00-05 Buick LeSabre OE Style Heated Mirror Glass Lens - Left

How do I know the heating element is working after installation?

Once the glass is mounted and the heating circuit is connected to your mirror harness, switch on your vehicle's rear defrost — the heating element activates on the same circuit. You should feel warmth across the glass surface within 30 seconds. If nothing happens, check your vehicle's electrical connection at the mirror base.

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

No adhesive required. This lens mounts directly to your existing mirror housing using factory mounting tabs — the same way the original came out. You'll need basic hand tools to remove the old lens and seat the new one. The electrical connector plugs into your existing harness.

What if the lens doesn't heat after I install it?

First, confirm your vehicle's rear defrost is actually on and functioning — that's the same circuit. Check that the electrical connector is fully seated and not corroded. If heat still doesn't activate, the issue is likely in your vehicle's mirror control module or wiring, not the lens itself. Test the circuit at your mirror's harness with a multimeter before assuming the lens is faulty.