Vietnam to Require VCA Checks for Imported Heavy Trucks

From August 1, 2026, Vietnam will apply a new compliance requirement to imported N2 and N3 trucks, including both chassis and complete vehicles, by requiring VCA electrification compatibility testing. The change is relevant not only to truck exporters, but also to certification teams, procurement planners, delivery coordinators, and after-sales support functions, because it adds a new technical review point tied to CAN protocol version, HVIL interface, and OBD-II physical compatibility. For companies shipping into the market, the practical issue is no longer only product entry, but whether technical documentation, certification timing, and delivery arrangements can match the new rule.

What the new requirement confirms

According to the information provided, Vietnam’s Directorate for Standards, Metrology and Quality (STAMEQ) issued Circular No. 22/2026/TT-BKHCN on June 26. The notice requires that, from August 1, 2026, all imported N2 and N3 trucks, including chassis and complete vehicles, must pass VCA electrification compatibility testing.

The confirmed testing scope covers the onboard CAN bus protocol version under ISO 11898-2:2018, the high-voltage interlock loop (HVIL) interface, and the physical compatibility of the remote diagnostic port using OBD-II. The provided information also states that Chinese vehicle manufacturers exporting to Vietnam will need to add a VCA type-approval step.

Where the operational pressure is likely to appear

Export programs face an added certification gate

From an industry perspective, exporters of medium- and heavy-duty trucks are the first group likely to feel the effect, because the rule introduces an additional certification-related step before shipment or market entry can proceed smoothly. The main pressure points are likely to sit in model readiness reviews, technical file preparation, and coordination between engineering and export compliance teams.

What deserves closer attention is whether existing export configurations for N2 and N3 products already align with the specified CAN, HVIL, and OBD-II compatibility requirements. Where that alignment is not clearly documented, companies may need to review technical specifications, supporting test materials, and product configuration consistency before delivery commitments are finalized.

Procurement and delivery planning may need earlier locking

For procurement and supply chain functions, the issue is less about policy interpretation and more about execution timing. If a vehicle now needs an added VCA-related approval step, order planning, production scheduling, and shipment booking may all require earlier confirmation. This is especially relevant where chassis imports and complete vehicle imports are managed through different internal workflows.

Analysis shows that companies involved in cross-border delivery will need to pay closer attention to document completeness, technical record availability, and any dependencies between certification progress and customs or handover arrangements. Even without further execution details, the rule creates a practical reason to recheck lead times and handoff points across the transaction chain.

Testing and after-sales functions may be drawn in earlier

Certification support providers, testing-related service teams, and after-sales technical units may also be affected because the required compatibility items are tied to interfaces and diagnostic access points that often matter beyond initial import clearance. In practice, these teams may need to support technical explanations, configuration confirmation, or consistency checks linked to the imported vehicle specification.

For market participants handling service preparation, the rule is also relevant because diagnostic-port compatibility and electrification-related interfaces can affect how products are documented, checked, and supported once they enter the market. The confirmed facts do not establish a final service requirement, but they do indicate that technical compliance and service readiness are becoming more closely connected.

What companies should review now

Check whether technical files match the stated interfaces

Companies exporting affected trucks should first review whether their existing technical files clearly describe the CAN bus protocol version, HVIL interface, and OBD-II physical compatibility referenced in the notice. Where product documents are incomplete or fragmented across suppliers, the compliance burden may increase even before formal testing begins.

Reassess certification sequencing for Vietnam-bound shipments

For businesses shipping to Vietnam, the practical question is whether the newly required VCA type-approval step for Chinese vehicle manufacturers has been built into internal approval flow, contract timing, and shipment planning. If not, teams may need to revisit how orders are scheduled and when a vehicle can be treated as ready for export delivery.

Watch for follow-up wording and execution practice

Observably, the provided information confirms the new requirement, but does not provide fuller execution detail on submission format, review process, or operational interpretation. That means companies should continue tracking later official wording, market implementation practice, and any procurement or tender documents that begin reflecting the new testing expectation.

Align supplier and service-side records in advance

Where vehicle systems, diagnostic interfaces, or electrification-related components involve multiple suppliers, companies may need to make sure supporting records can be traced consistently across the supply chain. This is not yet evidence of a defined enforcement outcome, but it is a reasonable compliance preparation step given that the rule is framed around interface compatibility rather than only a general product description.

Why this looks like more than a formal notice

Analysis shows that this development is best read as a concrete market-entry compliance signal rather than a purely abstract regulatory update. The reason is that the requirement is tied to specific technical compatibility points and a clear effective date of August 1, 2026. That gives the change direct relevance to certification workflow, export readiness, and delivery planning.

At the same time, it is also more appropriate to understand this as a rule change that still requires continued observation in execution. The provided facts confirm the requirement itself, but they do not settle how consistently it will be interpreted in review practice, how supporting documents will be checked, or how quickly procurement-side documents may adapt.

How the market is likely to read the change

In practical terms, this update should be understood as a confirmed compliance change with immediate planning implications for affected truck imports into Vietnam. It does not by itself prove a broader shift in every related business process, but it does set a new technical threshold that exporters and their partners cannot ignore once shipments fall within scope.

A neutral reading is that the rule matters most where companies rely on stable delivery windows, repeatable certification routines, and consistent technical documentation. The near-term task is not to overstate its effect, but to recognize that certification, documentation, and delivery coordination are now more tightly linked for the affected products.

Basis of this article and what still needs verification

This article is generated on the basis of the user-provided news title, event date, and event summary. For developments of this kind, commonly relevant source types may include official notices, releases by regulatory authorities, customs or trade administration information, industry association materials, standard-setting documents, and reporting by authoritative trade media.

No specific official source link was provided in the input, so the exact link still requires follow-up verification. Observably, the areas that still merit continued attention include detailed implementation language, certification interpretation in practice, changes in tender or procurement documents, industry feedback, and how affected companies carry out compliance and delivery arrangements after the rule takes effect.