Garmin GMU 11 Magnetometer 010-04349-00 Click here to purchase or contact the seller of this item on eBay
Current Price: 325.00 USD

Brand new in the box with paper work Garmin GMU-11 magnetometer. Was included with my new 3x purchase but already had one for the G5. Never used. Don’t know of Garmin warranty still applies but I would think so. A quick call to Garmin would confirm with serial number.