The oil drain plug on a 2016 Honda Odyssey (3.5L V6) typically uses a 14 mm hex head, which is about 9/16 inch across the flats. This is the standard size for the factory drain plug on this model year, though aftermarket or dealer-installed plugs could differ. If in doubt, verify by inspecting the plug directly or consulting the owner's manual.
Understanding what this means for maintenance
Using the correct hex size helps prevent stripping the head during oil changes and ensures a proper seal when the plug is reinstalled. The 14 mm size is common for this engine family, making routine oil changes straightforward with a standard metric socket set.
How to verify the size on your vehicle
Before you begin, locate the drain plug under the engine oil pan with the vehicle on a level surface and the engine cool. The plug head should accept a 14 mm socket with a snug fit. If the 14 mm socket feels loose or won’t engage, stop and reassess—your vehicle may have an aftermarket or different-spec plug installed. In that case, consult the owner's manual or a Honda service professional for VIN-specific guidance.
Common questions about the 2016 Odyssey drain plug
Key takeaway: for most 2016 Odysseys, the drain plug head is 14 mm; some owners may encounter variations due to aftermarket parts. Always replace the drain plug gasket when you drain the oil to ensure a proper seal and prevent leaks.
Summary
In short, the oil drain plug for a 2016 Honda Odyssey is normally a 14 mm hex head (roughly 9/16 in). Verify with your manual or by inspecting the plug, and ensure you use a new gasket and appropriate torque when reinstalling to maintain engine lubrication integrity.