Fuel-It
AUDI S4 B8 & B8.5 Flex Fuel Ethanol Content Sensor for E85 Fuel Monitoring
AUDI S4 B8 & B8.5 Flex Fuel Ethanol Content Sensor for E85 Fuel Monitoring - view 2
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AUDI S4 B8 & B8.5 Flex Fuel Ethanol Content Sensor for E85 Fuel MonitoringAUDI S4 B8 & B8.5 Flex Fuel Ethanol Content Sensor for E85 Fuel Monitoring - view 2
Fuel-It

AUDI S4 B8 & B8.5 Flex Fuel Ethanol Content Sensor for E85 Fuel Monitoring

SKU: VAG-FFK-A04-CT

AUDI S4 B8 & B8.5 Flex Fuel Ethanol Content Sensor ...Read more

Price:
$454.95
4540 ENTRIES10X
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Car Wheel Size Chart

Wheel Diameter (inches) Tire Width (mm) Aspect Ratio Rim Width (inches)
14185655.5
15195606.0
16205556.5
17215507.0
18225457.5
19235408.0
20245358.5

Note: Wheel and tire sizes vary by car make and model. Always consult your vehicle’s manufacturer for exact specifications.

How to Read Tire Size

Example: 225/45R17 means:

  • 225 = Tire width in mm
  • 45 = Aspect ratio (height as % of width)
  • R17 = Rim diameter in inches

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Product Details

Product Description
Part Numbers
Sizing & Fit

AUDI S4 B8 & B8.5 Flex Fuel Ethanol Content Sensor for E85 Fuel Monitoring

  • Brand: Fuel-It
  • Category: Flex Fuel Kits
  • Part number: VAG-FFK-A04-CT
  • Fits: 2012+ Audi S4; 2012+ Audi S5
  • Bluetooth App Control

If you're running E85 or ethanol mixes in your Audi S4, you need this kit!

Know your exact ethanol content in real-time via the Fuel-it! or JB4 app on your smartphone or tablet.

This is a complete plug and play kit to install a Bluetooth ethanol sensor in your Audi S4 in about 30 minutes. (Check compatibility for your platform below)

Kit includes:

  • New 5/16" E85 compatible fuel lines for your engine bay
  • Genuine Continental® ethanol sensor
  • Fuel-It! Bluetooth analyzer
  • 5/16" quick connect fitting
  • Oetiker crimp clamps to secure your new fuel lines
  • Includes both Bluetooth App & 5v analog output for JB4 or flash tuning


Download the Fuel-It! ECA app here:

Vehicle Fitment

  • Audi S4 B8
  • Audi S4 B8.5


Vehicle fitment

Years Make Model
2012+ Audi S4
2012+ Audi S5

AUDI S4 B8 & B8.5 Flex Fuel Ethanol Content Sensor for E85 Fuel Monitoring

  • Brand: Fuel-It
  • Category: Flex Fuel Kits
  • Part number: VAG-FFK-A04-CT
  • Fits: 2012+ Audi S4; 2012+ Audi S5
  • Bluetooth App Control

If you're running E85 or ethanol mixes in your Audi S4, you need this kit!

Know your exact ethanol content in real-time via the Fuel-it! or JB4 app on your smartphone or tablet.

This is a complete plug and play kit to install a Bluetooth ethanol sensor in your Audi S4 in about 30 minutes. (Check compatibility for your platform below)

Kit includes:

  • New 5/16" E85 compatible fuel lines for your engine bay
  • Genuine Continental® ethanol sensor
  • Fuel-It! Bluetooth analyzer
  • 5/16" quick connect fitting
  • Oetiker crimp clamps to secure your new fuel lines
  • Includes both Bluetooth App & 5v analog output for JB4 or flash tuning


Download the Fuel-It! ECA app here:

Vehicle Fitment

  • Audi S4 B8
  • Audi S4 B8.5


Vehicle fitment

Years Make Model
2012+ Audi S4
2012+ Audi S5

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