BMW F Chassis B58 B48 B46 B38 Flex Fuel Ethanol Content Sensor for E85 Fuel Monitoring
- Description
- Fitment
- Refund Policy
Know your exact ethanol content in real-time with our new LED display or by using the BMS CANflex, Fuel-It! or JB4 mobile app on your smartphone or tablet.

If you're running E85 or ethanol mixes in your B58, B48, B46, or B38 equipped BMW, you need this kit!
As many of you know the BMW motors can be very picky about how much ethanol you run to achieve peak performance but not run lean. Consequently, we have put together a kit enabling you to easily install an ethanol sensor with no permanent modifications needed. You will simply remove your low pressure fuel line in the engine bay and plug in our kit. It's a complete plug-in solution that utilizes our Bluetooth app to monitor your ethanol content. When you are ready to return to stock, simply remove the kit and re-install the stock fuel line.
All kits include the following:
- Genuine Continental® ethanol sensor
- One stainless steel braided fuel line with black nylon sheathing to protect your other engine bay components
- Proprietary custom billet fitting for plug and play OEM integration
- One custom wiring harness
- One tube of SuperLube® for hose adapter install
Kit with BMS CANbus ECA includes:
- Our new CANflex LED Ethanol Content Analyzer (ECA) to display current ethanol content
- Legacy 5V output for JB4 integration
- Universal CANbus harness for use with future flash tuning integration
Download the free BMS CANflex app here:
Kit with Fuel-It! Bluetooth ECA includes:
- Bluetooth Ethanol Content Analyzer (ECA)
- Plug and Play harness
Download the Fuel-It! ECA app here:
Vehicle Fitment
Compatible with B38, B46, B48, and B58 gasoline engines only.
• 2015-2019 B38/B48/B58 F20/F21 BMW 1 Series Hatchback 116i, 118i, 120i, 125i, M140i, and xDrive
• 2015-2021 B38/B46/B48/B58 F22/F23 BMW 2 Series Coupe and Convertible 218i, 220i, 230i, M240i, and xDrive
• 2015-2019 B38/B46/B48/B58 F30/F31 BMW 3 Series Sedan and Touring 318i, 320i, 330i, 340i, and xDrive
• 2016-2020 B46/B48/B58 F34 BMW 3 Series Gran Turismo 320i, 330i, 340i, and xDrive
• 2016-2019 B38/B48 F35 BMW 3 Series 318Li, 320Li, 330Li, and xDrive
• 2016-2020 B38/B46/B48/B58 F32 BMW 4 Series Coupe 418i, 420i, 430i, 440i, and xDrive
• 2016-2020 B46/B48/B58 F33 BMW 4 Series Convertible 420i, 430i, 440i, and xDrive
• 2015-2021 B38/B46/B48/B58 F36 BMW 4 Series Gran Coupe 418i, 420i, 430i, 440i, and xDrive
Trim, engine, and drivetrain availability varies by country and model year. Verify your vehicle has a B38, B46, B48, or B58 engine before ordering.
*For the JB4 platform connect the white or blue wire to position #4 on the JB4 25 pin harness. Select WMI Ethanol Setup option 0 to enable pin location 2/3/4 flex fuel input.

PRODUCT VIDEOS
Returns
Our policy lasts 14 days. If 14 days have gone by since your purchase, unfortunately we can’t offer you a refund or exchange. All items are subject to 15% restocking fee from the manufacturer.
To be eligible for a return, your item must be unused and in the same condition that you received it. It must also be in the original packaging.
Additional non-returnable items:
Gift cards
Downloadable software products
To complete your return, we require a receipt or proof of purchase.
Please do not send your purchase back to the manufacturer.
There are certain situations where only partial refunds are granted (if applicable)
You will be responsible for paying for your own shipping costs for returning your item. Shipping costs are non-refundable. If you receive a refund, the cost of shipping to you will be deducted from your refund. If your original order qualified for free shipping, the actual cost of shipping the item to you will still be deducted from your refund.
If you would like to start a return please click here
Refunds (if applicable)
Once your return is received and inspected, we will send you an email to notify you that we have received your returned item. We will also notify you of the approval or rejection of your refund.
If you are approved, then your refund will be processed, and a credit will automatically be applied to your credit card or original method of payment, within a certain amount of days.
You will be responsible for paying for your own shipping costs for returning your item. Shipping costs are non-refundable. If you receive a refund, the cost of shipping to you will be deducted from your refund. If your original order qualified for free shipping, the actual cost of shipping the item to you will still be deducted from your refund.
Late or missing refunds (if applicable)
If you haven’t received a refund yet, first check your bank account again. Then contact your credit card company, it may take some time before your refund is officially posted. Next contact your bank. There is often some processing time before a refund is posted. If you’ve done all of this and you still have not received your refund yet, please contact us at info@amtuning.ca.
Sale items (if applicable)
Only regular priced items may be refunded, unfortunately sale items cannot be refunded.
Labor Fees (if applicable)
AM Tuning Canada is not responsible for, and shall not be liable for, any labor fees, installation charges, removal charges, diagnostic fees, or other service-related costs incurred by the customer or any third party in connection with the installation, removal, modification, servicing, or use of any products purchased from AM Tuning Canada. Unless expressly agreed to in writing by AM Tuning Canada, all such labor and service costs are the sole responsibility of the customer.
Exchanges (if applicable)
To start an exchange, click here
Non-refundable items
The following items are non-refundable and non-returnable once purchased: oils, fuel or oil additives, filters, tuning cables, OBDeleven products, Braum seats, spark plugs, coil packs, and similar consumable, wheel spacers, wheels bolts, license plate brackets, electronic tuning components and any other product subject to discretion of AM Tuning Canada.
Other products from brands such as MHD, Bootmod3, Ecutek, Braum racing, Novitec are also non-refundable and non-returnable.
All sales of these items are final and are subject to the policies and discretion of AM Tuning. By completing a purchase, the customer acknowledges and agrees to these terms.
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