SPOOL B58 G2 / S58 Plug and Play Motiv Reflex Plus Harness

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.

• Free US shipping on orders over $250.
• Free pickup at our Dallas shop, usually ready within 24 hours.
• Unused parts can be returned within 30 days. Tunes, opened electronics, merch and installed parts are final sale.
• Want it installed? Book the install at thegbmotors.com.

Full details are on our shipping and returns page.