Problem with reverse textures

I have repainted textures for an ai car with a text on the left and right door.

Viewing the car ingame the text on the right door appears normal, but the text on the left door is reversed, like a mirror of the text on the right door.

I have saved the texture as a 32-bit tga and have tried several ways to fix this problem but without success.

Can anyone help to solve this?


Thanks
Michael