What size is the Honda Civic oil drain plug?
Typically, the Honda Civic's oil drain plug uses a metric M14 x 1.5 thread with a 14mm hex head, but the exact size can vary by model year and engine. Always verify for your specific Civic.
Why the size can vary
The drain plug size depends on the engine family and production year. Honda has updated engine designs across generations, and some Civics may use different thread pitches or head sizes. The most reliable source is the official service information for your exact vehicle (engine code and year).
What most recent Civics use
Among recent Civics, a drain plug compatible with a 14mm socket is common, and the thread is frequently M14 x 1.5. However, there are exceptions, especially in earlier generations or specific market variants. To be safe, check the owner's manual or service manual for your engine code to confirm the drain plug size and torque.
How to verify the exact size for your Civic
Use these steps to confirm the correct drain plug size for your car before replacing or purchasing a plug.
- Identify your Civic’s model year and engine code (visible in the owner's manual, or on the engine bay stamp or VIN label).
- Consult the official Honda service information or parts catalog for that exact engine code and year to find the drain plug specification.
- Examine the drain plug head with an appropriate socket: a snug fit in a 14mm socket often indicates a 14mm hex head; if the socket doesn’t fit, avoid forcing a fit and consult documentation.
- If you’re replacing the drain plug, verify the thread size in the parts catalog and ensure you also have the correct washer or crush washer as specified.
Concluding note: Because there is variation across generations and markets, relying on the official documentation for your exact Civic is the safest approach. If in doubt, ask a Honda dealer or qualified mechanic to confirm.
Summary
In short, most modern Honda Civics use an M14 x 1.5 oil drain plug with a 14mm hex head. Always verify for your specific model year and engine by consulting the owner's manual or Honda's service information, and follow the official torque specification when reinstalling.
