Will this sensor work with my factory ECU or do I need a tune?

Factory ECU recognizes this sensor without modification — no tune required. It's a direct OEM replacement that communicates on the same protocol as the original.

Do I need to disconnect the battery before installation?

Disconnect the negative battery terminal to avoid any electrical feedback when unplugging the old sensor. Let the engine cool fully before working near the sensor location.

What if the check engine light appears after I install this?

A new sensor can trigger pending codes while the ECU relearns sensor parameters — usually clears within 50–100 miles of normal driving. If the light stays on beyond that, scan the code to confirm sensor function versus other system issues.