Will this pump work if my reservoir still has the old sensor wiring?

Yes. The pump itself has no sensor connector—just cap off or disconnect the old wiring harness from your reservoir. The pump will function on power alone.

Do I need any special tools or hardware to install this?

Basic hand tools are all you need. The pump mounts at the factory location using the original fasteners. No drilling or modifications required.

What if my washer fluid level warning light was triggered by the old sensor?

Without a sensor, that warning light won't activate. You'll need to monitor your fluid level manually or have a mechanic disable the dash warning if it persists.