Functional Safety for eMobility: What Specialty Vehicle and Off-Road OEMs Need to Know Before It Is Too Late
For over a decade, the conversation around functional safety in electric and electronic systems has largely focused on passenger car programs. Meanwhile, many manufacturers of specialty vehicles, utility trucks, and off-road equipment are now integrating advanced electrical systems for the first time—often without realizing how dramatically the safety compliance landscape has evolved.
Consider a manufacturer developing a battery-electric utility truck. After years of engineering work, the company successfully builds an electric platform featuring:
•Battery management systems
•Regenerative braking
•Advanced inverter controls
•Electrified powertrain components
The engineering team validates performance, and the vehicle appears ready for customer trials.
However, during supplier qualification, a fleet customer requests documentation for the functional safety development process, including:
•Hazard Analysis and Risk Assessment (HARA)
•Automotive Safety Integrity Level (ASIL) classification
•Functional safety concepts for braking and traction systems
If the manufacturer has not followed a structured functional safety process, these documents may not exist. As a result, customer approval is delayed, program timelines slip, and additional engineering work becomes necessary.
This scenario is becoming increasingly common across specialty vehicle programs, off-road equipment platforms, and emergency vehicle development programs.
Why Functional Safety Requirements Are Expanding Beyond Passenger Cars
Historically, the ISO 26262 functional safety standard primarily addressed electrical and electronic systems used in passenger vehicles.
This changed significantly with the 2018 revision of ISO 26262, which expanded its scope to cover a broader range of road vehicles—including trucks, buses, and specialty vehicles that rely on safety-relevant electronic systems.
At the same time, other safety frameworks have emerged for off-road machinery and industrial vehicles, reinforcing the importance of structured safety processes in electrified equipment.
However, many manufacturers outside the traditional automotive ecosystem have not fully adapted to these changes. Their development processes often evolved around mechanical systems, where safety risks were easier to control through physical design.
Electrification introduces new electronic failure modes that require systematic safety analysis.
Examples include:
•Battery system faults
•Electronic braking control failures
•Software errors in traction or power systems
•Faults in safety-critical control electronics
Without a structured functional safety process, these risks may not be adequately evaluated.
Why Passenger Car Functional Safety Approaches Do Not Always Apply
Although functional safety principles are universal, the way they are applied differs significantly between passenger vehicles andspecialty equipment manufacturers.
Unique Operating Environments
Passenger vehicles typically operate under predictable road conditions with a human driver capable of responding to warnings or system failures.
In contrast, specialty vehicles often operate in unique environments, such as:
•Utility trucks operating with elevated aerial platforms
•Emergency vehicles running stationary equipment
•Off-road machinery operating autonomously or in remote areas
Each of these environments requires customized hazard analysis and safety assessments.
Low Production Volumes
Passenger car manufacturers distribute development and compliance costs across hundreds of thousands of vehicles.
Specialty vehicle manufacturers may produce hundreds or thousands of units annually, meaning safety compliance must be managed carefully to remain economically viable.
Supplier Ecosystem Differences
Passenger car OEMs typically rely on Tier-1 suppliers with extensive ISO 26262 safety certification experience.
Specialty vehicle manufacturers frequently source electronic systems from industrial component suppliers who may not have developed products within formal automotive safety frameworks.
This creates additional engineering work to evaluate and document safety compliance.
What Functional Safety Actually Involves
At its core, functional safety is a structured risk management approach for electronic systems.
The process begins with identifying potential failure modes in electrical or electronic systems and evaluating their potentialconsequences.
Key steps include:
•Identifying hazards related to system failures
•Evaluating risk severity, exposure, and controllability
•Assigning an Automotive Safety Integrity Level (ASIL)
•Defining safety requirements and system architecture
•Verifying that safety mechanisms operate correctly
The outcome is a documented safety case demonstrating that the system was designed and validated to manage safety risks effectively.
This documentation is increasingly required by:
•Fleet operators
•Government agencies
•Certification bodies
•Insurance providers
Common Functional Safety Challenges for Non-Automotive OEMs
Manufacturers new to functional safety often encounter unexpected requirements during electrification programs.
Functional Safety Must Start During Concept Development
Functional safety cannot be added after the design is complete.
Hazard analysis and safety architecture decisions must be integrated early in the product development cycle, before system architecture and component selection are finalized.
Software Development Must Follow Safety Standards
Modern electrified vehicles rely heavily on embedded software.
Functional safety standards impose strict requirements for:
•Software architecture
•Coding standards
•Test coverage
•Verification and validation procedures
Organizations with traditional industrial software development processes may need significant adjustments.
Safety Compliance Must Continue After Production
Functional safety is not a one-time certification.
Any design change—such as:
•Hardware updates
•Software revisions
•Supplier component changes
—must be evaluated against the original safety case.
Manufacturers must therefore integrate functional safety management into engineering change processes.
How Manufacturers Can Build a Functional Safety Process
For specialty vehicle and off-road OEMs beginning their functional safety journey, a structured approach is essential.
Software Development Must Follow Safety Standards
Modern electrified vehicles rely heavily on embedded software.
Assess Current Engineering Processes
Organizations should begin by evaluating existing development practices against functional safety requirements.
This assessment identifies gaps in areas such as:
•Documentation
•development workflows
•software practices
•safety governance
Identify Safety-Critical Systems
Not every electronic system requires full functional safety treatment.
Hazard analysis determines which systems—such as braking, steering, or battery management—require structured safety development.
Establish Functional Safety Management
Functional safety requires clear organizational responsibility.
Manufacturers typically designate a Functional Safety Manager responsible for coordinating safety activities across engineering teams.
Integrate Safety into Product Development
Functional safety activities must be embedded within the existing development lifecycle rather than treated as a separate compliance effort.
Manage Supplier Safety Compliance
Procurement teams must ensure that electronic components sourced from suppliers provide sufficient safety documentation to support the overall vehicle safety case.
Why Functional Safety Matters for eMobility Programs
As electrification expands across the mobility sector, safety expectations from regulators and customers are increasing rapidly.
Manufacturers that implement functional safety early will benefit from:
•Faster customer qualification
•Reduced product liability risk
•More predictable development timelines
•Stronger engineering processes
Organizations that delay adoption often face costly program delays and compliance challenges.
How Jaydu Supports Functional Safety in eMobility Programs
At Jaydu, our eMobility and functional safety engineering teams support manufacturers developing electrified platforms for:
•Specialty vehicles
•Utility trucks
•Industrial equipment
•Off-road machinery
Our services include:
•Functional safety assessments
•Hazard analysis and risk assessment (HARA)
•ASIL classification and safety concept development
•Integration of safety processes into engineering workflows
We help manufacturers build scalable functional safety capabilities that align with their product complexity and production volumes.
Conclusion
Electrification is transforming the vehicle and equipment industries. With this transformation comes increased reliance on electronic systems that must be designed with safety as a fundamental requirement.
For specialty vehicle and off-road equipment manufacturers, functional safety is no longer optional—it is becoming a core requirement for market access and risk management.
Organizations that adopt structured functional safety processes today will be better prepared for the evolving expectations of customers, regulators, and the broader mobility ecosystem.
