How to Jump Start a MINI Hardtop 4 Door

1. Check that the other vehicle's battery is 12 volts, switch off its engine, and turn off power consumers in both vehicles.
2. Open the covers of the jump-start terminals in the engine compartment.
3. Connect one clamp of the positive cable to the positive terminal of the assisting vehicle, and the other to the positive terminal of the vehicle being started.
4. Connect one clamp of the negative cable to the negative terminal or engine/body ground of the assisting vehicle.
5. Connect the second negative clamp to the negative terminal or engine/body ground of the vehicle being started.
6. Start the donor engine and let it run several minutes at increased idle, then start the other engine as usual.
7. Let both engines run for several minutes, then remove the cables in reverse order.

• Use only jumper cables with fully insulated clamp handles, and make sure the vehicles do not touch each other.
• If the first start fails, wait a few minutes before trying again; with a diesel donor engine let it run approx. 10 minutes.
• Never use spray fluids to start the engine.

Source: 2025 MINI Hardtop 4 Door owner's manual, PDF pages 341, 342. Steps are summarized in our own words (AI-assisted, checked against the cited pages 2026-10-18). Other model years can differ; your manual has the final word.