SPOOL B58 Gen 1 Plug and Play Motiv Reflex Plus Harness

Spool Performance B58 Gen 1 Plug-and-Play Reflex+ Install Harness

The Spool Performance Plug-and-Play Install Harness is the ultimate solution for installing a Motiv Reflex+ on your B58 Gen 1 -powered vehicle—no cutting, splicing, or depinning required.

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.

Only compatible with automatic transmission B58 Gen 1 on MHD and EcuTek.

No tune changes are required when swapping over from posi-tap to our PnP harness.

It will not work on BM3, please purchase MHD or EcuTek.

If you have a G-chassis Gen 1 B58, like BMW G30 540i or G01 X3 M40i, please purchase the G2 harness. This will NOT work.

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.