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Toyota bZ4X engine: faults and reliability

Toyota bZ4X: e-Axles eléctricos delantero and trasero and baterías de 57,7 a 73,1 kWh · Toyota

In Europe, the sources consulted document no faults in the bZ4X’s electric system: the known European campaigns concern the wheels (2022), the heat pump compressor and the instrument cluster. The only relevant issue is a 2026 battery software fault, whose arrival in Europe is not confirmed.[1][2][3][4]

Risk index
11
Low risk · what it is
Documented faults
1
1 of high or critical severity
Timing
—
Technical data[1][5][6]
Production
since 2022
1 model on this site

8 sourcesHow we work

Which Toyota bZ4X versions should you buy?

Our verdict for each version, based on the documented faults.

Buy: No known serious faults, or they have already been corrected, in this version. With caution: Worth buying if something specific is verified: history, a replaced part or a completed campaign. Avoid: High risk of a serious fault that is hard to check for or prevent.

Known faults of the Toyota bZ4X

Sorted from most to least important (severity × frequency).

  1. 1High severityFrequency: RareTraction batteryHigh-voltage battery control unit software fault: loss of tractionIn 2026 Toyota recalled the bZ4X (bZ in the US) built between 2025 and 2026 because of a software fault in the high-voltage battery control unit, which can cut the traction system while driving. It is fixed with an update. We have found no confirmed European campaign.

Severity colours: low, medium, high, critical. How we rate them

By part

Compare each fault with the same part on other engines: symptoms, cost and affected models.

Symptoms of these faults

What the Toyota bZ4X is

The bZ4X is the first electric car in Toyota’s ‘bZ’ series. Production began in April 2022 and European deliveries in the summer of that year; Wikipedia indicates manufacture in Japan and China.[5]

Until 2025 it was sold with a 71.4 kWh battery and front-wheel drive (204 hp, one 150 kW motor) or all-wheel drive (218 hp, two 80 kW motors). The 2025 facelift adds a 57.7 kWh entry battery (167 hp) and a 73.1 kWh one (224 hp; 343 hp all-wheel drive).[1][5][6]

Manufacturer
Toyota
Type
Electrical
Engine
Motor eléctrico delantero (e-Axle) en tracción delantera; un segundo e-Axle trasero en tracción total. Las fuentes no precisan el tipo de motor
Battery
57.7–73.1 kWh
Power
167–343 hp
Peak torque
338 Nm
Production
since 2022
Makes
Toyota

Technical data[1][5][6]

What changed between versions

  1. 2022–2025

    bZ4X front-wheel drive, 204 hp (2022-2025)

    One front electric motor (e-Axle 1XM of 150 kW and 266 Nm according to Wikipedia) and a 71.4 kWh battery. This is the entry version of the original bZ4X, which arrived in the summer of 2022.[5][6]

  2. 2022–2025

    bZ4X all-wheel drive, 218 hp (2022-2025)

    Two electric motors (e-Axles of 80 kW each, 160 kW in total and 338 Nm according to Wikipedia), one per axle, with the same 71.4 kWh battery.[5][6]

  3. since 2025

    bZ4X facelift: 57.7 and 73.1 kWh, 167-343 hp (2025-present)

    The 2025 facelift offers a 57.7 kWh battery (167 hp, front-wheel drive) and a 73.1 kWh one (224 hp front-wheel drive and 343 hp all-wheel drive), with new motors.[1][5]

Cars fitted with the Toyota bZ4X

1 model sold in Europe. Open each one to see all its faults and the buying checklist.

Toyota

  • Toyota bZ4XbZ4X 204 CV · bZ4X AWD 218 CV · bZ4X 167 CV · bZ4X 224 CV · bZ4X AWD 343 CVsince 2022[1][5][6]

Compare the Toyota bZ4X

Maintenance parts for the Toyota bZ4X

The parts replaced at services and when the timing belt or chain is changed, searched for this engine. Confirm the part number with the registration plate or VIN.

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Are you buying a car with the Toyota bZ4X?

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Do you have a car with this engine? Tell us which faults you have had, at how many kilometres and how much you paid. Report your fault.

Sources

Every fact on this page links to its source. If you find an error, let us know.

  1. Fiabilité Toyota bZ4X: pannes et avisfiches-auto.fr · Motoring press · consulted 30 October 2026 · in French
  2. Toyota bZ4X: Rückruf, Autobauer bietet Rückkauf ansparneuwagen.de · General press · published 4 August 2022 · consulted 30 October 2026 · in German
  3. Toyota bZ4X: Probleme mit der ECUÖAMTC · Consumer association · published June 2024 · consulted 30 October 2026 · in German
  4. Recall de 21.000 coches eléctricos de Toyota, Lexus y Subaru en EE. UU.electrive.com (edición en español) · Motoring press · published 30 June 2026 · consulted 30 October 2026 · in Spanish
  5. Toyota bZ4XWikipedia (inglés) · Other source · consulted 30 October 2026
  6. Toyota bZ4X (EAM1) 2022-2025: variantesADAC Autokatalog · Technical documentation · consulted 30 October 2026 · in German
  7. Toyota bZ4X recalled (Australia)CarExpert · Motoring press · published 19 June 2026 · consulted 30 October 2026
  8. Toyota recalls nearly 21,000 electric vehicles over battery control unit software issueautoevolution · Motoring press · published June 2026 · consulted 30 October 2026