When servicing the engine oil on a Honda, it is important to use the correct oil drain plug washer size. Most Hondas use a crush washer between the oil drain plug head and the oil pan.
The purpose of the crush washer is to seal the plug and prevent oil leaks. These washers are usually single‑use, they deform during tightening and should be replaced at every oil change.
Honda Oil Drain Plug Washer Size
| Model | Years | Washer Inner Diameter (mm) | Washer Outer Diameter (mm) |
|---|---|---|---|
| Civic (all trims) | 1996–present | 14 | 20 |
| Civic Hybrid | 2003–present | 14 | 20 |
| Accord 4‑cyl | 1990–present | 14 | 20 |
| Accord V6 | 1998–2017 | 14 | 20 |
| CR‑V 2.0/2.4 | 1997–present | 14 | 20 |
| CR‑V 1.5 Turbo | 2017–present | 14 | 20 |
| Fit / Jazz | 2001–present | 14 | 20 |
| HR‑V | 1999–present | 14 | 20 |
| Odyssey | 1995–present | 14 | 20 |
| Pilot | 2003–present | 14 | 20 |
| Ridgeline | 2006–present | 14 | 20 |
| S2000 | 2000–2009 | 14 | 20 |
| Insight | 2000–2014 | 14 | 20 |
| Prelude | 1992–2001 | 14 | 20 |
| Element | 2003–2011 | 14 | 20 |
| Crosstour | 2010–2015 | 14 | 20 |
| Passport | 1994–2002, 2019–present | 14 | 20 |
| Integra | 1986–2001, 2023–present | 14 | 20 |
| NSX (first generation) | 1991–2005 | 14 | 20 |
| NSX (second generation) | 2016–2022 | 14 | 20 |
| Accord Hybrid | 2014–present | 14 | 20 |
| Civic Si | 1999–present | 14 | 20 |
| CR‑Z | 2010–2016 | 14 | 20 |
| Clarity | 2017–2021 | 14 | 20 |
| Odyssey Hybrid | 2020–present | 14 | 20 |
| Accord Plug‑in Hybrid | 2018–2022 | 14 | 20 |
| Civic (early models) | 1973–1995 | 14 | 20 |
| Accord (early models) | 1976–1989 | 14 | 20 |
| CR-X / Civic del Sol | 1984–1997 | 14 | 20 |
| Legend | 1985–2012 | 14 | 20 |
| Vigor | 1981–1995 | 14 | 20 |
| City | 1981–present | 14 | 20 |
| Stepwgn | 1996–present | 14 | 20 |
| Stream | 2000–2014 | 14 | 20 |
| Freed | 2008–present | 14 | 20 |
| Brio | 2011–present | 14 | 20 |
| Amaze | 2013–present | 14 | 20 |
| BR-V | 2016–present | 14 | 20 |
| Mobilio | 2001–present | 14 | 20 |
| Honda e | 2019–present | 14 | 20 |
| ZR-V | 2022–present | 14 | 20 |
| Elevate | 2023–present | 14 | 20 |
Related Oil Drain Plug Size Chart(For Makes & Models 2026)
Explanation of the Table
Washer Inner Diameter (ID)
The inner diameter is the opening of the washer through which the drain plug passes. For most Honda passenger vehicles across nearly all model years, this inner diameter is 14 millimeters. This size corresponds with the common Honda oil drain plug thread.
Washer Outer Diameter (OD)
The outer diameter is the outside edge of the washer that contacts the oil pan surface. Most Honda oil drain plug washers have an outer diameter of 20 millimeters. This size ensures proper sealing on aluminum or steel oil pans.
Related Honda Civic Oil Drain Plug Size(For All Generations)
Why Honda Uses the Same Washer Size Across Many Models
Honda designs many of its engines and oil drain systems with standardization in mind. Across compact cars, sedans, crossovers, and even some light trucks, the oil drain plug thread and sealing washer size remain consistent. This simplifies parts cataloging and maintenance practices for both owners and service facilities.
Even when Honda introduces new engines or updates existing ones, the oil drain plug and washer size tend to stay the same for passenger car and crossover applications. This is why the table shows the same inner and outer diameters for most models and engines.
Washer Material
Honda oil drain plug washers are typically made of soft metal such as aluminum or a copper alloy. These metals deform slightly under torque to create a tight seal.
Because they are crush washers, they are not meant to be reused. Reusing a crushed washer can lead to leaks or improper sealing.
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How to Identify the Correct Washer
When servicing your Honda, make sure the washer:
- Matches the 14 mm inner diameter that fits the drain plug,
- Has an outer diameter that sits flush on the oil pan surface,
- It is made of new metal and has not previously been deformed.
You can confirm the correct washer size by:
- Checking the vehicle’s service manual,
- Physically measuring the old washer,
- Verifying with official Honda parts listings.
Installation Tips
- Always replace the washer during an oil change.
- Torque the drain plug to the manufacturer’s specification. Over‑tightening can strip the oil pan threads, and under‑tightening can cause leaks.
- Clean the drain plug and oil pan surface before installing a new washer.
- Check for leaks after starting the engine and letting it idle for a few minutes.
Related Oil Drain Plug Torque Chart(For ALL Car Models)
Exceptions and Special Cases
While the vast majority of Honda cars use the 14 mm inner diameter washer listed above, some exceptions include:
- Transmission drain and fill plugs: These often use different washers and sizes specific to the transmission or differential.
- Motorcycle or small engine applications: Not covered in this table, as motorcycle engines and small equipment can have different sizes unrelated to automotive standards.
For those special cases, consult the specific service manual or parts catalog for your engine.
Final words
Honda’s use of a standardized oil drain plug washer size across most models and years simplifies maintenance for owners and mechanics. The table above provides a clear reference for the washer inner and outer diameters for major Honda cars, SUVs, and light trucks.
By choosing the correct washer size and replacing it during each oil change, you help ensure a reliable seal and reduce the risk of oil leaks.
