Nothing really, though if you take the dogbones out, and rock the engine forward and lock it, it'll give you more room. Just look down by the power steering from the top, and you'll see it.
When I removed it (the connector was glued in, wtf?) I read that you had to install a new o-ring, or it could mess with the sensors accuracy..so thats what I did. I think it's held in by a 10mm, but it's been ages.