The oil drain plug on the 2012 Honda Odyssey uses a 14mm hex head, so a 14mm socket (or wrench) fits the plug for loosening and tightening. This guidance covers the 3.5L V6 powertrain common to that year.
In this model year, the drain plug sits on the bottom of the oil pan and is typically paired with a crush washer that should be replaced when the plug is removed. While 14mm is standard, always confirm the plug head by inspection before you begin.
Socket size specifics for the 2012 Odyssey
The oil drain plug on the 2012 Odyssey has a 14mm hex head. This means the external size of the bolt head is 14 millimeters across the flats, and the corresponding socket size to fit is 14mm. The thread on the plug is typically metric (M14x1.5) on Hondas of that era, and the plug is paired with a crush washer that should be replaced when the plug is removed.
What you’ll need
Before you begin, gather the essential tools and supplies to perform a clean oil drain and fill.
- 14mm socket (and ratchet) to remove and reinstall the drain plug
- Oil filter wrench and replacement oil filter
- Appropriate engine oil for the Odyssey's capacity (check owner's manual)
- Oil drain pan to catch old oil
- Funnel for pouring new oil
- Crush washer for drain plug if applicable
- Jack stands or ramps for access (optional but recommended)
The items listed above are the essentials to correctly drain and refill the engine oil, avoid spills, and ensure the drain plug and washer are properly seated.
Oil drain plug change steps
Follow these steps to perform the drain and fill process safely and correctly.
- Warm up the engine briefly, then park on a level surface and engage the parking brake.
- Raise the vehicle with a jack and secure with stands or ramps if needed for access.
- Place the drain pan under the oil pan drain plug.
- Using a 14mm socket, loosen and remove the drain plug slowly to allow oil to drain into the pan.
- After draining, clean the drain plug and install a new crush washer if required, then thread the plug back in and snug it by hand, tightening to the manufacturer’s specified torque.
- Remove the old oil filter (if replacing) and install a new filter, lubricating the new filter’s gasket with a bit of fresh oil.
- Reinstall the drain plug with a new washer and tighten to the manufacturer’s specified torque.
- Fill the engine with the correct amount and type of oil using a funnel; replace the oil fill cap.
- Start the engine, run for a minute, check for leaks, then turn off and let it sit for a few minutes. Check the oil level with the dipstick and top up if needed.
Following these steps helps ensure a proper oil change with the correct drain plug seating and oil level.
Summary
The 2012 Honda Odyssey uses a 14mm socket for its oil drain plug. Gather a 14mm socket, drain pan, replacement crush washer, an oil filter, and the appropriate oil, then follow standard safety practices and the vehicle’s manual for torque specifications and oil capacity.