Product Details
About this part
Spool Performance B58 Gen 2 / S58 Plug-and-Play Reflex+ Harness
The Spool Performance Plug-and-Play Harness is the ultimate solution for installing a Motiv Reflex+ on your B58 Gen 2 or S58-powered vehicle—no cutting, splicing, or depinning required.
Unlike traditional installs that require tapping into the DME or accessing the cramped passenger-side footwell (a major challenge for mild hybrid models with the large battery cubby), our harness streamlines the process. Installation is fully reversible, making it easy to return to stock if needed.
Why choose our harness over others?
What sets our kit apart is its modular design. Rather than replacing the entire Reflex flying lead harness, our plug-and-play solution connects directly to it. You simply swap out the sub-harness that typically comes standard and replace it with ours. That means no more posi-tap connectors and no pinning into the DME—just plug it in and go.
This also means significant cost savings, avoiding the need to spend over $600 on a full custom harness.
Note: Your tuner will need to read CAN via PTCAN-2.
Only compatible with automatic transmission B58 Gen 2 and S58 and MHD+ or EcuTek.
Gen 1 Harness: https://spoolperformance.com/collections/bmw-performance-products/products/spool-b58-gen-1-plug-and-play-motiv-reflex-plus-harness
Requirements and Compatibility:
- Does not include the MOTIV ReFlex
- Requires Standard ReFlex Main Harness
- Does not include a fuel lines or fuel line adapters
- Does not include a flex fuel sensor
- Wiring fitment is compatible with all known aftermarket intake manifolds and various port injection plates.
Note: This Harness replaces only the signal and power sub harness portion of the Motiv Reflex. Standard universal Motiv ReFlex Plus harness required for use of this Plug and Play Harness.
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.