I just did this and had to remove the oil cooler and power steering reservoir.
I think a 1/4" closed end wrench will fit over the torx bolt but I never did that. I removed everything since I wanted to clean all the oil that leaked from my seals.
It is hard to get in there with the oil cooler and power steering reservoir there.
It was a pretty easy job to be honest just a bit messy. I forgot to drain my coolant overflow tank/reservoir before I started so when I removed the oil cooler a bunch of coolant poured out. Luckily I stuffed an old bath towel in there under the cooler and it prevented a huge mess. Don't forget to do that and also suck the PS fluid out.
If removing the cooler and PS reservoir you need to buy new seals.
This DIY article helped me out. Looks like you grabbed your pic from the same DIY.
The only real hang up I encountered was getting the PS reservoir C -clip out. It was tricky to say the least trying to pry it off without dropping it in the engine bay. You have to somehow manage to get a small flat blade screwdriver in behind the PS reservoir to be able to pry that c-clip off.
I figured installation of that clip would be even more difficult but it was easy and went back on in 30 seconds.
Also, when I replaced my cam sensors and magnets, I really cleaned out the old gunk and oil from where the sensors press into the motor. I made sure the lip where the rubber o-ring of the seal seats was nice and clean and I experienced no leaks afterward.
I also made sure the whole front of the motor was free of dirt and old oil so if a new leak appears, I can pin point where it is coming from.
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