Product Description
BMW S55 Wireless Ethanol Analyzer Kit - Spool Performance SPX-3B33-4H44-000
The Spool Wireless Ethanol Analyzer Kit is an affordable and reliable solution for monitoring ethanol content and fuel temperature in your vehicle. Paired with a GM ethanol sensor and our free smartphone app, this system provides real-time data on the ethanol concentration percentage in your tank as well as fuel temperatures in Fahrenheit. The Analyzer module uses the latest Bluetooth 4.0 Low Energy (BLE) protocol, ensuring minimal battery consumption on your smartphone while maintaining full functionality of your device's regular Bluetooth connectivity.
Why Do You Need an Ethanol Analyzer?
According to ASTM guidelines, E85 fuel can vary in ethanol content from 51% to 85%, which means the E85 at the pump could actually be E55 with just 55% ethanol. This variability can cause serious issues for enthusiasts running performance E85 tunes. If your tune assumes higher ethanol content than the fuel you're using, it could result in engine damage.
By knowing the exact ethanol content in your tank, you can protect your engine and ensure optimal performance. The Spool Ethanol Analyzer Kit gives you the peace of mind you need when running ethanol blends.
Ethanol Sensor App
Our app sets itself apart from the competition by being truly free of cost while offering advanced features like an Ethanol Mix Calculator to help you achieve the perfect blend.
- Automatically reads in-tank ethanol content for precise calculations (with the analyzer installed).
- Can also be used independently of the analyzer to estimate mixes manually.
Upgraded Fuel Lines
The Ethanol Analyzer Kit includes upgraded 6AN PTFE-core fuel lines with black nylon coating and braided stainless steel construction. These lines are 100% ethanol-compatible and burst-rated for extreme pressures.
Fuel line options available:
- HPFP to Fuel Tank [Long Line]
- HPFP to OEM Line [Short Line]
Each line is equipped with proprietary anodized aluminum PTFE fittings and is compatible with both OEM and Spool FX-150/FX-180 high-pressure fuel pumps (HPFP).
Lifetime Warranty
As with all Spool Performance products, the Ethanol Analyzer Kit is covered by our Lifetime Warranty Program, ensuring you receive the quality and durability we stand behind.

Our goal at SPOOL PERFORMANCE is to offer the highest quality parts for the most affordable price without sacrificing performance. We pride ourselves on our commitment to exceeding the industry standard for customer service, performance, and product quality. Before the release of any of our products, our engineers at SPOOL PERFORMANCE make sure that our products will live up to expectations. The development of any part goes through stages of rigorous research, CAD designing, prototype development, CFD analysis, and endurance testing. Fitment, functionality, and longevity are extensively tested before any product makes it to our website for sales. During our beta testing stage, testers from all across the nation and often around the world will push our products to the limit to make sure that our products exceed customer expectations in different environmental settings and across a variety of different power levels our customers are at.