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Activating XM radio in your car is usually a quick process, but the steps differ depending on whether your vehicle is new, used, or still covered by a dealer trial. This guide walks you through each scenario so you can start listening as soon as possible.
This is an independent guide and is not affiliated with, endorsed by, or sponsored by SiriusXM.

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Before you start

Make sure you have your Radio ID (also called ESN or SID) ready. You can usually find it by tuning to channel 0 on your radio, or on a label on the radio unit itself. If you need help locating it, see our guide on finding your Radio ID. Also, park your car outdoors with a clear view of the sky before you begin activation. Satellite signals need an unobstructed path, so garages, carports, and underground parking can block the signal and delay activation.

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New cars with a dealer trial

Many new vehicles come with a complimentary XM trial sponsored by the manufacturer or dealer. Here is how it typically works:
1

Turn on the radio

Start your vehicle and switch to XM mode. If a trial is active, you should already hear channels.
2

Check trial status

Look for an on-screen message or menu option that shows your trial status and expiration date.
3

Decide before it ends

If you want to keep service after the trial, contact SiriusXM or visit siriusxm.com before the trial expires to choose a plan and avoid interruption.
You do not need to activate a dealer trial manually in most cases. The trial begins automatically when the vehicle is sold.

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Used cars with an active subscription

If you bought a used car and the previous owner had an active XM subscription, the radio may still work for a short time. However, the subscription belongs to the owner, not the vehicle. Here is what to do:
1

Check if channels are playing

Turn the radio to XM mode. If you hear channels, note how long they remain active.
2

Start your own subscription

Visit siriusxm.com or call SiriusXM customer care to set up a new subscription in your name. You will need your Radio ID.
3

Ask about transfer offers

In some cases, the previous owner can transfer their subscription to another radio. If you know the previous owner, they may be able to move their plan to a new device and let you start fresh.
Do not assume a used car’s XM service will stay active indefinitely. The previous owner can cancel or transfer their subscription at any time, which will stop service to your vehicle.

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Activating a radio that has never been subscribed

If your car has an XM-capable radio but has never been activated, follow these steps:
1

Park outdoors

Find a spot with a clear view of the sky. This is important because the activation signal is sent via satellite.
2

Gather your Radio ID

Tune to channel 0 or check the label on your radio unit.
3

Contact SiriusXM

Visit siriusxm.com or call SiriusXM customer care. Provide your Radio ID and follow the prompts to choose a plan and activate.
4

Wait for the signal

Activation can take 10 to 15 minutes. Keep the radio on and in XM mode during this time.
If channels do not appear after 15 minutes, try turning the radio off and on, or moving the vehicle to a more open area. You can also request a signal refresh from siriusxm.com.

Find Your Radio ID

Learn where to locate your ESN, SID, or Radio ID on your XM radio or vehicle display.

Free Trial Guide

Understand how vehicle free trials work, what happens when they end, and how to manage renewal.

Refresh Your Signal

Send a refresh signal to your radio if channels are missing or not updating.