Bench pinout

BMW MG1 / MD1 bench connection

Five-wire bench connection for the BMW and MINI Bosch MG1 and MD1 families — two +12 V feeds, ground and the CAN pair, on the connector positions marked below.

Bench pinout card showing the five marked positions across the six ECU connectors: +12 V and the CAN pair on connector 1, ground and a second +12 V feed on connector 5 — Pin positions confirmed against the manufacturer bench diagram (September 2026). Download the card (PNG)

Petrol DME

MG1CS003Petrol
B38, B48, B58, N74 · 1–4 Series, X1 / X2, MINI Clubman / Cooper / Countryman · ≈2014–2019
MG1CS024Petrol
B58TU 3.0T · M240i / M340i, 540i / 740i, X3 / X4 M40i, Z4 M40i, X5 / X6 40i, GR Supra 3.0 · ≈2019+
MG1CS201Petrol
B38, B46, B48 (1.5 / 2.0T) · 2–5 Series, X1–X7, Z4, MINI F54–F57, GR Supra 2.0 · ≈2018+

Diesel DDE

MD1CS001Diesel
B37, B47 (2.0 diesel) · 1 / 2 Series, X1 / X2, MINI diesel · ≈2014+
MD1CP002Diesel
B47 / B57 (2.0 / 3.0 diesel) · 3–7 Series, X3 / X4 / X5 / X7 (20d–40d), Alpina D3 / D5 · ≈2015+
MD1CP032Diesel
B57 (3.0 diesel) · 530d / 540d / 740d, X3 / X4 / X5 (30d / 40d), Alpina D3 S / XD3 / XD4 · ≈2020+

Fitted across BMW, MINI, Alpina and BMW-derived Toyota models carrying these ECUs. Coverage is representative — the same model range can carry different ECU generations by build date and market.

Connections

+12 V — two feeds (connectors 1 and 5)
Ground (connector 5)
CAN pair (connector 1) — H/L assignment follows your harness

The connector positions are what is shared; use the harness that matches your tool for the actual wires.

Before you connect

Identify the ECU from its part number first — bench work on the wrong unit or a mismatched harness can leave a module in a bad state.

Shared fit is not shared firmware.

These ECUs share a physical connector group, but firmware security and unlock requirements differ between variants and software versions. Confirm access for the exact ECU before reading or writing.

All bench pinouts