BYD ACT 3 (YUAN PLUS) 2025: COMMON PROBLEMS, SOLUTIONS, AND ADVICE

✅ 2025 Overview: Versions, Strengths/Weaknesses

The BYD Atto 3 (known as Yuan Plus in several markets) is a BEV crossover with a single front motor and a "Blade" LFP battery. Strengths: spaciousness, safety features/ADAS, efficiency in urban use. Recurring limitations: 12V battery reliability , climate control/infotainment software bugs , and limited service network in some European countries. Internal insights: analysis of the most common problems and BYD's service network.

MCEVKELN EV Charger Type 2 – 3.6KW

Portable charging cable Type 2 Schuko 5M, power 3.6KW with 6-16A switch box. Compatible with IEC 62196-2, ideal for electric and plug-in hybrid cars.

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🔧 Main problems with BYD Act 3 / Yuan Plus (2025 update)

Collection of the most reported critical issues by the workshop network and owners in 2024-2025, with a focus on the 12V battery, air conditioning, infotainment, recalls and energy management.

1) 12V battery: repeated discharges and sudden blockages

• Typical symptoms: car that won’t “start” (locked system), random error messages, need for 12V boost or towing.
• Common causes: Undersized 12V capacity and suboptimal DC-DC management; accelerated discharge after prolonged stops or with very low traction SoC.
• Quick fixes: Software/DC-DC updates, 12V battery replacement with a quality unit and periodic checks; prevent leaving SoC traction ≥30% and plugging the car in during long stops.

Internal data: "8 blocks in 15 months" reported on Act 3; high number of cases within 24 months.

2) Air conditioning / heat pump: cold air and “wrong” temperature

• Symptoms: Cold air even with the temperature set to 24°C; need to set the temperature several degrees higher for real comfort.
• Causes: HVAC software bugs and initial calibrations that are not final.
• Solutions: OTA (or in-store) HVAC update , parameter reset, cabin filter/sensor check; pre-conditioning via app in winter.

Internal analysis: High frequency of reports regarding Act 3; updates have mitigated the problem.

3) Infotainment / DAB‑FM radio / connectivity

• Symptoms: DAB slow or not working, FM unstable, Bluetooth disconnecting, CarPlay/Android Auto intermittent.
• Causes: Software instability and, in some cases, a faulty CPU .
• Solutions: Firmware update, certified data cable , head-unit replacement when necessary.

In case of a faulty head unit, the indicated replacement range is €800-1,200.

4) Recall 2024: Power steering control unit (Yuan Plus/Act 3)

• Subject: Recall campaign on cars produced 2022-2023 due to a defective EPS control unit with fire risk .
• What to do: Check the VIN with the official BYD network and ensure the campaign is applied; the service is free .

Internal Dossier: Recall of ~97,000 cars, including Yuan Plus (Act 3).

5) Energy management and charging: standby consumption and best practices

• Symptoms: loss of charge when the vehicle is stationary (“standby drain”), reduced efficiency at extreme temperatures.
• Cause: Active onboard processes and non-optimized thermal management/balancing in early software batches.
• Solutions/prevention: schedule charging and pre-conditioning , avoid long stops with low SoC, periodically update the software.

Analysis: Standby power consumption of 5-8%/week reported in multiple cases; updates reduce impact.

6) Rear noises / finishes

• Symptoms: A metallic clicking noise from the rear on rough surfaces; some criticism of the readability of the driver's display.
• Causes: Fixings/soundproofing requiring inspection; perceived quality varies between batches.
• Solutions: Check tightening and sealing; any noise-reducing pads ; check local TSBs.

Notes collected summer 2024 on Act 3.

7) Assistance and maintenance network

• Critical issues: response times are sometimes slow and network coverage is uneven in Italy and the EU; spare parts availability needs to be verified.
• Advice: Plan interventions, document symptoms with photos/videos, request campaign verification and software updates.
• Note: The Seal U plug-in may have much shorter maintenance intervals (oil, battery coolant) than a pure EV. This does not apply to Atto 3, but is useful as a range comparison.

BYD's internal network and maintenance collection; focus on Seal U for comparison.

MOTOPOWER MP00207-FR – 6V/12V 4A battery charger

Intelligent and automatic battery charger with maintenance and recovery modes. Compatible with 6V and 12V batteries, safe and efficient.

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🧭 Practical advice for maintenance and purchasing

When it's convenient Act 3

• Light urban/extra-urban use, frequent charging and the possibility of parking in a garage with a socket.
• Those looking for low running costs but are willing to take care of software updates and 12V checks.

Checklist before buying (new/used)

• Check recall campaigns performed (EPS) and OTA HVAC/infotainment history .
• 12V health check (load test) and correct DC-DC operation.
• Road test paying attention to rear axle noise and DAB/CarPlay connectivity stability.
• Evaluate the assistance network in your area and replacement times.

❓ Frequently Asked Questions

🏁 Conclusions

Understanding recurring issues (12V, HVAC/infotainment, EPS recall) and taking preventative action helps limit costs and inconvenience. If followed through with targeted updates and checks, the BYD Atto 3 remains an attractive proposition for everyday electric use.

Having doubts about your BYD? Contact us: we'll check for campaigns , updates , and compatible spare parts for your chassis.