

Product Details
About this part
Upgrade Your BMW N54 Flex Fuel Setup to a CAN Bus installation with EASE!
For customers with the original Flex Fuel for MHD on their BMW N54, we’ve designed an upgrade harness to pair seamlessly with the new FlexFuel+ system. This kit makes installation straightforward and hassle-free.
Here’s how it works:
- Remove your existing Flex Fuel for MHD controller.
- Install the new FlexFuel+ controller and the upgrade harness.
- Connect the upgrade harness to your existing harness.
- Attach the CAN Bus jumpers, reflash your MHD, and you’re ready to go!
For full installation instructions check out the user manual and information HERE.
Fitment
Not sure it fits? Contact us with your car's year, model and VIN and we'll help you confirm before you order.
If a part doesn't fit as expected, contact us and we'll work with you to resolve it.
Majority of products have a fitment section in the product description or within the title.
Returns
- Unused, uninstalled parts can be returned or exchanged within 30 days of the order date.
- To start a return: Contact us first, don't use Return to Sender.
- Returns can have up to a 20% restocking fee.
- Built-to-order and special-order items can't be returned or cancelled once production begins.
Shipping
- Orders are processed 7 days a week to ensure your product ships as quickly as possible.
- Inspect parts within 10 days of delivery, and reach out regarding any damage or missing pieces.
See our Tariff Policy
Warranty
- All parts retain the manufacturer's warranty.
- Warranty claims are subject to the manufacturer's approval.