2007 inverter drain plug

Have you tried using a cheater bar on your breaker bar? That drain plug is snugged on there fairly tight.

 

Welcome! Cheater bar would be my suggestion as well.

The plug is not a bolt. If you need a new one, get one from Toyota. A bolt head will not make a good seal against the gasket. Also, Toyota recommends replacing the gasket with a new one before putting the plug back in. Same with engine oil and transaxle oil.

Also, that may or may not be the drain. My wife's '07 had a valve on the end of a hose closer to the front bumper.

Check out this video. It's a Gen 3, but the similar enough to get you going.

This one is not as professional, but it's specifically, 2nd Generation. IIRC, it's the one I used for reference.

 

If your socket has a good snug fit on the hex of the plug then get a cheater pipe on it to improve your leverage. It can take A LOT of torque to break it loose.

If it still won't come off then leave it and disconnect one of the coolant hoses from the transmission to drain it (mostly). While the hose is still off pour a couple quarts of fresh coolant into the reservior tank to "flush" the old coolant out. Then put the hose on and refill and bleed the system.

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If no one's mentioned this rule of thumb yet:

Get the fill plug open first.

If you get the drain plug out and then find the fill plug is more stubborn, your day just got worse.

 

Are you thinking of the transaxle?

 

I assumed that since the OP mentioned a coolant flush that he was able to remove the plastic cap on the reservior tank.

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Good catch. Yes, I was thinking of the transaxle oil.

 

Well, I'll admit that I thought the same at first since the drain on my wife's '07 was a petcock on the end of a hose like the radiator.

 

I had to use a custom cut to length emt pipe to get that fill plug off. It made such a loud crack when it finally broke loose.
Toyota really sock it down.

Ge to Lowes and in the electrical aisle buy a 10 foot piece of one inch emt pipe. Bring your hack saw with you so you can cut it in half to get into your car. There so handy to slip over breaker bars no strain when you need it. You just extended your breaker bar 3-4 feet..
It works.

I keep a 4 foot piece in the trunks of my cars with a 1/2 inch breaker bar and the correct socket for the wheel lugs.

 

In my Gen 1 the two plugs were the same style, and inches apart on the bottom of the tranny. The secret was the oil drain was the plug in the steel pan, and the coolant drain was the one directly in the aluminum case,

The Gen 1 also used LLC rather than SLLC coolant, and that was more red than the SLLC pink. So if you went for the wrong plug, you'd have to notice whether you were getting red oily stuff or red watery stuff. Or recognize the smell.

 

There is something about the plating that Japanese manufacturers use on most of their fasteners. It seems to do a pretty decent job of resisting corrosion, but I find that I need to use at least four times the torque to break it loose as what it was tightened to.

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