Why does my Aston Martin DBX keep getting a dead battery and warning lights?

Short answer: Most DBX battery and warning-light complaints come back to the 12V battery running low from sitting or short trips, which can also upset the 48V suspension and give a harsh ride. Keep it on a battery maintainer when parked, get the battery load-tested, and make sure recall 24V255000 (loose battery fuse box cables) is done. Warnings that come back with a good battery need a dealer.

Symptom: The DBX won't start after sitting, a suspension warning appears and the ride gets harsh, or a 'reduced performance' message shows after accelerating.

What to check first

1. Run your VIN at nhtsa.gov/recalls for 24V255000, 24V248000 and 26V200000.
2. Have the 12V battery load-tested. A load test puts a real demand on the battery. A plain voltmeter reading can look fine on a battery that can't deliver power.
3. Keep the car on a maintainer whenever it's parked for more than a day or two.
4. If the suspension warning appears after sitting, drive gently for a while and see if it clears.
5. Ask the dealer for stored codes if warnings return with a charged battery.
6. Keep a log of each event for warranty claims.

Likely causes

1. 12V battery drained from sitting or short trips. Owners say the DBX is very sensitive to battery charge. The 12V battery is the small battery that powers the computers, locks and screens. One owner's dealer said to keep it on a trickle charger and drive it at least 20 miles a day.
2. Low voltage affecting the 48V suspension system. The DBX uses a 48V system for its air suspension and active anti-roll bars, charged from the 12V side while running. Owners said low voltage can leave the ride harsh with a suspension warning until things recharge.
3. Loose cables in the battery fuse box (recall). Recall 24V255000 covers 2021-2024 DBX cars whose battery fuse box cables may be loose, which can stall the engine or cut headlights or power steering.
4. Intermittent engine or exhaust fault. One 2021 DBX owner had 'reduced performance, consult service' with no stored faults. The dealer checked the exhaust actuators and passed it to Aston Martin tech support.

What it usually costs

Owners in these threads were under warranty and didn't post prices. Recall work is free.

Is it safe to keep driving?

If the suspension warning is on, the ride and handling may be affected, so drive gently and get it checked. Recall 24V255000 says loose fuse box cables can stall the engine or cut headlights or power steering, so get that recall done before relying on the car.

DIY or shop?

Using a battery maintainer and testing the battery is DIY. Fuse box, suspension and engine diagnosis are dealer work.

Recalls, bulletins and complaints in plain words

• Related recalls: NHTSA lists 24V255000 (2021-2024 DBX: battery fuse box cables may be loose, which can stall the engine or cut headlights or power steering), 24V248000 (2021 DBX: front prop shaft and differential fasteners may loosen), 24V249000 (2023-2024 DBX707: oil cooler hose may burst), 26V200000 (2021-2026 DBX models: a rear suspension pin may slide out) and 20V784000 (2021 DBX: missing headliner foam). Check your VIN at nhtsa.gov/recalls. If your car is part of a recall, the dealer fixes it for free.
• 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. Very few DBX complaints are on file.
• NHTSA complaints: 0 keyword-matched complaints for Aston Martin DBX and DBX707 2021–2024 (of 1 unique complaints queried, NHTSA complaints API by model year, queried 2026-11-03; keywords: battery, dead, warning, reduced, suspension, power). This counts complaints that mention these words. It is not a defect finding.

What owners report

• In DBX Battery Issues on Reddit r/AstonMartin, an owner of a new DBX S picked up in January said it had been back to the dealer three times for battery problems, once towed out of the garage, and their 2023 DBX had battery issues too. The dealer said to keep it on a trickle charger and drive at least 20 miles every day.
• In DBX 707 Suspension light and warning message on Reddit r/AstonMartin, a DBX707 owner got a suspension warning and a 'very bumpy' ride. Replies said to charge the battery because it's likely low voltage. One said low 12V can drain the 48V system that runs the air suspension and anti-roll controllers, and a dealer's first question was whether the car had been sitting.
• In 2021 DBX reduced performance, consult service after accelerating. No errors or faults stored? on Reddit r/AstonMartin, a 2021 DBX owner got 'reduced performance, consult service' after accelerating. The dealer saw it once on a road test, found no stored faults, found the exhaust actuators OK, and handed it to Aston Martin tech support. The car was under extended warranty.

Quick tip

A maintainer is cheap insurance on this car. If it still dies on a maintainer, push the dealer to find the drain.

Vehicle focus: Aston Martin DBX, DBX707 and DBX S, 2021-2026.

Safety / mechanic note

Stalling or losing power steering or headlights is dangerous. Verify with a mechanic.