Why won't my Maserati Quattroporte start after it sits?

Short answer: Most Quattroporte no-starts after sitting are a worn-out 12V battery. If a tender doesn't revive it, replace it with the correct large AGM battery (it's in the trunk). Use a battery maintainer if the car sits.

Symptom: Nothing works: the key fob, radio and dash are dead or flicker. Or it clicks, or the dash lights up but the engine won't turn over.

What to check first

1. Check the fob battery first if only the fob is dead.
2. Charge the battery and load test it.
3. Know how to open the trunk without power (owners pointed to a hidden key slot) and where the jump points under the hood are.
4. Replace it with the correct AGM size and rating.
5. Use a maintainer if the car sits for a week or more.

Likely causes

1. Worn-out 12V battery. The 12V battery runs the starter and all the computers. Owners said a Quattroporte driven only on short trips or left sitting drains its battery, and an old one won't hold a charge even after a tender.
2. Wrong-size replacement battery. Owners said these cars need the big battery. Match the original size and rating.
3. Dead key fob battery. If the fob buttons do nothing, a dead fob battery is possible too.

What it usually costs

Owners didn't post prices in these threads. It's the price of a large AGM battery plus fitting if you don't DIY.

Is it safe to keep driving?

Once it starts reliably, yes. If the battery is weak, expect more warnings and no-starts.

DIY or shop?

Yes. Owners called the battery swap easy, and the sensor recalibrates itself.

Recalls, bulletins and complaints in plain words

• Recalls: NHTSA lists recall 17V046000 for certain 2014-2017 Quattroporte (a front seat adjustment issue), which isn't related to batteries. If your car is part of a recall, the dealer fixes it for free. Check your VIN at nhtsa.gov/recalls.
• Plain words: The complaint count below shows how often owners reported problems that mention these words to NHTSA. A count is not proof of a defect. NHTSA's recall lookup returned no data for 2019-2020.
• NHTSA complaints: 6 keyword-matched complaints for Maserati Quattroporte 2014–2020 (of 16 unique complaints queried, NHTSA complaints API by model year, queried 2026-11-04; keywords: battery, dead, won t start, no start, electrical, warning, stall, power) (NHTSA returned no data for 2 model-year queries). This counts complaints that mention these words. It is not a defect finding.

What owners report

• In Maserati Won’t Start on Reddit r/Maserati, a 2019 Quattroporte wouldn't start, the fob did nothing and the radio wouldn't turn on. It stayed dead even after a battery tender. The owner only drove it on short weekend trips. Replies said to replace the battery, which is in the trunk and easy to swap, and to check the fob battery.
• In Dead 2014 Quattroporte GTS Battery on Reddit r/Maserati, a 2014 Quattroporte GTS went dead after sitting in a garage for a week and a half. A jump powered the car but the engine wouldn't turn over. Owners explained the hidden key slot for the trunk and where to connect jumper cables under the hood, and an AGM H8 900 CCA battery was suggested.
• In 2020 Quattro porte battery replacement. on Reddit r/Maserati, a 2020 Quattroporte owner's battery wouldn't stay charged. Replies said it doesn't need to be registered: the battery sensor recalibrates itself, and start/stop may not work until it does. Use the right big battery.

Quick tip

Buy the correct large AGM battery and keep the car on a maintainer when parked.

Vehicle focus: Maserati Quattroporte, 2014-2020.

Safety / mechanic note

Disconnect the negative terminal first. Verify with a mechanic.