These instructions apply to the Infiniti Q60 (V37) 2017-2024.
For other models, please choose your vehicle here.
Disconnecting the 12 V battery on your Infiniti Q60 (V37, 2017–2024) is something most owners face sooner or later — fitting a fresh battery, laying the car up for winter, carrying out electrical work, or safely isolating power before working anywhere near the airbags or seat-belt pretensioners. The Q60 is a well-equipped sports coupe, so the job itself is simple but the aftermath needs attention: several convenience systems lose their learned settings the moment power is cut and must be re-taught. This guide covers doing it cleanly and getting everything back to normal.
Find the Battery First
On the Q60 the 12 V battery sits in the engine compartment, under a cover. There is usually a moulded plastic battery cover panel that lifts or unclips to expose the two terminals — the same panel Infiniti fits across the related Q50 saloon. Lift it off first so you can see what you are working on. Before you touch anything, note your radio presets and the date/time, because they won’t survive the power cut.
What You’ll Need / Before You Start
- A 10 mm spanner or socket for the terminal clamps (the most common size; check yours).
- A small wire brush or terminal cleaner if the posts look corroded.
- Eye protection and gloves — a lead-acid battery contains acid and can vent gas, so keep sparks and flames away and work in a ventilated spot.
- A note of your radio presets, clock setting and saved preferences.
- Optional: a 12 V memory saver — a small device that plugs into the OBD port or accessory socket and keeps a trickle of power on the electronics while the main battery is off. It can save you re-doing several of the relearns below, but only use one if you are certain you won’t be touching the airbag/SRS system, because it keeps that circuit live.
Safety note: if you are disconnecting in order to work around airbags or pretensioners, do not use a memory saver — the point is to remove power from those circuits. Disconnect properly and wait a few minutes for the system to de-energise.
Disconnecting Safely
- Turn the ignition fully off, take the key/fob well away from the car, and switch off all consumers (lights, climate, audio). On a keyless car, stepping a couple of metres away helps the system go to sleep.
- Lift the battery cover to expose the terminals and identify positive (+) and negative (−).
- Slacken and disconnect the negative (−) terminal first. Removing the earth first means that if your spanner brushes bodywork while you work on the positive side, there’s no live circuit to short. Tuck the loose lead aside so it can’t spring back onto the post.
- Now slacken and lift off the positive (+) terminal. Cover the bare post with a clean rag if leaving the battery in place.
- If removing the battery, undo the hold-down clamp at the base before lifting it out — keep it upright.
- Working near airbags or pretensioners? Wait several minutes after disconnecting so the SRS back-up capacitor fully discharges.
About the Battery Itself
The Q60 typically uses a Group 35 (BCI) size battery, and most are an AGM (Absorbed Glass Mat) type to suit the car’s electrical load. AGM and standard flooded batteries aren’t interchangeable for charging, so the safest rule is simple: read the label on the battery currently fitted and match it like-for-like — same size, same chemistry (AGM/EFB/standard) and the same or higher cold-cranking rating. A like-for-like replacement on this generation doesn’t usually require dealer coding, though where the car tracks battery state of charge, registering the new battery keeps the charging strategy correct. When in doubt, confirm against the figure on the original battery rather than guessing.
Reconnecting
- Make sure both terminals and posts are clean and dry. If you removed the battery, refit it and tighten the hold-down clamp first.
- Reconnect the positive (+) terminal first and tighten the clamp so it can’t rotate.
- Reconnect the negative (−) terminal last. A small spark as the circuit completes is normal.
- Check both clamps are tight (a loose earth causes intermittent electrical faults), then refit the cover.
- Switch the ignition on and let the systems wake before starting.
What to Re-initialise After Reconnecting
Because the Q60 carries plenty of body electronics, cutting power wipes a number of learned settings. Work through these once power is restored:
- Power windows (one-touch / anti-pinch) — the auto up/down and anti-trap function is the most common casualty and must be re-taught at the window’s travel limits. See our guide to initialising the Q60’s power windows.
- Tyre pressure monitor (TPMS) — the system can need the current pressures re-stored from the menu after a power loss so the warning light behaves correctly. Follow our Q60 TPMS reset procedure.
- Clock, date and radio presets — these reset to default; saved stations reload once you set them again.
- Audio / display preferences — the infotainment may relaunch with default brightness or balance; re-apply your settings from the menu.
Items such as a dead key-fob start, disabling start/stop, or replacing the fob cell are not affected by a battery disconnect and don’t need relearning here.
Troubleshooting
- Warning lights on after reconnection — a temporary TPMS or stability light is normal after a power cut and clears once the systems re-sync over a short drive.
- A light that stays on — usually a stored fault code; note which light it is and decode it before changing parts.
- Windows won’t auto-close — the one-touch function hasn’t been relearned; run the initialisation procedure linked above.
- Car cranks slowly or won’t wake — recheck both terminal clamps are tight and corrosion-free; a poor earth is the usual culprit.
- Clock keeps resetting itself afterwards — that points to a battery not holding charge or a loose connection, not the disconnect itself.
Frequently Asked Questions
Where is the battery on an Infiniti Q60?
In the engine compartment, under a plastic cover panel. Lift the cover to reach the two terminals.
Which terminal do I remove first?
Always the negative (−) first when disconnecting, and reconnect it last — positive (+) goes on first, negative last.
What needs resetting after I reconnect?
On the Q60 the power windows’ one-touch function and the tyre-pressure monitor commonly need re-initialising, plus the clock, date and radio presets.
What battery does the Q60 take, and does it need coding?
It commonly uses a Group 35 AGM battery, but the only reliable reference is the label on the battery currently fitted — match the size, chemistry and rating exactly. A like-for-like replacement on this era generally doesn’t need dealer coding.
Can I avoid losing my settings?
Yes — plug a 12 V memory saver into the OBD or accessory socket before disconnecting, so the electronics stay powered. Don’t use one if you are working on the airbag system, as it keeps that circuit live.
How long should I wait near the airbags?
Give it several minutes after disconnecting before working on airbags or seat-belt pretensioners, so the SRS back-up power fully discharges.
If a warning light stays on after reconnecting, look up the stored code on autodtcs.com.
Independent guide — not affiliated with Infiniti. Always follow your official service manual and safety precautions. Read our full disclaimer.