The typical oil drain plug on most Honda engines uses a 17 mm wrench. However, exact sizes can vary by model and generation, and some older or smaller engines may use a 14 mm head or a different drive type. Always verify with your owner's manual or inspect the plug head to be sure.
This article explains the common sizes you might encounter on Honda cars and motorcycles, how to identify the correct size for your specific model, and what to do if the plug head isn’t the standard hex shape.
Common sizes you may encounter
Here is a quick reference of the sizes you’re most likely to run into on Honda engines. The goal is to help you pick the right wrench without damaging the plug.
- 17 mm hex socket: The overwhelmingly common size for engine oil drain plugs on modern Honda cars and many motorcycles.
- 14 mm hex socket: Some older or smaller-displacement Honda engines may use this size for the drain plug.
- Alternative head types: A few plugs may use an internal Allen (often 6 mm) or Torx drive; if a standard hex socket doesn’t fit, inspect the plug head to identify the drive type.
To determine the exact size for your vehicle, consult the owner’s manual or service manual for your model year, or inspect the drain plug head directly. If in doubt, bring a wrench or socket set to the repair and verify the fit before applying force.
How to verify for your specific model
The most reliable method is to check the official documentation for your exact model and year. Honda’s dealership parts departments and service manuals provide model-specific drain plug sizes and torque specs. If you don’t have the manual handy, you can often find model-specific information online or by contacting a dealership.
When in doubt, start with a clean, undamaged 17 mm wrench and test fit carefully on the plug head. If it doesn’t seat properly, don’t force it—reassess to avoid rounding the bolt or damaging the pan. Replacing a damaged drain plug or crush washer should be done following the manufacturer’s guidance to maintain a proper seal.
Summary
In short, the drain plug wrench size for most Honda vehicles is typically 17 mm, with occasional exceptions such as 14 mm for some older or smaller engines. Always verify your model’s specific size via the owner's or service manual or by inspecting the plug head directly. Proper technique and torque, plus a new washer when required, help ensure a leak-free drain and a long-lasting seal.