

$75.00USD
BMW Modifications / ECU Tools & Hardware
Fits: E36 · E46 · E39 · X3 · X5 · Z3
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.
| Engine | BMW M52TU / M54B25 / M54B30 |
| ECU | Siemens MS42 & MS43 |
| Chassis | E36, E46, E39, E60, X3, X5, Z3, Z4 |
| Fulfillment | Ships within 1–3 business days |
| Carrier | USPS Priority Mail with tracking |
| Ships from | United States |
Have a question before purchasing? Contact us.