These instructions apply to the Alfa Romeo Giulia Mk1 (952) 2016-Present. For other models, please choose your vehicle here.
Last updated:
Disconnecting the 12 V battery on your Alfa Romeo Giulia (2016–present) — for a new battery, winter storage, or work near the airbags — catches owners out, because on this rear-drive Giorgio-platform saloon the battery isn’t under the bonnet, it’s in the boot.
Find the Battery First
The 12 V battery is in the luggage compartment (boot), under the floor/trim — the Giorgio platform puts it there for weight balance, like a BMW or Mercedes. There are remote jump terminals under the bonnet, but the battery you service is in the boot.
Disconnecting Safely
- Note your audio/security code if applicable, then switch everything off.
- Lift the boot floor to reach the battery, then disconnect the negative (−) terminal first, then the positive.
- Working near airbags or seat-belt pretensioners? Wait 10 minutes after disconnecting before such work.
Reconnecting and Re-initialising
Reconnect positive first, then negative, then wait 5 minutes before switching on so the modules wake correctly. The Giulia then relearns:
- Power windows — one-touch may need re-initialising (hold the switch fully up/down at the limit).
- Electric boot lid and sunroof (if fitted) relearn their travel.
- Start/stop and steering-angle settle after a short drive; re-enter clock and presets.
If Something Isn’t Right Afterwards
- Warning lights often clear after a short drive once the relearns complete.
- A persistent light stores a code — look it up on autodtcs.com.
- Fit a like-for-like AGM battery — the Giulia’s start/stop needs the correct type.
Frequently Asked Questions
Where is the battery on an Alfa Romeo Giulia?
In the boot (luggage compartment) under the floor — the under-bonnet terminals are jump points only.
How long should I wait near the airbags?
Wait 10 minutes after disconnecting before working on airbags or pretensioners.
Which terminal first?
Negative (−) off first, reconnect it last; wait 5 minutes after reconnecting before switching on.
Do I need to recode anything?
Windows/roof/boot may need a one-touch relearn, and you’ll re-enter the clock and presets.
If a warning light stays on after reconnecting, look up the code on autodtcs.com.
Disclaimer: The information on this page is provided for general guidance only. Always follow your official service manual and safety precautions when working on your vehicle. We are not responsible for errors, omissions, or any damage resulting from the use of this information.
This website is an independent resource and is not affiliated with, endorsed by, or sponsored by Alfa Romeo. All trademarks and brand names belong to their respective owners.