XM radio cuts out frequently for 15 seconds then resumes. There is no loss of signal indication which would normally appear with other vehicles in tunnels etc.
Occasionally it cuts out for a prolonged period and does not come back unless I turn off the car and restart. Sometimes it will cut out for prolonged periods and not return but the channel selector cycles endlessly until I turn off the car and restart. Turning the sound system off/on doesn't help. My subscription is OK and I've reconnected to XM several times.

Suspect a defect with the receiver. Dealer has no similar complaints.

 

I believe there is a TSB for this on Honda Accord's. I'm not positive about the Accord,mbut have definitely read a TSB for this. I will look and see if I can't find it.

 

I'd take it in for a check. Maybe also report it to Acura Customer Relations.

For what it is worth, my XM Radio works fine.