Toyota/Subaru EV 12-Volt Battery Alert (Short)

We are investigating reported concerns involving 2023–2025 Toyota bZ4X and Subaru Solterra electric vehicles related to repeated 12-volt auxiliary battery failures, which may leave vehicles unable to start or operate. If your vehicle is affected, you may contact us confidentially and free of charge. No lawsuit has been filed, and no class proceeding has been certified.

Toyota/Subaru EV 12-Volt Battery Investigation (Detailed)

Our firm is reviewing reported concerns involving 2023–2025 Toyota bZ4X and Subaru Solterra electric vehicles and the failure or rapid drain of the 12-volt auxiliary battery. Owners have described situations in which the 12-volt battery drains prematurely—even after recent replacement—leaving the vehicle without power and unable to start or function normally.

If you have experienced multiple 12-volt battery failures, unexpected power loss, or situations where your vehicle became inoperable due to 12-volt battery issues, you may contact us confidentially and free of charge. No lawsuit has been filed, and no class proceeding has been certified.

Potential Automotive Class Proceeding Under Investigation:
Toyota bZ4X & Subaru Solterra 12-Volt Battery Issues (Main)

Our firm is currently investigating a potential multi-jurisdictional (Canada-wide) class proceeding in British Columbia concerning reported concerns affecting the following electric vehicles:

• Toyota bZ4X (2023–2025)
• Subaru Solterra (2023–2025)

Owners report that the 12-volt auxiliary battery—which powers essential electronic systems and enables the vehicle to start—may drain much sooner than expected, leading to loss of power, dashboard warning lights, and in some cases, complete inoperability.

According to multiple consumer complaints and court filings, many affected vehicles have required multiple 12-volt battery replacements within short mileage periods, and replacement batteries often fail again without a clear permanent fix. Unlike the high-voltage propulsion battery, the 12-volt battery should normally last several years in service.

To date, no recall or technical service bulletin has been publicly issued in Canada specifically addressing the root cause of these auxiliary battery failures in these models. Reported remedies to date appear limited to battery replacement, which owners report may not prevent recurrence.

This investigation is ongoing and is being conducted to determine whether the legal requirements under British Columbia’s Class Proceedings Act are met, including whether common issues exist and whether a class proceeding would be the preferable procedure.

If you own or lease a 2023–2025 Toyota bZ4X or Subaru Solterra and have experienced persistent 12-volt battery drain, failures, or related operational issues, you may contact us to share your experience. Providing information is confidential, free of charge, and does not obligate you to retain counsel or participate in any legal proceeding.

This page will be updated as the investigation progresses.
This webpage is provided for informational purposes only and does not constitute legal advice.

Frequently Asked Questions – Toyota bZ4X & Subaru Solterra 12-Volt Battery Investigation

What issue is being investigated?

We are reviewing reports that certain 2023–2025 Toyota bZ4X and Subaru Solterra electric vehicles may experience premature 12-volt auxiliary battery drain or failure, which can lead to loss of power and vehicle inoperability.

Has a class proceeding been filed?

No. At this time, we are conducting a preliminary investigation only. No Notice of Civil Claim has been filed and no class proceeding has been certified in British Columbia or elsewhere in Canada.

What does “certification” mean?

Certification is a procedural step where the court determines whether a lawsuit may proceed as a class proceeding. It does not decide liability or damages; it focuses on whether common issues exist and whether a class proceeding is the preferable method.

Which vehicles are included?

The investigation concerns 2023–2025 Toyota bZ4X and Subaru Solterra electric vehicles. The scope of affected vehicles may evolve as more information is collected.

Have Toyota or Subaru proposed a remedy?

Dealers may replace the 12-volt battery under warranty. However, based on consumer reports, replacement batteries have sometimes failed again without a permanent underlying remedy being identified. As of late 2025, no widely-publicized recall or technical service bulletin addressing the root cause has been issued.

How can I provide information?

If you own or lease a Toyota bZ4X or Subaru Solterra and have experienced repeated 12-volt battery failures, rapid drain, or related issues, you may contact us to share your experience. This is confidential, free of charge, and does not obligate you to participate in any legal proceeding or retain counsel.

Will I automatically be part of a class proceeding if one is certified?

If a class proceeding is certified, individuals who fall within the defined class are typically included automatically unless they choose to opt out, subject to the court’s order.