Disconnect and Reconnect the Battery

Renewing a flat battery or disconnecting for other work on your Volvo XC60 (246, 2018–present)? The 12 V battery is in the engine bay. There are plenty of reasons an owner ends up here: fitting a fresh battery when the old one no longer holds charge, isolating the electrics before bodywork or an audio install, laying the car up for winter storage, or recovering after a jump-start that never quite stuck. None of it is difficult. Work in the correct terminal order, give the modules a moment to power down, and the XC60 wakes up and relearns its settings cleanly — you are not going to “break” the car by taking the battery off.

Where the 12 V Battery Is

Open the bonnet — the 12 V battery sits in the engine compartment, generally under a moulded plastic cover or trim panel that you unclip or lift away to reach the terminals. Once it is exposed you will see two posts: the negative (−) is the black one, usually marked with a minus symbol, and the positive (+) is the red one under a hinged red cap, marked with a plus. Take a moment to identify both before you pick up a spanner — getting the order right is the whole job.

On the petrol and mild-hybrid XC60 there is no high-voltage traction system to worry about. On the Recharge plug-in hybrid the 12 V battery is still the owner-serviceable one and the procedure below applies unchanged, but never touch the orange high-voltage cabling or the traction battery — that is strictly a workshop task. (The fully electric XC60 is not covered here.)

First, a Few Checks

• Make sure the ignition is fully off and the car is not in READY — the dash should be completely dark.
• Take the smart key well away from the car so keyless access can’t silently wake the electronics.
• Switch off the lights, climate, and anything plugged into the 12 V sockets; close the windows and tailgate.
• Note down any radio or infotainment security details you keep, and be ready to re-enter presets afterwards.
• Wait a couple of minutes after switching off so the control modules go to sleep before you disturb anything.
• Have the correct spanner to hand (the clamps are usually a 10 mm nut) and wear gloves and eye protection.

This is a common job.

Disconnecting

1. Switch everything off, remove the key, keep it away from the car and wait a couple of minutes for the modules to power down.
2. Slacken the nut on the negative (−, black) terminal first, ease the clamp off the post and lift it clear so it can’t spring back onto the terminal.
3. Only if you are removing the battery, release the positive (+, red) clamp next; otherwise leaving positive connected is fine for most electrical work.
4. Undo any hold-down clamp and lift the battery out if you are replacing it, keeping it upright.

Reconnecting

1. Sit the battery back in its tray and secure the hold-down if you removed it.
2. Fit the positive (+) first, seat the clamp fully, then fit the negative (−) last, and tighten both firmly so there is no movement.
3. Switch the ignition on, wait a few seconds for the systems to boot, then start the engine.

What You’ll Need to Reset Afterwards

Cutting the 12 V supply wipes a handful of learned and stored settings. On the XC60 you will typically need to re-set the clock and re-store your radio/infotainment presets, then re-store your tyre pressures so the monitoring system has a fresh reference. If a window stops auto-closing or the anti-pinch feels off, re-initialise the windows. Seat and mirror memory positions may need re-storing, and a couple of warning lights can appear briefly — most self-clear once the car has seen a short drive and everything has re-synchronised.

If a Warning Light Stays On or the Car Feels Off

• Check both clamps are tight and fully seated — a loose terminal causes the most trouble after a battery job.
• Let the car relearn over a gentle drive of a few miles before assuming anything is wrong.
• Re-run the window initialisation if the one-touch or auto-up has stopped working.
• If the car cranks slowly or the light won’t go, rule out a genuinely tired or flat battery rather than the disconnection itself.
• Read any stored fault code to see exactly what the car is flagging before spending money.

Frequently Asked Questions

Where is the battery on a Volvo XC60?

In the engine bay, under a plastic cover you lift or unclip. It is a standard 12 V battery on petrol, diesel, mild-hybrid and Recharge plug-in-hybrid versions — the same one you service on all of them.

Which terminal comes off first?

Always the negative (−, black) first when disconnecting, and the positive (+, red) first when reconnecting so the negative goes on last. Doing it this way avoids any short-circuit against the bodywork while you work.

What resets when I disconnect the battery?

Expect to redo the clock, radio and infotainment presets, and the tyre-pressure reference. The windows may need re-initialising, seat and mirror memory can drop, and a few warning lights may show briefly before clearing on a short drive.

Do I need to code a new battery?

Volvo recommends registering a new battery so the charging system matches its age and type. The car runs perfectly without that step, but registering helps the smart-charging logic look after the new battery and preserve its life.

Will disconnecting the battery clear a fault code or the service light?

It can clear some temporary codes, but it is not a proper fix — a real fault simply logs again. The service reminder is mileage/time based and generally isn’t reset just by pulling the battery, so use the correct reset procedure for that.

Can I jump-start it instead of disconnecting?

Yes — if the battery is only flat, a jump-start or a mains charger avoids losing your settings altogether. Disconnect the battery only when you are renewing it or need the electrics dead for other work.

Done in the right order this is a straightforward driveway job. If a warning light stays on afterwards, check the code on autodtcs.com.