AUDI S4 Bluetooth Flex Fuel Kit for the B8 & B8.5

The Bluetooth ethanol analyzer is a must-have for ethanol systems. Works perfectly for my E tunes—quick real-time ethanol content levels, ethanol/octane formulations for blends, user-friendly mobile app for live data on the road. Reached out to customer service for troubleshooting. Team responded fast and stayed engaged throughout. Very impressed with their clear, transparent instructions that helped me fully resolve the issue. Among the best customer service I’ve experienced.