What size is the drain plug on a tundra?
The engine oil drain plug on most Toyota Tundra pickups is a 14 mm hex head with an M14 x 1.5 thread. This is the standard size for the engine oil pan on these trucks.
However, there are additional drain plugs on the vehicle—such as for the transmission, transfer case, and differentials—that use different sizes. Exact dimensions can vary by year, engine option, and drivetrain configuration. For precise specifications, consult the owner's manual or the Toyota service manual for your specific year and model, or verify the plug size with a parts specialist or dealer.
Engine oil drain plug size
The engine oil pan drain plug is typically designed for a 14 mm socket. The thread is generally M14 x 1.5, and you’ll use a standard socket wrench to remove or install it. When replacing, ensure you use any required washer or sealant and follow the service manual for the correct torque.
How to confirm your exact specification
To confirm the precise size for your exact truck, check the owner’s manual or the Toyota service manual for your model year. If those aren’t available, contact a Toyota dealer and have your VIN handy, or bring the existing plug to an auto parts store to match the head size and thread pitch. Some updates or changes may occur with different production years.
Other drain plugs on the Tundra
Apart from the engine oil drain plug, the Tundra has drain plugs for systems like the transmission, transfer case, and differentials. These plugs can differ in size and tool requirements depending on the year and drivetrain configuration.
What to know about non-engine drain plugs
When servicing these components, use the correct plug type and sealing method recommended by Toyota. Over-tightening or cross-threading can cause leaks or damage. If you’re unsure, have a professional perform the service or verify exact specifications from the official manuals.
Summary
For the engine oil drain plug on a Toyota Tundra, expect a 14 mm hex head with M14 x 1.5 thread. This size covers most configurations with the i-Force V8 engine, but always verify for your specific year and model. Remember that other drain plugs (transmission, transfer case, differentials) have their own sizes, so consult the manuals or a dealer to confirm before maintenance.
