These instructions apply to the Porsche Taycan Mk1 (Y1A) 2020-Present. For other models, please choose your vehicle here.
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Disconnecting the 12 V battery on your Porsche Taycan (2020–present) — for a new battery, storage, or work near the airbags — is straightforward, but as a full EV there are two important points: where the 12 V battery lives, and the high-voltage system you must leave alone.
Two Separate Systems
- 12 V battery — in the front luggage compartment (frunk), under the floor trim. This is the one you disconnect and replace, exactly like a normal car battery.
- High-voltage traction battery — under the floor. Never touch the orange high-voltage cabling; it is not owner-serviceable. All the jobs below use only the 12 V.
Disconnecting Safely
- Switch the car off and keep keyless transmitters well away (outside range).
- Lift the front-compartment floor trim, then disconnect the negative (−) earth cable first, then the positive.
- Working near airbags or pretensioners? Insulate the earth cable and wait at least 10 minutes before such work.
Reconnecting and Re-initialising
Reconnect positive first, then negative. The Taycan then relearns:
- Tyre-pressure monitoring re-initialises (drive to confirm).
- Power windows — one-touch needs re-initialising (see our Taycan window-reset guide).
- Re-enter the clock and presets.
If Something Isn’t Right Afterwards
- Warning lights often clear after a short drive.
- A persistent light stores a code — look it up on autodtcs.com.
- Fit a like-for-like AGM battery; registering it to the energy manager needs Porsche equipment.
Frequently Asked Questions
Where is the 12 V battery on a Porsche Taycan?
In the front luggage compartment (frunk), under the floor trim. The high-voltage battery is separate — never touch its orange cabling.
Is it safe to disconnect the 12 V on an EV?
Yes — the 12 V is separate from the high-voltage system. Just don’t touch the orange HV cabling.
Which terminal first?
Negative (−) earth off first, reconnect it last; wait at least 10 minutes before airbag work.
Do I need to code the new battery?
A like-for-like swap works; registering it to the energy manager needs Porsche diagnostic equipment.
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.
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