Do I need to splice into the electrical harness?

No. This mirror uses the factory connector — plug it straight into the existing wiring under the door panel. Your van's power mirror switch controls it immediately.

Will I need fasteners or hardware to bolt it on?

Mounting bolts are not confirmed in the product listing. Verify your current mirror's fastener spec before ordering, or confirm with us which bolts match your Odyssey's rocker panel attachment points.

Can I return this if it doesn't fit?

Check the fitment details for your specific model year and door side before purchase. If there's any doubt on your year or configuration, reach out before ordering to confirm compatibility.