Spool Performance BMW N55 S55 Wireless Ethanol Analyzer Kit for M135i, M235i, M2, M3 and M4
Unlock confident E85 tuning with the Spool Performance wireless ethanol analyser kit for BMW N55 and S55 engines. This Bluetooth ethanol content sensor solution lets you see real-time ethanol percentage and fuel temperature on your smartphone, helping you protect your engine and optimise performance on blends from E0 to E85. Perfect for BMW M135i, M235i, M2, M3 and M4 owners who want a reliable, accurate and robust ethanol content monitor with upgraded fuel lines built for high performance.
We run this kit on our own cars and our customers love it for its reliability, simple wireless monitoring and quality PTFE braided lines. If you are searching for a BMW N55 ethanol sensor kit, S55 ethanol analyzer, E85 sensor kit for M3 M4, flex fuel ethanol content analyser, Bluetooth ethanol content monitor for BMW, or a BMW ethanol content sensor with upgraded 6AN PTFE lines, this is the proven choice.
Why you need an ethanol analyser for E85
ASTM guidelines allow pump E85 to vary from 51 percent to 85 percent ethanol. That means what is sold as E85 can sometimes be closer to E55. If your tune expects higher ethanol content than you are actually running, you risk poor performance and potential engine damage. A live ethanol content analyser tells you exactly what is in your tank so you can blend accurately, tune with confidence and protect your N55 or S55 engine.
Key features
- Wireless ethanol content and fuel temperature monitoring via smartphone
- Bluetooth 4.0 Low Energy for minimal phone battery draw and no interference with normal Bluetooth connections
- Reads in-tank ethanol percentage when paired with a GM ethanol content sensor
- Displays fuel temperature in Fahrenheit
- Free Spool Performance app with ethanol mix calculator for perfect blends
- Upgraded 6AN PTFE core braided stainless steel fuel lines, fully ethanol compatible and burst rated for extreme pressures
- Choice of two line configurations:
- HPFP to Fuel Tank – Long line
- HPFP to OEM Line – Short line
- Premium anodised aluminium PTFE fuel line fittings
What this kit is ideal for
- BMW N55 and S55 E85 tuning setups
- Flex fuel builds needing accurate ethanol content data
- Daily-driven and track BMWs requiring robust, ethanol-safe fuel lines
- Owners who want a wireless Bluetooth ethanol content gauge without adding extra gauges to the cabin
Compatibility – BMW N55 and S55
This Spool ethanol analyser kit targets BMW models with the N55 and S55 engines, including:
- 1 Series: F20 F21 M135i and M135ix
- 2 Series: F22 F23 M235i and M235ix, F87 M2 (N55)
- 3 Series: F30 F31 335i
- 4 Series: F32 F33 F36 435i
- M Cars: F80 M3 (S55), F82 M4 and F83 M4 (S55)
Common search terms: BMW N55 ethanol analyser, S55 ethanol analyzer, BMW M3 M4 E85 sensor kit, M135i ethanol content sensor, M235i ethanol content monitor, F80 M3 flex fuel kit, F82 M4 Bluetooth ethanol gauge, N55 6AN PTFE fuel line kit, BMW E85 content sensor.
Ethanol Sensor App
The free Spool app includes an ethanol mix calculator to hit your target blend every time. When paired with the analyser, the app can auto-populate your current in-tank ethanol percentage for quick, accurate calculations. You can also download the app and estimate mixes even if you do not yet have the kit.
Real results and feedback
We have installed and used this Spool ethanol content analyser on our own BMWs and with customer builds. Feedback has been consistently positive for accuracy, stability and the quality of the PTFE braided lines and fittings. It is a go-to solution for anyone serious about safe and consistent E85 or flex fuel use on N55 and S55 platforms.
Fitting and support
Professional fitting available at Nforcd in Warwickshire. Request a fitting quote at Sales@nforcd.com. For mail orders, we run a compatibility check prior to dispatch. Provide your UK registration or the last 7 of your VIN at checkout so we can verify fitment.
Part number
SP-EANS55
Manufacturer
Spool Performance