By Precision Raceworks, LLC

S58/B58 Plug and Play ReFlex Plus Install Harness

Regular price $199.99 USD
Regular price Sale price $199.99 USD
Shipping calculated at checkout.
SKU: 201-0409

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Regular price $199.99 USD
Regular price Sale price $199.99 USD

The Precision Raceworks S58/B58 Plug and Play install harness for the Motiv ReFlex+ is certified by Motiv and a must for anyone adding a ReFlex+ to their S58 or B58 vehicle! 


With this harness, there is no cutting, crimping, or splicing of your factory harness, and is 100% reversible if you ever need to return your car to stock!  Simply make the appropriate connections and you are done!


What makes the Precision Raceworks Harness different from others?

Simply put, the main harness included with the Motiv Reflex is made very well.  The only real downside to the standard Motiv Reflex harness is the sub harness, which requires splicing into the factory wiring.  So we made a replacement for the sub harness to make everything plug and play.  This saves you a great deal of money when compared to other plug and play options on the market, which ditch the entire harness you are already paying for when you purchase your Reflex Plus controller.


Highlights of the Precision Raceworks X58 Harness:

  • Harness Certified by Motiv Motorsports
  • 100% Plug and Play for easy install
  • Compatible with MHD & MHD+ | EcuTek | BM3
  • Assembled in a ISO 9001 Certified Facility
  • Made with automotive grade wiring
  • Installs in as little as 1 hour
  • Easily Removable, factory harness is not modified


What's included in the box:

  • Plug and play sub harness (compatible with ReFlex Plus standard harness)


Recommended Accessories Sold Separately:


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.



Wire Type: FEP

Wire Gauge: 18-22GA

Replaces: Motiv ReFlex Universal Install Harness


  • B58 or S58 engine
  • Original Motiv ReFlex Main Harness

Video Instructions: HERE

PDF Instructions: Coming Soon

Vehicle Fitment

  • Bmw 340i 2015 to 2019
  • Bmw 440i 2016 to 2021
  • Bmw 540i 2017 to 2024
  • Bmw 640i 2017 to 2024
  • Bmw 740i 2016 to 2024
  • Bmw 740li 2016 to 2024
  • Bmw 840i 2019 to 2024
  • Bmw Alpina B3 2019 to 2024
  • Bmw M140i 2016 to 2019
  • Bmw M2 2023 to 2024
  • Bmw M240i 2016 to 2021
  • Bmw M3 2021 to 2024
  • Bmw M340i 2019 to 2024
  • Bmw M4 2021 to 2024
  • Bmw M440i 2020 to 2024
  • Bmw X3 M 2019 to 2024
  • Bmw X3 M40i 2017 to 2021
  • Bmw X4 M 2019 to 2024
  • Bmw X4 M40i 2018 to 2021
  • Bmw X5 Sdrive40i 2018 to 2021
  • Bmw X5 Xdrive40i 2018 to 2021
  • Bmw X6 Xdrive40i 2020 to 2024
  • Bmw X7 Xdrive40i 2018 to 2024
  • Bmw Z4 M40i 2018 to 2024
  • Toyota Supra 2020 to 2024

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