Thinking about buying a used BYD Atto 3 (2022–2023) in New Zealand? We've documented 9 known faults for this model spanning electrical, suspension, and interior. Each researched and verified before it's published. The most serious issues here are rated critical. Two are set out in full below — the rest, with the symptoms, repair costs and checks for each, are free with an account.
9
Documented faults
Critical
Most serious
$300–$900
Typical repair
3
Systems covered
Known BYD Atto 3 faults
Every fault below is documented specifically for this model — researched and verified before it’s published.
0112V Auxiliary Battery Failure Causing BMS Error and No-Start
CriticalOccasionalElectrical $300–$700 to fix
Early Australian BYD Atto 3 deliveries experienced failure of the 12V auxiliary battery, which powers vehicle control systems and the BMS independently of the high-voltage traction battery. When the 12V battery fails or drops below threshold voltage, the BMS throws error codes and the vehicle refuses to start or unlock even with the main battery fully charged. The 12V auxiliary battery on EVs has a harder duty cycle than on ICE vehicles as it is not recharged by engine alternator activity. Early examples used a battery with insufficient cycle rating. BYD issued a revised replacement specification for affected units.
Symptoms to notice
Vehicle refuses to start or unlock despite high-voltage battery being charged
BMS fault codes on the instrument display
12V system warning or low-voltage alert
Repeated need to reset the vehicle systems
What to check
Scan for 12V system voltage fault codes. Test the 12V auxiliary battery voltage and cold cranking amps with a battery tester. Check the build date and service history for any 12V battery replacement. Ask whether BYD has carried out any technical service bulletin work on the vehicle.
Where to look: 12V auxiliary battery, beneath boot floor or under bonnet depending on build date
Ask the seller
“Has the vehicle ever refused to start or unlock unexpectedly?”
“Has BYD replaced the 12V auxiliary battery under warranty?”
“Has any BMS or electrical fault code appeared?”
02Front Lower Control Arm Bushing Knock and Creak
MinorOccasionalSuspension $450–$1,100 to fix
A proportion of early BYD Atto 3 units delivered to Australia have exhibited front suspension knocking and creaking attributed to premature deterioration of the front lower control arm bushings. The issue presents as a knocking sound over potholes and expansion joints and a creaking sound when the suspension is compressed and extended slowly, such as when exiting a steep driveway. The rubber compound used in early-production bushings has shown accelerated hardening in Australian conditions. BYD warranty replacements have been carried out on confirmed units.
Symptoms to notice
Knocking from the front suspension over road imperfections
Creaking when the front suspension is fully compressed or extended
Noise changes character with steering angle
Clunk when traversing driveways or speed humps at low speed
What to check
Bounce each front corner firmly and listen for knocking or creaking from the suspension. Inspect the rubber element of the front lower arm bushings for cracking or distortion. Check for any BYD warranty service records relating to front suspension work. If a workshop inspection is possible: On a hoist, grab the front lower control arm and check for play in the bushings.
Where to look: Front lower control arm bushings, both sides
Ask the seller
“Has any knocking or creaking been noticed from the front suspension?”
“Has BYD replaced any suspension components under warranty?”
“Is the noise present on rough roads or when parking over driveways?”
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7 more documented faults on the BYD Atto 3
Symptoms, what to check, where to look and what to ask the seller — for every fault above. Free with an account, no card needed. One account covers one vehicle, so make it the car you’re actually looking at.
This page covers the model. Enter the plate of the actual car you’re looking at and see its year, engine, safety rating and register flags — free, no account needed.
Like any used car, it depends on the specific example and its service history. Across the 9 documented faults for the BYD Atto 3, the recurring problem areas are electrical, suspension, and interior. A BYD Atto 3 with a full service history and no signs of the issues listed on this page can be a sound buy but each one needs to be checked individually before you commit.
What are the most common problems with a used BYD Atto 3?
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We've catalogued 9 known faults for the BYD Atto 3, covering electrical, suspension, and interior. Two are written out in full on this page. The rest — with the symptoms to notice, what to inspect, and typical repair costs for each — are free once you create an account.
How much do repairs cost on a BYD Atto 3?
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Most single repairs on the BYD Atto 3 fall between $300–$900 at NZ independent-workshop rates. Some of the 9 documented faults cost less and a few cost considerably more, and no one car needs them all. Knowing which ones to look for before you view is what lets you negotiate the price down or walk away.
Should I get a pre-purchase inspection on a BYD Atto 3?
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Yes. A BYD Atto 3 inspection focused on its known weak points is the single best way to avoid an expensive mistake. KickTyres gives you a guided, model-specific inspection plus a market valuation and negotiation figure for $17.90 far less than the cost of missing one of the faults on this page.