Automotive replacement transmission washers are crucial components for maintaining a leak-free seal during fluid changes, preventing drips and ensuring optimal transmission performance. These small but vital gaskets are designed to crush slightly upon tightening, forming a tight seal that prevents fluid loss from the drain plug. Products were evaluated based on material quality, precise compatibility, sealing performance, pack quantity, user reviews, and feature analysis.
DCWecher 20-Pack 90471-PX4-000 Transmission Fluid Drain Plug Washer Gasket
$4.99
The DCWecher 20-Pack offers a generous quantity of premium aluminum washers, backed by a 'trusted brand' claim for reliable sealing.
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Transmission Fluid Drain Plug Crush Washer for Honda Accord Acura Civic Ridgeline Odyssey CRV CR-V Pilot Fit Element, Replacement for The Part # 90471PX4000 90471-PX4-000, Pack of 10 pcs
$6.99
The AOIT 10-pack provides essential 18mm crush washers with 'excellent sealing performance' at a practical quantity for routine maintenance.
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12pc Transmission Diff Drain Washer 18mm 20mm Replacement for Honda/Acura
$7.95
AUTOMAJOR offers a comprehensive 12-piece kit with both 18mm and 20mm washers, emphasizing 'premium quality' materials and a 'secure fit' for diverse needs.
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- Honda and Acura run three washer sizes and they do not interchange. 14 mm, number 94109-14000, is the engine oil drain plug. 18 mm, number 90471-PX4-000, is this one and it seals the transmission pan drain plug. 20 mm, number 94109-20000, sits on the...
- This is the transmission pan washer. Honda catalogues it as drain plug washer, with plug washer and transmission pan washer as its other names, and it crosses to 16955. Fifteen to a pack, which covers fifteen fluid services — more than most cars see in...
- Measured size is 18.2 mm inner by 25.8 mm outer by 1.9 mm thick, or 0.72 in by 1.02 in by 0.075 in. The material is soft aluminum, and that is the point rather than a shortcoming: a crush washer is meant to deform. It flows into the machining marks on the...
- Fits Honda Accord and Accord Hybrid, Civic and Civic Hybrid, CR-V and CR-V Hybrid, CR-Z, Clarity, Crosstour, Del Sol, Element, Fit and Fit EV, HR-V, Insight, Odyssey, Passport, Pilot, Prelude and Ridgeline, and the Acura models built alongside them. No...
- Six of each size so you do not have to work out which one your car takes before you order. Honda and Acura use both an 18 mm and a 20 mm washer across the same model names, and which one is on your car depends on the gearbox and the drivetrain rather than...
- Where each size sits, and why the lists overlap. The 20 mm washer 94109-20000 seals the transmission drain plug on front wheel drive cars — on a 2022 Civic with the CVT it sits in the AT transmission case group of the parts diagram — and moves to the...
- Neither size goes on the engine. The engine oil drain plug on Honda and Acura takes the 14 mm washer, Honda number 94109-14000, and that is a separate AUTOMAJOR listing. If you are under the car for an oil change rather than a fluid service on the gearbox...
- The 18 mm is Honda 90471-PX4-000, catalogued as drain plug washer and transmission pan washer, crossing to 16955, measuring 18.2 mm inner by 25.8 mm outer by 1.9 mm thick. The 20 mm is Honda 94109-20000, which supersedes 90413-551-000, measuring 20.2 mm...
- 20-PACK 90471-PX4-000 SET — Includes 20 aluminum transmission fluid drain plug washer gasket pieces for selected Honda Acura service, replacing worn washers during fluid changes
- 18MM ALUMINUM CRUSH WASHER — Made for a matching 18mm drain plug position, this aluminum crush washer supports a close fit under the transmission fluid or oil drain plug
- PART NUMBER REFERENCE — Designed around 90471-PX4-000 and 90471PX4000 reference numbers; compare your current washer, drain plug size, and vehicle fitment before ordering
- SELECTED HONDA ACURA FITMENT — Commonly searched for selected Accord, Civic, CR-V, Pilot, Odyssey, Ridgeline, Fit, Element, Integra, TLX, and MDX maintenance jobs
- WIDE COMPATIBILITY: Crush washer for transmission fluid and rear differential oil drain plug is compatible with including, but not limited to Accord Civic Clarity Crosstour CR-V CR-Z DelSol HR-V Element Fit Insight Odyssey Prelude Pilot Passport Ridgeline...
- CERTIFIED OEM: 90471-PX4-000 & 94109-20000. 18mm and 20mm oil drain plug washer are designed to exact fit.
- HIGH QUALITY: High quality Aluminum material, which have smooth surface, our oil drain plug washer fits snug and boast a much longer lasting sealing capabilities.
- DIMESIONS: 90471-PX4-000: ID is 18mm inner diameter, OD is 25.5mm outer diameter, and 2mm thickness. 94109-2000: ID is 24mm inner diameter, OD is 32mm outer diameter, and 1mm thickness.
- 【Seamless Substitution】Upgrade your automotive transmission effortlessly! Our crush washer oil drain plug gaskets perfectly replace your Hon da OEM washer. Ideal for transmission fluid changes, these drain plug crush washers directly replace...
- 【Wide Compatibility】Our transmission fluid drain plug crush washers offer wide-ranging compatibility with Hon da/Acura models, such as CR-V, CR-Z, Civic, Crosstour, Del Sol Coupe, Element, Fit, HR-V, Insight, Odyssey, Passport, Pilot, Prelude...
- 【Excellent Sealing Performance】No more oil drips! Our oil plug gaskets offer a secure and leak-free fit. With a snug and flush design, these oil drain plug gaskets outperform plastic or rubber seals, protecting your engine. Upgrade today for...
- 【Premium Quality Material】Experience unmatched durability and performance with our oil plug crush washers, meticulously crafted from premium aluminum. Engineered to withstand high temperatures, eliminate oil degradation, and combat corrosion, our oil...
- Reliable Honda Replacement: Mission Automotive's transmission fluid drain plug washer is a dependable replacement part compatible with Honda OEM washers. It is designed to deliver a tight seal and prevent leaks during transmission fluid changes
- Durable Quality Materials: Crafted from quality materials, our transmission fluid drain plug crush washer ensures long-lasting performance. Engineered for a precise fit, it promises durability and reliability for automotive replacement tasks
- Universal Fit Compatibility: This oil drain plug crush washer is compatible with Honda models including Accord, Civic, and CR-V. Its versatility makes it an essential automotive replacement part for various vehicles and maintenance needs
- Precise Dimensions: The transmission fluid washer features an outside diameter of 25.5 mm, inside diameter of 18 mm, and thickness of 1.95 mm. These precise measurements ensure a perfect fit as a transmission plug washer for diverse applications
- 1. Complete 24-Piece Kit — Includes 24 pcs of 90471-PX4-000 transmission oil drain plug crush washers, enough for multiple fluid changes.
- 2. Precision Dimensions — 25.5 mm outer diameter, 18 mm inner diameter, 2 mm thickness for a snug, leak-free seal on the drain plug.
- 3. Broad Honda Fitment — Compatible with Accord, Civic, CR-V, Odyssey, Pilot, Fit, Element and select Acura models; verify fitment for your vehicle.
- 4. Durable Aluminum Build — Corrosion-resistant aluminum material holds up under high heat and repeated use, protecting your drain plug threads.
- Aluminum alloy automatic transmission fluid drain plug crush washer seal.
- Ensuring proper fit with the drain plug and creating a tight seal.
- Good for oil changes and oil filter replacements.
- This oil drain plug crush gasket washers is for most of car.
- Factory replacement automatic transmission drain plug washers, 5 pack
- Fits all Honda automatic transmission drain plugs
- Fits all Pilot and Ridgeline rear differential drain plugs
- Direct replacement for Toyota OEM 35178-30010 (3517830010). Cross-references with 35178-02010 (3517802010), 35178-50010 (3517850010), and 90341-10078 (9034110078). Dimensions: 12mm / 0.47in ID, 18mm / 0.71in OD, 1.5mm / 0.06in thickness. 15-pack...
- Important: this is the transmission drain plug crush washer (35178-30010) — different from the engine oil drain plug washer (90430-12031) which has a 21mm OD. Toyota uses different size washers for different drain points. Always verify your OEM washer...
- Made from steel matching the original Toyota factory specification. Steel crush washers compress under torque to fill microscopic surface imperfections between the drain plug and transmission case, creating a tight, leak-free seal. Compatible with Toyota...
- Crush washers are single-use components — Toyota recommends replacing the gasket at every transmission fluid service. Reusing an old crush washer is one of the most common causes of transmission fluid leaks after service. A fresh washer gives a proper...
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How to Choose the Best Automotive Replacement Transmission Washers
Material Quality and Durability
The longevity and effectiveness of an automotive replacement transmission washer are fundamentally tied to its material composition. Most commonly, these washers are crafted from aluminum, which is designed to deform slightly under torque, creating a positive seal. Brands like DCWecher and BSAMZO explicitly highlight their use of 'premium aluminum' or 'high quality Aluminum material,' suggesting a focus on consistent crush properties and resistance to corrosion. While aluminum is standard, some products, such as AUTOMAJOR, mention 'high grade rubber seal' in their descriptions, though the primary crush washer material for drain plugs is typically metal. The main difference is how well the material maintains its integrity over time and under varying temperatures, ensuring repeated reliable sealing performance when replaced.
Compatibility and Exact Sizing
Selecting the correct size and ensuring compatibility with your vehicle's OEM specifications is paramount. Transmission fluid drain plugs often require specific washer dimensions, with 18mm and 20mm being common sizes referenced across many Honda and Acura models. For instance, the DCWecher and Mission Automotive washers are 18mm, specifically replacing OEM part number 90471-PX4-000. However, some vehicles, or even different drain plugs on the same vehicle (e.g., rear differential), might require a 20mm washer, corresponding to OEM part number 94109-20000. Products like BSAMZO and AUTOMAJOR offer convenience by including both 18mm and 20mm washers in their kits, catering to a wider range of service needs and ensuring 'wide compatibility' as claimed. Always cross-reference the required OEM part number to guarantee a 'secure fit' and prevent leaks.
Pack Quantity and Kit Options
The quantity of washers in a pack should align with your maintenance frequency and the number of vehicles you service. For a single vehicle owner performing annual transmission fluid changes, a 10-pack from AOIT might be sufficient, offering several years of replacements. However, for those with multiple vehicles or who prefer to have spares readily available, larger packs like the 20-pack from DCWecher or Mission Automotive offer better value over time. Furthermore, some products, such as BSAMZO and AUTOMAJOR, go beyond single-size packs by offering kits that combine both 18mm and 20mm washers. These comprehensive kits are particularly useful for vehicles that require different washer sizes for the transmission and rear differential, streamlining the purchasing process and ensuring all necessary components are on hand for a complete fluid service.
Pros & Cons
DCWecher 20-Pack 90471-PX4-000 Transmission Fluid Drain Plug Washer Gasket
Pros
- Explicitly states 'PREMIUM MATERIALS' (aluminum) for reliable sealing.
- Advertised as a 'TRUSTED BRAND' in specialty auto parts.
- Generous 20-pack quantity provides multiple replacements.
- Meticulously crafted for a 'SECURE FIT' as per description.
Cons
- Only includes 18mm washers, limiting use to specific drain plugs.
- Does not explicitly mention compatibility with rear differential drain plugs.
Mission Automotive Mission Transmission Washer Drain Plug Seal Gaskets - 25.5mm OD x 18mm ID x 1.95mm Thick, 20-Pack - Compatible with Honda & Acura Models
Pros
- Labeled as 'Reliable Honda Replacement' indicating specific vehicle focus.
- Crafted from 'Durable Quality Materials' for long-lasting use.
- Offers a 20-pack, providing good value and multiple uses.
- Claims 'Universal Fit Compatibility' for various Honda & Acura models.
Cons
- Material quality description ('quality materials') is less specific than 'premium aluminum'.
- Only supplies 18mm washers, potentially requiring a separate purchase for 20mm needs.
6pcs Transmission Fluid & 6pcs Rear Differential Oil Drain Plug Washer Gasket Seal - 20mm+18mm Replacement for Honda Acura Civic Accord Odyssey CRV Pilot Fit, OEM PN Part# 94109-2000 & 90471-PX4-000
Pros
- Offers 'WIDE COMPATIBILITY' by including both 18mm and 20mm washers.
- Claims 'CERTIFIED OEM' for specified part numbers 90471-PX4-000 & 94109-20000.
- Made from 'High quality Aluminum material' with a smooth surface.
- Includes washers for both transmission fluid and rear differential oil drain plugs.
Cons
- Pack quantity (6pcs of each size) is smaller compared to 20-packs from other brands.
- Durability claims are general ('high quality Aluminum') rather than specific performance metrics.
Common Mistakes to Avoid
Incorrect Size Selection for Drain Plugs
A common pitfall is assuming all drain plugs on a vehicle use the same size washer. While many Honda and Acura transmissions utilize an 18mm washer (like those offered by DCWecher and Mission Automotive, replacing 90471-PX4-000), the rear differential often requires a 20mm washer (OEM PN 94109-20000). Failing to verify the correct size, especially when servicing multiple fluid types, can lead to leaks or an improper seal. Kits from BSAMZO and AUTOMAJOR mitigate this by providing both 18mm and 20mm options.
Overlooking OEM Part Number Specificity
Relying solely on visual inspection or generic 'fits Honda' claims can be misleading. Automotive replacement transmission washers are designed to precise OEM specifications. For instance, the 90471-PX4-000 part number is consistently referenced by brands like DCWecher and AOIT for 18mm transmission drain plugs. Similarly, BSAMZO and AUTOMAJOR specifically list both 90471-PX4-000 and 94109-20000. Neglecting to cross-reference the exact OEM part number for your specific vehicle and drain plug can result in a washer that is either too thick, too thin, or incorrectly sized, compromising the seal.
Assuming One Washer Type for All Fluid Changes
Many vehicle owners might mistakenly believe a single type of washer will suffice for all fluid changes. However, as seen with products from BSAMZO and AUTOMAJOR, specific washers are often designated for 'Transmission Fluid' and 'Rear Differential Oil Drain Plug.' These different applications can sometimes imply slightly different material properties or crush characteristics for optimal sealing in their respective environments. Using a washer intended for a transmission fluid drain on a differential, or vice-versa, without confirming compatibility, can lead to sub-optimal sealing performance and potential leaks.
