The GENUINE part, as sold new by the dealer.
Priced SET. This is a stock replacement coil for the S85. Symptons of a coil going bad include a misfire, rough running, and usually a SES light with a fault code stored in the DME. Replacing the coils yourself is cheap and easy to do. You could even keep one with you as a spare. This is good advice as a bad coil can happen at any time with no warning.
Part #'s
12-13-7-841-556 / 12 13 7 841 556 / 12137841556
12-13-7-835-108 / 12 13 7 835 108 / 12137835108
⚠️CALIFORNIA WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov