Will this sensor work with my existing wiring harness?

Yes. This is a direct OEM replacement — connector and pin configuration match factory spec. No adapter or splicing required.

Do I need any tools or hardware beyond basic hand tools to install this?

You'll need a socket set and wrench to remove the old sensor and seat the new one. Mounting hardware uses factory fasteners — nothing extra to source.

What happens if the sensor fails after installation?

You'll typically see a check engine light and may notice rough idle or fuel delivery issues. Get the vehicle scanned to confirm the sensor code before assuming a bad replacement.