That's a front tire sensor. I bought one of these on eBay and it worked just fine. Activated it with the TPMS tool and a GS-911. - LINKSomeone had posted a link to this one on Amazon. I haven't used one myself yet.
Amazon.com: Lovey-AUTO OEM # 36238521796 Tire Pressure Monitoring Sensor TPMS for BMW Motorcycle: AutomotiveBuy Lovey-AUTO OEM # 36238521796 Tire Pressure Monitoring Sensor TPMS for BMW Motorcycle: Replacement Sensors - Amazon.com ✓ FREE DELIVERY possible on eligible purchaseswww.amazon.com
I understand if it's not possible but can you share your source for the OEM part @ a discount? I plan or replacing the sensors in my 2016 on the next tire change (end of the riding season).I just when thru this PITA problem. I bought the BMW unit at a large discount. They are $224 at the dealer retail. The upside is they have a warranty and the batteries are not dead on arrival... Price being the downside. The sensor that was in my '16RT had the battery soldered from the bottom as well as the top. As soon as we tried to lift the old battery out we tore the wire out on the circuit board... whoops! I am now waiting for the rear senor to crap out!!