Has an OBD diagnostic scan been performed on the high-voltage battery pack per the BYD India January 2026 service procedure, and what were the findings?

Request this answer in writing from the service advisor before authorizing repair work. The full playbook covers documentation procedures and post-service verification steps.

If a fault is detected, will the entire battery pack be replaced, or is a cell-level repair being proposed?

Request this answer in writing from the service advisor before authorizing repair work. The full playbook covers documentation procedures and post-service verification steps.

What is the warranty period that will apply to a replacement battery pack — does it carry the original pack's remaining warranty, or a new warranty term?

Request this answer in writing from the service advisor before authorizing repair work. The full playbook covers documentation procedures and post-service verification steps.

What is the part number of the replacement pack, and is it the updated-spec component?

Request this answer in writing from the service advisor before authorizing repair work. The full playbook covers documentation procedures and post-service verification steps.

Has this vehicle's battery been serviced or replaced previously, and is that history reflected in the BYD service records?

Request this answer in writing from the service advisor before authorizing repair work. The full playbook covers documentation procedures and post-service verification steps.

app / playbooks / BYD Seal — battery warning

high severity battery warning 2023—2025 dealer

BYD Seal battery warning (2023—2025)

BYD Seal · 2023—2025 · all trims

Diagnostic code reference

Reading codes off a BYD Seal service invoice? Look them up in our OBD-II DTC database →

Reported symptoms

High-voltage battery system warning illuminated on the instrument cluster
Reduced power, limp mode, or unexplained drop in available driving range
Charging session terminating early or reducing the maximum charge ceiling without explanation
OBD scan returns one or more Blade-battery cell-related fault codes during dealer diagnostic
Sudden reduction in displayed state-of-charge after a recent charging session
Notification from BYD or the dealer requesting a service visit for battery inspection

Questions to ask

Pose these to the service advisor at intake. Request answers in writing or via email.

Has an OBD diagnostic scan been performed on the high-voltage battery pack per the BYD India January 2026 service procedure, and what were the findings?
If a fault is detected, will the entire battery pack be replaced, or is a cell-level repair being proposed?
What is the warranty period that will apply to a replacement battery pack — does it carry the original pack's remaining warranty, or a new warranty term?
What is the part number of the replacement pack, and is it the updated-spec component?
Has this vehicle's battery been serviced or replaced previously, and is that history reflected in the BYD service records?
If the formal recall has not been issued in this market, what alternative classification (warranty, goodwill, paid service) is being applied to the work?

Documents to request

Each item should be received in writing before authorizing repair work.

Diagnostic report listing all stored, pending, and historical fault codes related to the high-voltage battery, BMS (Battery Management System), and thermal management systems
Battery pack inspection report including cell-level voltage data and OBD-scan results, with pass/fail determination against the BYD service criteria
Written warranty determination distinguishing recall coverage, battery warranty, extended coverage, and goodwill
Part number of any replacement battery pack installed, along with the warranty terms that apply to the replacement
Reference number of the recall campaign, service bulletin, or service action under which the work is performed

Pre-service evidence

Capture before drop-off. Once the vehicle leaves your possession, proving prior condition becomes significantly harder.

Photograph any battery, charging, or thermal warning lights on the cluster before drop-off
Record VIN (Vehicle Identification Number), odometer, current state of charge, and current displayed range estimate at drop-off
Document any unusual charging behavior — early session terminations, reduced charge ceilings, slow speeds — with dates and locations
Note prior battery-related service visits, even those classified as 'unable to reproduce' or routine inspections
If pickup-and-delivery service is offered (as in the BYD India recall procedure), retain documentation of vehicle hand-off and return condition

Service advisor interaction

Operational notes specific to the conversation at the service desk.

Record the service advisor's name and the date and time of each conversation
Note whether the visit is classified as recall, battery warranty, extended coverage, or goodwill — each has distinct downstream implications
If the dealership cannot confirm a recall flag against the VIN in markets outside India, request documentation of how the work is being classified
Document any reference to the BYD India January 2026 voluntary recall, including any statements about whether the same defect pattern has been observed in this market

Repair authorization

Cautions before signing.

Recall remedies are performed at no cost to the owner. If the work is being performed outside a formal recall, request written coverage classification before authorizing.
For battery pack replacement, confirm in writing the part number, the warranty period that will apply, and whether existing battery warranty terms transfer to the replacement
Repair authorization forms may include language permitting additional related work — read carefully and decline blanket scope additions
If the dealership proposes a partial repair or cell-level intervention rather than full pack replacement, request written documentation of the diagnostic basis and the deviation from the manufacturer-published remedy

Post-service verification

Complete before leaving the service location. Issues that surface after departure are operationally harder to attribute to the visit.

Verify battery system warnings have cleared after the service procedure and remain clear through a full ignition cycle
Confirm the displayed usable range and charge ceiling on the central display match values expected for the variant and pack capacity
Test a charging session — both AC (Level 2) and DC fast charging where available — before leaving the service location
Confirm the repair order matches the work performed and references the correct recall or campaign number
Note odometer reading, state of charge, and displayed range at pickup

Email templates

Documentation-focused templates for service correspondence. Tap copy to use. Subject and body are kept verbatim — paste them as-is into your email client.

pre-service inquiry

to: dealer service

Service inquiry — BYD Seal high-voltage battery, request for written diagnostic documentation

Service Department, I am bringing my [YEAR] BYD Seal, VIN [VIN], in for evaluation of the high-voltage battery in light of the BYD India voluntary recall (January 2026) addressing a potential cell-level Blade battery defect. Before authorizing any repair, I am requesting written confirmation of the following: 1. Whether this VIN is included in the recall in our market. 2. The OBD diagnostic procedure to be performed, including the cell-level criteria used. 3. Coverage classification for any work performed — recall, warranty, or other. 4. If replacement is required, the part number of the replacement pack and the warranty terms that will apply. Please reply to this email so the planned work scope is on record. Thank you, [NAME]

post-service follow-up

to: dealer service

Follow-up — written confirmation of battery service on [DATE]

Service Department, Following my appointment on [DATE] for VIN [VIN], I am requesting written confirmation of the following: 1. Fault codes recorded during the OBD scan. 2. Cell-level voltage data and pass/fail determination against the BYD service criteria. 3. Work performed, including any battery pack replacement and the part number installed. 4. Warranty coverage classification, including warranty terms for any replacement component. Please reply to this email at your convenience. Thank you, [NAME]

Warranty notes

The BYD India voluntary recall is performed at no cost to the owner, including pickup-and-delivery support in some markets. Charges presented in connection with this work should be confirmed in writing before authorization.
Replacement battery packs may carry warranty terms different from the original pack. Confirm in writing the warranty period that will apply to any replacement.
BYD has stated the defect is specific to the Seal and does not apply to the Atto 3, Sealion 7, or other models in the lineup. Records showing prior service history are relevant if the dealership questions inclusion in the recall.
Repairs performed under goodwill do not extend the warranty period. Confirm in writing whether work is classified as recall, warranty, or goodwill.

Observational patterns

The BYD Seal voluntary recall in India is administered as a free OBD diagnostic at authorized service centers, with full battery pack replacement provided if a cell-level defect is detected. Pickup-and-delivery support is offered in some service areas.

The recall scope is described as covering all Seal variants and both battery options. BYD has stated the defect does not extend to the Atto 3, Sealion 7, or other models in the lineup, supporting a Seal-specific (likely batch- or pack-integration-related) characterization.

Owners in markets outside India should monitor official local distributor communications. The cell-level defect is platform-relevant; whether and when the formal recall is issued in other markets is a distributor decision.

The BYD Blade battery uses LFP chemistry, generally regarded as stable and abuse-resistant. The recall does not invalidate that general profile; manufacturing variations or batch concerns can still surface in field service.

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