, low oil level symptoms, or excessive consumption when the original pan is damaged or corroded. Expect a straightforward, functional replacement that requires basic mechanical skill or a shop visit and standard oil-change procedures.
Best for: Risk-averse mainstream buyers who want a reliable, factory-style replacement pan to address leaks or damage and prefer parts that restore the vehicle to stock-like function.
Less Ideal for: Buyers looking for a performance or lightweight aftermarket pan, those who need AWD compatibility, or owners wanting a complete gasket-and-hardware replacement kit.
- Corrosion-resistant steel construction improves durability compared with corroded factory pans
- Includes a drain plug for convenient oil changes without additional parts
- Direct replacement fitment for specified Lexus GS and IS RWD model years and engines
- Surface finish reduces likelihood of rust and road-salt damage over time
- Gasket is not included so a separate gasket or sealant is required at installation
- Intended for RWD models only and will not fit AWD or other variants
Verdict: A straightforward, corrosion-resistant steel replacement oil pan that restores proper oil containment for specified RWD Lexus GS and IS models.
Choosing the Right Lexus IS Oil Pan: Key Factors to Consider
Fitment Accuracy
Correct fitment ensures the pan aligns with factory bolt patterns, drain plug location, and oil pickup clearance. A pan that fits precisely minimizes the need for shims or modifications, reducing installation time and the risk of misalignment that can cause leaks or interfere with the pickup. Verify bolt hole pattern and profile to match the Lexus IS engine architecture so sealing surfaces mate evenly.
Accurate fitment also preserves ground clearance and prevents contact with crossmembers or other underbody components. When fitment is off even slightly, stress can concentrate at sealing surfaces and fasteners, increasing the chance of gasket failure or hairline leaks during thermal cycles.
Material and Corrosion Resistance
Oil pans are commonly made from stamped steel, cast aluminum, or stamped aluminum; each material has tradeoffs in strength, weight, and corrosion behavior. Steel pans can dent but are often durable and easier to repair; aluminum pans are lighter and dissipate heat well but can corrode differently and may require thicker sections to resist impact.
Look for protective finishes, coatings, or anodizing that resist road salt and chemical exposure. Corrosion resistance affects both long-term durability and the ability to remove bolts cleanly during service. A well-protected pan reduces the likelihood of leaks developing at seams or drain plug threads.
Sealing Surface and Gasket Interface
The quality and flatness of the sealing flange determine how well the pan mates with the gasket and engine block. A properly machined or flattened sealing surface distributes clamping force evenly and reduces the chance of oil seepage. Design features such as raised or recessed gasket channels can help retain the sealant or gasket and prevent extrusion under clamping load.
Consider whether the pan uses a formed gasket flange or requires a separate sealant. The ease of replacing the gasket and the availability of replacement gaskets are practical concerns for maintenance and long-term leak prevention.
Drain Plug and Serviceability
Drain plug placement, thread strength, and accessibility are central to routine oil changes. A well-designed drain plug location allows for complete draining without removing other components and reduces the risk of cross-threading or stripped threads. Some pans include magnetic drain plugs or reinforced bosses to reduce wear.
Serviceability also includes features like integrated baffles that do not impede cleaning, and designs that allow easy access to the pickup and trap oil during inspection. Consider whether the pan design makes oil changes straightforward in typical home or shop settings.
Impact Resistance and Structural Rigidity
The oil pan sits low on the vehicle and can be vulnerable to road debris and curbs. Structural rigidity reduces the risk of dents that can reduce oil capacity or contact internal components. Thicker material or reinforcing ribs can enhance impact resistance without excessive weight gain.
A pan that flexes or dents easily may also stress the sealing flange and fasteners, increasing leak potential. Evaluate the design for protective contours and reinforcement in vulnerable zones to maintain long-term sealing integrity.
Internal Baffling and Oil Control
Baffles and trap designs influence how oil is retained at high engine loads, during cornering, and on steep grades. Proper internal baffling prevents oil starvation by keeping oil around the pickup and reducing aeration. This is especially important if you plan spirited driving or towing where oil movement is more pronounced.
Consider the internal layout for ease of cleaning and whether baffles are integrated or removable. Good oil control also reduces oil foam and helps maintain consistent oil pressure, contributing to engine longevity.
How We Chose the Best Lexus IS Oil Pan
We focused on selection criteria that matter for longevity and serviceability when replacing or upgrading an oil pan on a Lexus IS. Key evaluation factors included the accuracy of fitment to factory mounting points and drain location, the material and corrosion resistance of the pan, and the integrity of sealing surfaces that interface with the gasket. We also considered seasoning for serviceability such as drain plug accessibility and any baffle or windage tray design that affects oil control under load. Manufacturing tolerances and finish were reviewed to reduce the risk of warpage or leaks after installation. Products that required extensive modification, had unclear fitment documentation, or lacked corrosion protection were excluded. The resulting list highlights options that balance correct fit, durable materials, and features that simplify installation and maintenance.
Our full evaluation process is outlined in our review methodology.
FAQ
How do I know if my Lexus IS oil pan is leaking or just a gasket issue?
Visible oil pooling under the vehicle or oil on the pan flange often indicates a leak. A gasket-related seep usually appears along the mating surface between the pan and the block, while a pan crack or puncture will show a concentrated drip or hole. Cleaning the area and inspecting after a short drive can help locate the source. If the leak is near the drain plug, check plug torque and thread condition before replacing the pan.
Can I replace the oil pan myself, or should a mechanic do it?
Many DIYers can replace an oil pan with basic tools if they have a safe way to support the vehicle and follow torque specs. Replacement involves draining oil, removing bolts in a controlled pattern, cleaning sealing surfaces, and reinstalling with correct torque. Complexities such as bent pans, corroded fasteners, or the need to drop subframes may make professional help advisable. If you are uncertain about fitment or torque procedures, consult a repair manual or a technician.
What causes an engine oil pan leak to develop over time?
Leaks often develop from degraded gaskets, corrosion of the pan material, or damage from impacts. Thermal cycling can cause gasket material to harden and shrink, while road salt and moisture accelerate corrosion. Improper installation, such as uneven bolt torque, can also create stress points that lead to leaks. Regular inspection during oil changes helps detect emerging issues early.
Is it worth choosing an aftermarket oil pan over an original-design replacement?
Aftermarket pans can offer benefits such as improved materials, reinforced drain bosses, or enhanced baffling, but quality varies. A well-made aftermarket pan that matches factory fitment and uses durable finishes can be a good option. Prioritize fit accuracy, sealing surface quality, and documented compatibility when considering aftermarket alternatives.
How important is oil pan bolt torque and where can I find the correct specification?
Correct bolt torque is critical to compress the gasket evenly and avoid warping the pan flange. Under-tightening can cause leaks, while over-tightening can damage threads or deform the sealing surface. The correct torque specification is available in the vehicle service manual or factory repair documentation for your Lexus IS and should be followed, typically using a calibrated torque wrench.
Conclusion
Selecting the right Lexus IS oil pan means balancing fitment accuracy, corrosion resistance, and serviceability. Prioritize pans that align precisely with factory mounting points, offer durable materials and protective finishes, and have drain and baffling features that match how you use the vehicle. Be mindful of tradeoffs such as weight versus impact resistance and sealing flange design versus ease of gasket replacement.
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