Most Honda engines use an M14x1.5 drain plug with a 17 mm hex head for removal; however there are model-year variations and some transmissions or coolant drain plugs use different sizes. Always verify with your owner's manual or service manual.
This article explains the typical size for the engine oil drain plug on Honda vehicles, how to identify the correct size for your specific model, and practical tips for safe removal and installation to prevent leaks or cross-threading.
Engine oil drain plug: typical size on Honda cars
Before listing the sizes, note that there is variation by model and year. The following details reflect common configurations seen on many modern Hondas.
- Thread size: commonly M14x1.5 for the engine oil drain plug
- Hex head across flats: typically 17 mm
- Washer: copper or aluminum crush washer is typically used and should be replaced with each oil change
- Standard torque range: generally around 20–30 Nm, depending on model; always confirm in the service manual
- Exceptions exist: some Honda engines (rare variants) may use different thread sizes such as M12x1.25 or others; verify for your specific model
In short, for most Honda cars the engine oil drain plug is an M14x1.5 thread with a 17 mm head, but always check your manual for your exact engine specification and torque value.
How to identify the correct size for your specific model
To ensure you use the correct size on your Honda, follow these steps before performing an oil change.
- Consult the owner's manual or service manual for the exact drain plug specification for your year and model.
- Locate the drain plug on the engine oil pan and observe the head size; use the appropriate socket (often 17 mm) to remove or tighten.
- Measure the thread diameter with calipers and determine the pitch (thread spacing); compare to common standards (e.g., M14x1.5).
- Check if a copper/aluminum crush washer is used and ensure a new washer is installed when reassembling.
- If in doubt, contact a Honda dealer or trusted mechanic to confirm the correct size and torque for your vehicle.
By confirming the exact size and torque in the official documentation, you reduce the risk of stripping threads or leaks during oil changes.
Summary
The typical engine oil drain plug for most Honda vehicles is M14x1.5 with a 17 mm head, but there are model- and year-specific exceptions. Always verify with the owner's or service manual and follow torque specifications and washer replacement guidelines to ensure a proper seal and safe maintenance.