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When your Acura TSX transmission pan needs replacement, selecting the right pan matters for durability and ease of maintenance. The wrong pan can complicate fluid changes, make leak repair harder, or fail to seat properly against the transmission case. This guide shortlists the top options for the Acura TSX and explains the tradeoffs you should consider.We evaluated pans for fit, construction, and serviceability to surface the best candidates. Read on to see the top picks and learn which features matter most when replacing or upgrading the transmission pan.
Looking for other parts? See all Acura TSX parts & accessories.
Top Picks at a Glance
| Best Overall The best all-around choice for most situations | Dorman 265-809 Transmission Oil Pan (Direct Replacement) |  |
| Best Quality Built to a higher standard if you want something more solid | Dorman Transmission Oil Pan 265-810 |  |
| Best Value The sweet spot between price and what you get | Racing Power R8491 Polished Aluminum Transmission Pan |  |
| Best Budget The cheapest option that still gets the job done reliably | Dorman Transmission Oil Pan 265-909 |  |
| Highest Rated A top-rated pick with lots of positive feedback | Dorman 265-866 Transmission Oil Pan |  |
| Most Popular A crowd favorite that many people choose with confidence | X AUTOHAUX Transmission Filter Oil Pan Strainer Assembly (25420-RXH-003) |  |
1. Dorman 265-809 Transmission Oil Pan (Direct Replacement)
| Material | Steel |
|---|---|
| Included Components | Transmission Pan |
| Part Number | 265-809 |
| Item Form | Oil |
This Dorman transmission oil pan is a direct replacement designed to fit the indicated applications and provides a serviceable drain plug that simplifies routine transmission fluid changes. For an Acura TSX (confirm year and trim before buying), the steel construction and factory-style mounting holes aim to deliver a leak-free fit when installed correctly. The built-in drain plug makes draining and refilling much cleaner compared with removing the entire pan, and the pan includes a designated pocket for relocating the factory magnet. Installation is typical for transmission pan replacement and requires proper gasket sealing and torque on fasteners to avoid leaks. Some users note the drain plug may need a new crush washer to stop seepage and the pan’s stamped steel feels thinner than some factory pans, so careful handling during installation is advised. Overall this pan is practical for owners wanting an affordable, service-friendly replacement that keeps the TSX’s transmission accessible for maintenance.
Best for: Balanced, practical Acura TSX owners who value straightforward maintenance and want a budget-friendly, serviceable replacement that makes fluid changes easier.
Less Ideal for: Drivers seeking heavy-duty upgraded pans for off-road or high-performance use should consider reinforced or aluminum aftermarket options instead.
- Direct replacement fit designed to match factory mounting locations
- Steel construction for durable, leak-resistant service
- Factory-style drain plug added for cleaner, faster fluid changes
- Includes area to reinstall the transmission magnet for debris capture
- Drain plug has occasional sealing issues that may require replacing the washer
- Stamped steel may be thinner than some factory pans which could dent if impacted
Verdict: A practical, factory-style replacement pan for the Acura TSX that adds a serviceable drain plug to simplify transmission fluid maintenance.
2. Dorman Transmission Oil Pan 265-810
| Material | Steel |
|---|---|
| Finish Type | Enamel |
| Capacity | 5.3 Liters |
| Included Components | Transmission Pan |
This Dorman transmission oil pan is a direct replacement designed to bolt in where the original pan did, providing a durable steel option for transmission servicing. Typical use is to replace a damaged or leaking pan during a fluid change or transmission repair; it includes the drain plug and aligns with factory bolt patterns so installation is straightforward for a competent DIYer or shop. Notable features from the listing include steel construction with an enamel finish, try-on testing for fit, and a factory-style layout that preserves original clearances. Practical benefits include easier fluid changes thanks to the drain plug and a clean, corrosion-resistant finish that restores undercar appearance. Limitations noted by some users are a slightly thinner gauge than some factory pans and reports of a low-quality drain plug seal on a minority of units, which may prompt replacing the plug or seal during installation for reassurance.
Best for: Performance-oriented owners who prioritize restoring factory fit and reliable serviceability and who perform regular transmission maintenance or upgrades to keep a TSX drivetrain in top condition.
Less Ideal for: Buyers seeking a heavy-duty or high-capacity aftermarket pan for racing or extreme towing should consider purpose-built performance pans instead.
- Direct-fit replacement designed to match factory bolt pattern for straightforward installation
- Steel construction with enamel finish offers durability and corrosion resistance
- Includes a drain plug to simplify transmission fluid changes
- Try-on tested to verify fitment and reduce installation surprises
- Some users report the pan material is marginally thinner than original factory pans
- A few reviews mention the supplied drain plug seal may leak and might need replacement
Verdict: A durable, try-on tested steel replacement pan that restores factory fit and makes transmission fluid changes easier.
3. Racing Power R8491 Polished Aluminum Transmission Pan
| Part Number | R8491 |
|---|---|
| Country of Origin | Taiwan, Province Of China |
This Racing Power R8491 transmission pan is a polished aluminum replacement intended to bolt in place of the factory pan on the Acura TSX for routine service and modest performance gains. It lowers fluid temperature slightly thanks to the aluminum construction and greater surface area, which can help transmission longevity during spirited driving or towing. Installation is straightforward for a competent DIYer or a shop because it follows factory bolt pattern and mounting points. The polished finish looks cleaner than the stamped steel pan and resists corrosion better than untreated metals. Limitations are its basic design: there is no integrated magnetic drain plug or removable filter and the product does not include detailed gasket hardware, so expect to buy a proper pan gasket and transmission fluid separately. Also, aluminum pans can be more prone to damage from road impacts than heavier stamped or reinforced pans, so careful installation and clearance checks are recommended.
Best for: A practical optimizer who wants a cost-effective, factory-fit pan that improves cooling and appearance without a full performance overhaul; ideal for TSX owners who perform regular fluid service themselves.
Less Ideal for: Not suitable for drivers needing heavy-duty protection from off-road impacts or those who want an integrated filter or drain system built into the pan.
- Polished aluminum improves heat dissipation compared with standard steel pans.
- Factory-fit bolt pattern simplifies installation on the Acura TSX.
- Corrosion-resistant finish keeps the underside cleaner and more presentable.
- Lightweight construction reduces added mass compared with heavy aftermarket pans.
- No integrated magnetic drain plug or removable filter included.
- Gasket and hardware are not provided, requiring separate purchases.
Verdict: A budget-friendly, factory-fit polished aluminum pan that lowers transmission temperatures and cleans up the underside but requires separate gasket hardware and lacks integrated drain or filter features.
4. Dorman Transmission Oil Pan 265-909
| Manufacturer | Dorman Products |
|---|---|
| Model | 265-909 |
| Exterior | Ready To Paint If Needed |
| Manufacturer Part Number | 265-909 |
| OEM Part Number | 24237274; 24239199; 24240937; 24265264 |
This Dorman transmission oil pan replaces a damaged factory pan and is intended for routine transmission repairs where the original pan is corroded or cracked. It installs in place of the factory part and is used when changing fluid or replacing a leaking pan during a transmission service. Notable features include a ready-to-paint exterior, manufacturer part number reference, and claimed try-on testing for fit. For a budget-focused repair this pan provides a cost-effective way to restore a leak-free seal and resume normal service without the higher cost of a dealer part. Buyers should note this is an aftermarket replacement rather than a factory-sourced unit, so finish and long-term corrosion resistance may differ from higher-end pans. Confirming exact trim fitment before purchase is important because compatibility varies by vehicle and model year. The pan is best for straightforward pan replacement jobs and routine maintenance where affordability and correct fit are the priority.
Best for: Budget-conscious owners looking to repair a leaking or damaged transmission pan without dealer prices and who prioritize an affordable, functional replacement.
Less Ideal for: Owners seeking an exact factory-finished or long-term corrosion-resistant premium pan should consider higher-end or dealer-sourced options instead.
- Direct replacement designed to match factory fit and mounting locations
- Ready-to-paint exterior for a cleaner appearance after installation
- Try-on tested to improve chances of accurate fitment
- Includes manufacturer part references to simplify vehicle matching
- Aftermarket construction may not match factory corrosion resistance or finish
- Not specific to Acura TSX; must confirm vehicle compatibility before buying
Verdict: A cost-effective, direct-fit aftermarket transmission pan intended to restore leak-free service at a budget-friendly price.
5. Dorman 265-866 Transmission Oil Pan
| Material | Steel |
|---|---|
| Included Components | Transmission Pan |
| Item Type Name | Automatic Transmission Oil Pan |
This Dorman transmission oil pan is a straightforward, steel direct-replacement intended to restore a damaged factory pan on an Acura TSX. It installs in place of the original pan to contain transmission fluid and maintain the correct fit and sealing surface; Dorman notes try-on testing to confirm fit. Typical use is a service or repair where the stock pan is dented or leaking, and the part is useful for DIY mechanics and shops that want a durable factory-quality replacement. Notable features include stamped steel construction and a factory-style drain plug which makes fluid changes easier than pans without a plug. Practical benefits are durability compared with thin factory pans and a confident fit for a trouble-free replacement. Important limitations are that drain-plug design and sealing can be finicky for frequent servicing and some installers report needing extra torque or a different washer to stop leaks; if you plan repeated fluid swaps you may want to fit a sturdier drain bolt or washer. Fit confirmation for your TSX should still be checked before installation.
Best for: Reliability-focused TSX owners and independent technicians who prioritize a durable, factory-quality replacement pan to stop leaks and avoid repeat repairs.
Less Ideal for: Buyers seeking an upgraded performance cooler or long-run repeat-service solution without modifying the drain hardware should consider aftermarket pans with improved drain fittings or external coolers instead.
- Stamped steel construction offers stronger, more durable replacement compared with many thin factory pans
- Direct-replacement design and try-on testing intended to match factory fit and sealing surface
- Includes a drain plug to simplify transmission fluid changes
- Carries a limited lifetime warranty from the manufacturer
- Drain-plug sealing can require high torque or a different washer to stop leaks
- Some users report the drain bolt design is awkward relative to exhaust routing which can complicate servicing
Verdict: A durable, factory-style steel replacement pan that restores leak-free service for a TSX when the original pan is damaged.
6. X AUTOHAUX Transmission Filter Oil Pan Strainer Assembly (25420-RXH-003)
| Model | Oil Filter Kit |
|---|---|
| Manufacturer | X AUTOHAUX |
| Position | Bottom |
| Compatible OE Number | 25420-RXH-003 |
This X AUTOHAUX transmission filter and oil pan strainer assembly replaces the factory filter on compatible Acura TSX and ILX models and is used when servicing the transmission pan. The kit combines a metal/plastic filter element and pan assembly designed to trap contaminants and keep valve bodies and passages clear, which helps maintain shifting performance and prolong transmission life. It is a direct-replacement style fitment that requires dropping the pan, removing the old filter, installing the unit and resealing the pan with a gasket. The construction is described as corrosion and heat resistant, and the filter hole and mounting dimensions match the listed OE reference for straightforward installation. Limitations include that this is a nonfactory aftermarket part and may require careful gasket sealing and professional installation for vehicles with complex pan designs. Buyers should verify fitment to their exact year and engine before purchase to avoid fitment or alignment issues.
Best for: Convenience-driven owners who want an affordable, ready-made replacement that simplifies a transmission pan service and reduces parts-sourcing hassle.
Less Ideal for: Owners seeking an exact factory part or long-term OEM-style warranty coverage should consider manufacturer or dealer-sourced options instead.
- Direct-replacement design matching OE reference for Acura fitment
- Metal and plastic construction intended for corrosion and heat resistance
- Integrates filter and pan strainer so the transmission fluid is filtered during service
- Aftermarket nonfactory part so materials and long-term durability may differ from factory parts
Verdict: A convenient, direct-replacement transmission filter and oil pan assembly for Acura TSX/ILX owners needing a straightforward pan service solution.
Choosing the Right Acura TSX Transmission Pan: Key Factors to Consider
Fit and Bolt Pattern
Accurate fit and correct bolt pattern are essential because the pan must seal evenly against the transmission case. A mismatched pan can cause uneven gasket compression, which often leads to leaks and additional labor to correct. When a pan is designed specifically for the Acura TSX, bolt holes, drain locations, and clearances for nearby components line up precisely, reducing installation time and the need for modifications.
Poor fit can also affect sensor access and pan clearance for suspension or exhaust components. Choosing a pan with manufacturer-verified fitment minimizes the chance of interference and ensures the gasket seats properly for a reliable seal.
Material and Construction
Pan material influences durability, corrosion resistance, and weight. Steel pans are robust and handle impacts well, but they may corrode over time if not properly treated. Aluminum pans resist rust and often dissipate heat better, which can help lower transmission fluid temperature, but they may be more susceptible to denting under heavy road debris.
Construction quality matters too: look for pans with uniform flanges, finished mating surfaces, and reinforcements in high-stress areas. A well-made pan reduces the risk of warping and helps maintain a consistent seal throughout temperature cycles.
Drain and Service Features
Built-in drain plugs or magnetic drain designs greatly simplify routine transmission fluid changes and reduce mess. A drain plug allows you to remove fluid without fully dropping the pan, saving time and minimizing spillage. Magnetic plugs or integrated magnets in the pan base capture fine metal particles, offering an early indicator of internal wear and helping to keep fluid cleaner between services.
Consider the location and accessibility of the drain so you can use it with available tools and under-car clearances. Pans that facilitate easier drainage make regular maintenance faster and cleaner.
Gasket Interface and Seal Design
The pan-to-case interface and gasket design determine how well the assembly resists leaks. Some pans use flat flanges that require a separate gasket, while others have integrated sealing features or use pre-applied sealants. The choice affects installation technique and the likelihood of a leak if not installed correctly.
Ensure the gasket style is compatible with the transmission case and that torque specifications for bolts are followed to avoid over-compression or uneven sealing. A reliable sealing system reduces the need for rework and helps maintain fluid integrity.
Capacity and Drainback
Pan capacity affects the total volume of fluid in the system after a fluid change. Larger pans hold more fluid and can slightly alter fluid change processes and fill levels, so be aware of capacity differences when servicing. Drainback characteristics also matter: some pans trap more fluid when removed, which can make swaps messier and extend service time.
If you plan to do frequent fluid service, choose a pan that balances capacity with convenient drainback behavior to streamline maintenance.
Corrosion Protection and Finish
Surface treatments and coatings protect the pan from rust and environmental damage. Pans with proper coatings, anodizing, or powder-coated finishes tend to last longer in climates with road salt or high humidity. Corrosion can eventually lead to leaks or weakened structural integrity, so a durable finish is a practical investment.
Inspect the finish for complete coverage on seams and flange areas. Long-term protection reduces the chance of unexpected failure and keeps the pan looking and performing well over time.
How We Chose the Best Acura TSX Transmission Pan
Our selection process focused on criteria that affect long-term performance and day-to-day serviceability for the Acura TSX. We prioritized precise fit and bolt hole alignment to ensure proper sealing and reduce the risk of transmission pan leaks. Material and construction were assessed to determine resistance to corrosion and impact, since pans that resist dents and rust last longer in varied driving conditions. Drain and service features were considered, including the presence and design of drain plugs or magnetic plugs to simplify fluid changes and capture metal debris. We also evaluated gasket interface design and compatibility with common transmission pan gaskets to help ensure a secure seal. Ease of installation and accessible bolt patterns were included, since straightforward fitment reduces installation errors. We excluded pans that lack clear fitment information for the Acura TSX, incomplete hardware kits, or pans with unspecified materials. The result is a shortlist that balances fit, durability, and serviceability for this vehicle.
Our full evaluation process is outlined in our review methodology.
FAQ
How do I know if my Acura TSX transmission pan is leaking?
Look for fluid pooling under the vehicle after it has been parked and for wetness around the pan flange or drain plug. Transmission fluid is usually reddish when new and darker when older. Also check for low fluid levels or transmission performance changes, which can indicate a leak. If you find fluid, inspect the pan bolts, gasket surface, and drain plug for loose hardware or damaged seals.
Can I drop the transmission pan myself for a fluid change?
Dropping the pan for a fluid change is a common DIY task but depends on your comfort level and tools. Use proper supports and safety precautions, and be prepared for fluid to drain quickly when the pan is loosened. Have a catch container ready and follow the vehicle-specific procedure for bolt removal and torque. If you are unsure about torque specs or gasket installation, consult a repair manual or a professional.
Should I use a new gasket when replacing the transmission pan?
Yes, replacing the gasket is recommended whenever the pan is removed to ensure a reliable seal. Old gaskets can become brittle, compressed, or damaged during removal. Select a gasket type that matches the pan's flange design and follow proper torque patterns to avoid over-compressing the seal.
Do transmission pans come with drain plugs or magnets?
Many replacement pans include drain plugs and some include magnetic elements or magnetic drain plugs to capture metal particles. These features can simplify maintenance and provide early indication of internal wear. Check the product details to confirm whether a pan has these service-friendly features before purchasing.
How tight should the transmission pan bolts be torqued?
Bolt torque varies by vehicle and pan type, and it is best to follow the Acura TSX-specific torque specs from a repair manual. Typically, bolts are tightened in a crisscross pattern to an even, moderate torque to avoid flange distortion. Over-tightening can warp the pan or crush the gasket, while under-tightening can lead to leaks.
Will an aftermarket pan affect transmission cooling?
Aftermarket pans can influence cooling depending on material, thickness, and internal surface area. Aluminum pans often dissipate heat better than steel, while deeper pans may increase fluid capacity and thermal mass. However, results vary by design, so consider the construction and intended purpose when selecting a pan.
Conclusion
Choosing the right transmission pan for an Acura TSX means balancing fit, durability, and serviceability. Prioritize pans that precisely match the bolt pattern and offer reliable sealing features to minimize leaks and installation issues. Consider service-friendly attributes such as drain plugs and magnetic elements if you plan to perform regular fluid maintenance.Remember that material and finish affect long-term durability and cooling, while gasket style and torque procedures determine sealing reliability. Keep these tradeoffs in mind to pick a pan that meets your maintenance routine and longevity expectations.
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