Do I need any special tools to get the old hub out?

You'll need a socket set, a hub puller, and basic hand tools. The brake caliper and rotor come off first, then the hub bolts pull free from the knuckle. It's straightforward once the wheel is off — no surprise fastener sizes.

Does this come with the ABS sensor, or do I reuse the old one?

The sensor ring is already cast into this hub assembly. You'll transfer your old ABS sensor to this new hub using the same mounting bracket and connector — no new sensor needed.

Can I install this myself, or do I need alignment afterward?

Wheel alignment is not affected by hub replacement — you're only swapping the rolling assembly at the knuckle. Install it with basic hand tools and torque everything to spec. No alignment shop visit required.