I just want to thank this community for information that led me to replace the Starter Immobilizer (9442961) antenna. It may have been one of the easiest replacement jobs of all time. I didn't decide my failure to get started was attributable to this unit until it appeared to fail badly and the light on top of the dashboard was going crazy with every unsuccessful start attempt. We fortunately were never actually stranded and had intermittent failures for 2 years until it gave up the ghost in the garage last week. Thanks for the assist!

Interesting side note: Old part made in Australia; new one in India.