Do these sensors require any special wiring or adapter harnesses?

No. Both sensors plug directly into factory connectors using OEM-spec terminals. No adapters, splitters, or wiring modifications needed.

Will these clear my check-engine light?

If the code is sensor-related (P0130, P0135, or similar), yes — these will resolve it once installed and the system relearns. If the code stems from another engine component, the light will remain until that issue is addressed.

Can I install just one sensor, or do both need to go in at the same time?

Both should be replaced together. Pairing mismatched sensors (one new, one worn) can create fuel trim imbalances and cause codes to return.