Gearbox refill plug TOYOTA Yaris III Hatchback (XP150)

On a Toyota Yaris III Hatchback, the manual gearbox refill plug is located underneath the car on the transmission casing.

Here is how to find and use it:
- You need to raise and securely support the car to safely access the underside.
- The gearbox refill (fill) plug is usually on the side of the transmission casing, higher than the drain plug.
- It often requires a hex key or specific socket (sometimes a 10mm hex) to loosen.
- When filling or refilling the gearbox oil, you remove the fill plug first to ensure it can be opened before draining.
- The fluid is added until it begins to slightly overflow from the fill plug hole, indicating the proper level.
- Then the fill plug is reinstalled and tightened to the manufacturer's specifications.

Several YouTube videos demonstrate step-by-step gearbox oil changes on Toyota Yaris models, showing the location of both the drain and fill plugs under the car, which helps with visualizing how to access them.

the gearbox refill plug is under the car on the transmission case side, requires a hex or specific socket tool, and filling is done until fluid overflows from it, ensuring the right level.