iE TrueFlex Sensor Kit For Audi B9 S4, S5, RS5, RS4, & SQ5
iE TrueFlex Sensor Kit For Audi B9 S4, S5, RS5, RS4, & SQ5
iE TrueFlex Sensor Kit For Audi B9 S4, S5, RS5, RS4, & SQ5
iE TrueFlex Sensor Kit For Audi B9 S4, S5, RS5, RS4, & SQ5
iE TrueFlex Sensor Kit For Audi B9 S4, S5, RS5, RS4, & SQ5
iE TrueFlex Sensor Kit For Audi B9 S4, S5, RS5, RS4, & SQ5
iE TrueFlex Sensor Kit For Audi B9 S4, S5, RS5, RS4, & SQ5
iE TrueFlex Sensor Kit For Audi B9 S4, S5, RS5, RS4, & SQ5
iE TrueFlex Sensor Kit For Audi B9 S4, S5, RS5, RS4, & SQ5
iE TrueFlex Sensor Kit For Audi B9 S4, S5, RS5, RS4, & SQ5
iE TrueFlex Sensor Kit For Audi B9 S4, S5, RS5, RS4, & SQ5
iE TrueFlex Sensor Kit For Audi B9 S4, S5, RS5, RS4, & SQ5
iE TrueFlex Sensor Kit For Audi B9 S4, S5, RS5, RS4, & SQ5
iE TrueFlex Sensor Kit For Audi B9 S4, S5, RS5, RS4, & SQ5
iE TrueFlex Sensor Kit For Audi B9 S4, S5, RS5, RS4, & SQ5
iE TrueFlex Sensor Kit For Audi B9 S4, S5, RS5, RS4, & SQ5

iE TrueFlex Sensor Kit For Audi B9 S4, S5, RS5, RS4, & SQ5

IEELCK2

Rated 5.0 out of 5
Based on 13 reviews
$461.99
/
Shipping calculated at checkout.
In Stock

LEADING FEATURES

  • Plug-&-play kit for iE B9 3.0T & 2.9TT TrueFlex Tunes
  • Includes everything needed to install
  • Reliable real-time ethanol content readings
  • Run premium 91/93 up to E85 on one tune

EFFORTLESS ETHANOL

Ethanol is rocket fuel for your B9 S4, S5, RS5, RS4, or SQ5. Our iE TrueFlex Sensor Kit is the required hardware upgrade to convert your 3.0T or 2.9TT engine to flex fuel. The sensor hardware allows your factory engine computer to read and instantly send the ethanol content of your fuel to our advanced TrueFlex tune, unleashing huge power.

INSTALLATION

Upgrading your 3.0T to TrueFlex is simple. Follow our step-by-step guide to install the sensor kit, then flash the TrueFlex tune with your PowerLink app. Fill up with either premium unleaded, E85, or any mix in between and enjoy maximum performance. You can monitor your ethanol content right on the app.

CLICK HERE TO DOWNLOAD INSTALL GUIDE

TRUELFEX REQUIREMENTS

  • Requires iE B9 3.0T or 2.9TT POWERlink Tuning Suite
  • Requires iE TrueFlex Sensor Harness Kit 
  • Requires iE upgraded HPFP for maximum power

Fitment Notes:
-Requires iE TrueFlex Tuning Suite, learn more on the iE B9 3.0T or 2.9TT tuning pages.

-TrueFlex tuning is available for North American 2017-2024 B9/B9.5 S4, S5, RS5, & RS4 & SQ5 models. TrueFlex tuning is not currently supported for Rest-of-world (ROW) ECUs (Europe, Asia, Australia, etc.) for S4, S5, SQ5.

Write a Review
average rating 5.0 out of 5
Based on 13 reviews
  • 5 Stars
    13 Reviews
  • 4 Stars
    0 Reviews
  • 3 Stars
    0 Reviews
  • 2 Stars
    0 Reviews
  • 1 Star
    0 Reviews
100% of reviewers would recommend this product to a friend
Fitment
Rated 4 out of 5
Quality
Rated 4 out of 5
Value
Rated 4 out of 5
Customer photos and videos
Open user-uploaded photo and review in a modal Open user-uploaded photo and review in a modal Open user-uploaded photo and review in a modal
13 Reviews
Reviewed by Tim B.
Verified Buyer
I recommend this product
Rated 5 out of 5
Review posted

2024 B9.5 RS5 True Flex

Just installed the true flex kit to go stage 1 plus, install wasn’t bad but the instructions provided are for an sq5 so some extra steps will have to be performed to be able to get enough access. The windshield wipers do not have to be removed, it’s possible to just remove the weather stripping and bend the cowl up enough to route everything underneath. I had a disparity with the Ecu wire colors, the wire colors on the 2024 RS5 are a little different compared to the ones in the instructions but I was able to make it work by counting the pins. All in all, it was fairly straightforward and the car runs amazingly smooth especially combined with the HPFP piston upgrade kit. Would recommend to anyone that has access to e85 locally, it takes the headache out of running e85.

Loading...
Fitment
Rated 5 out of 5
Quality
Rated 5 out of 5
Value
Rated 5 out of 5
Open Image by Tim B. in a modal
Was this helpful?
Reviewed by David H.
Verified Reviewer
I recommend this product
Rated 5 out of 5
Review posted

Audi S5 Beast

Switching to flex fuel and running E85 was a significant upgrade. The car makes better sound, less heat, is surging to leap forward with throttle inputs, and makes tremendous power compared to 93 octane. Less mpg, but the lower cost of E85 versus 93 octane, saves me a bit of money with E85 and it’s a whole lot more fun to drive. I have every part available that IE offers for my make/model and I crush exotics on a daily basis.

2018 Audi B9 S5 Sportback

Pure 750 Turbo

IE Downpipe

IE HPFP with RS7 injectors

IE Race Series Intercooler

IE Cold Air Intake

IE Charge Pipe

Midpipe

IE Stage 3+ ECU tune

IE Stage 3 TCU tune

740 HP/710 Torque

Loading...
Fitment
Rated 5 out of 5
Quality
Rated 5 out of 5
Value
Rated 5 out of 5
Open Image by David H. in a modal Open Image by David H. in a modal
Was this helpful?
Reviewed by Mario G.
Verified Buyer
I recommend this product
Rated 5 out of 5
Review posted

Plug and GO!

Installation was a breeze. Very happy with the results!

Loading...
Fitment
Rated 5 out of 5
Quality
Rated 5 out of 5
Value
Rated 4 out of 5
Was this helpful?
Reviewed by Ethan S.
Verified Buyer
I recommend this product
Rated 5 out of 5
Review posted

Great mod for the RS5 B9

Love this kit and how I can see the ethanol percentage on the app while driving. No need for an additional sensor monitor to be installed in the car. Instructions were a little off just as the model is slightly different but it was definitely doable.

Loading...
Fitment
Rated 5 out of 5
Quality
Rated 5 out of 5
Value
Rated 5 out of 5
Was this helpful?
Reviewed by Cameron W.
Verified Buyer
I recommend this product
Rated 5 out of 5
Review posted

Flex sensor kit

The quality is great!

Please update dash removal instructions for specific vehicles. But overall instructions were great!

Loading...
Fitment
Rated 5 out of 5
Quality
Rated 5 out of 5
Value
Rated 5 out of 5
Was this helpful?

Not currently legal for road use in California

Because this part doesn't currently comply with California emissions laws, we can't sell or ship it to California addresses. Everywhere else? Full send.

California Prop 65 warning: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.