Overview
EN ISO 18541-3:2021 - "Road vehicles - Standardized access to automotive repair and maintenance information (RMI) - Part 3: Functional user interface requirements" defines the functional user interface (UI) requirements for vehicle manufacturers’ RMI systems. It standardizes how independent operators access repair and maintenance information via manufacturer portals, reflecting the use cases specified in ISO 18541‑1. The document is adopted by CEN (EN ISO 18541-3:2021) and supersedes the 2014 edition.
Key topics and requirements
- Scope: Functional UI requirements for vehicle manufacturer (VM) RMI systems to support standardized access for independent operators (IOs), covering light, heavy and two/three‑wheel vehicles as aligned with the ISO 18541 series and EC Mandate M/421.
- Principles: Requirements are performance‑based and avoid prescribing implementation details (BP1–BP4). They promote flexible navigational pathways and minimal impact to existing VM systems.
- Requirements clusters: The standard organizes UI requirements into clusters, including:
- Cluster 1 - Standardized access mode (e.g., [FREQ‑1] RMI access mode, [FREQ‑2] Registration and login support)
- Cluster 2 - Use cases map (e.g., [FREQ‑3] VM RMI system implemented use cases map, [FREQ‑4] Download area)
- Cluster 3 - Navigational pathway (e.g., [FREQ‑5] Navigational pathway from standardized use cases to VM‑specific entry points)
- Terminology & conventions: Defines terms such as artefact, and abbreviations like AR (authorized repairer), IO (independent operator), RMI, VCI, VM. Based on OSI service conventions.
Applications and practical value
- Standardizes how RMI web portals guide users from a common RMI home page into VM‑specific support artefacts, improving usability for independent repair shops and aftermarket service providers.
- Enables consistent features such as a standardized navigation option, clear use‑case mapping, download areas for technical documents, and supported login/registration flows.
- Helps software/UI designers, portal integrators and VM IT teams implement user interfaces that align with regulatory expectations and interoperability goals.
- Useful for regulators and procurement teams referencing compliance with EC Mandate M/421 and for third‑party tool vendors who rely on predictable navigation and access patterns.
Who should use this standard
- Vehicle manufacturers (VMs) designing or updating RMI portals
- Independent repairers and authorized repairers implementing workflows to access RMI
- Aftermarket software developers, UX designers, and system integrators
- Regulators, standard bodies and compliance officers
Related standards
- ISO 18541‑1 - General information and use case definition (primary reference for use cases used by Part 3)
- Other parts of the ISO 18541 series governing data and technical interfaces for RMI systems
Keywords: EN ISO 18541-3:2021, RMI, repair and maintenance information, standardized access, functional user interface requirements, independent operators, navigational pathway.