MS43 MS42 Bench Harness

BMW Modifications / ECU Tools & Hardware

Fits: E36  · E46  ·  E39  ·  X3  ·  X5  ·  Z3

Overview

This is a ready-made bench harness for the Siemens MS42 and MS43 ECU. It breaks out all necessary connectors to power and flash the ECU on the bench — fully outside the vehicle. No splicing, no fabrication required.

Designed for anyone doing ECU programming, ISN/VIN work, or flashing on a used unit before install. Works with a standard 12V bench supply or car battery and is compatible with common MS42/MS43 flashing tools.

Compatibility

What's included

• Pre-built bench harness with MS42/MS43 ECU connector(s)
  
• Pinout reference and bench setup instructions

How to use

1. Plug the harness into your MS42 or MS43 ECU
2. Connect the power leads to a 12V bench supply
3. Connect your flashing tool and flash as normal — no vehicle required

Shipping

Have a question before purchasing? Contact us.