ISO 26262 is intended to be applied to safety-related systems that include one or more electrical and/or electronic (E/E) systems and that are installed in series production passenger cars with a maximum gross vehicle mass up to 3 500 kg. ISO 26262 does not address unique E/E systems in special purpose vehicles such as vehicles designed for drivers with disabilities.

Systems and their components released for production, or systems and their components already under development prior to the publication date of ISO 26262, are exempted from the scope. For further development or alterations based on systems and their components released for production prior to the publication of ISO 26262, only the modifications will be developed in accordance with ISO 26262.

ISO 26262 addresses possible hazards caused by malfunctioning behaviour of E/E safety-related systems, including interaction of these systems. It does not address hazards related to electric shock, fire, smoke, heat, radiation, toxicity, flammability, reactivity, corrosion, release of energy and similar hazards, unless directly caused by malfunctioning behaviour of E/E safety-related systems.

ISO 26262 does not address the nominal performance of E/E systems, even if dedicated functional performance standards exist for these systems (e.g. active and passive safety systems, brake systems, Adaptive Cruise Control).

ISO 26262-5:2011 specifies the requirements for product development at the hardware level for automotive applications, including the following:

• requirements for the initiation of product development at the hardware level,
• specification of the hardware safety requirements,
• hardware design,
• hardware architectural metrics, and
• evaluation of violation of the safety goal due to random hardware failures and hardware integration and testing.

The requirements of ISO 26262-5:2011 for hardware elements are applicable both to non-programmable and programmable elements, such as ASIC, FPGA and PLD. Furthermore, for programmable electronic elements, requirements in ISO 26262-6, ISO 26262-8:2011, Clause 11, and ISO 26262-8:2011, Clause 12, are applicable.