How to Jump Start a Volvo XC40

1. Clamp the red jumper cable onto the auxiliary battery's positive (+) terminal (1), taking care not to short against other engine bay parts.
2. Fold back the cover over your vehicle's positive (+) jump start terminal (2).
3. Clamp the other end of the red cable to your vehicle's positive (+) jump start terminal (2).
4. Clamp the black jumper cable onto the auxiliary battery's negative (-) terminal (3).
5. Clamp the other end of the black cable to your vehicle's negative (-) ground point (4) and check all clamps are secure.
6. Start the assisting vehicle's engine and let it run a few minutes at about 1500 rpm, then start the vehicle with the dead battery.
7. Remove the cables in reverse order, first the black cables and then the red cables.

• Never use a 48 V support battery to jump start the vehicle.
• Do not touch the cable connections during the start attempt because of the risk of sparking.
• After a jump start, the Start/Stop function should be temporarily deactivated until the vehicle has recharged the battery.

Source: 2021 Volvo XC40 owner's manual, PDF pages 413, 414. 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.