BMW GS 95024-2-1 Electrical and Electronic Components in Motor Vehicles - Electrical Requirements and Tests

The “BMW GS 95024-2-1 Electrical and electronic components in motor vehicles - Electrical requirements and tests” standard, developed by BMW, a multinational vehicle manufacturer, describes the requirements, test conditions, and test methods for electrical, electronic, and mechatronic components and systems to be used in motor vehicles up to 3,5 tons. Additional or different requirements, test conditions, and tests should be defined in the relevant component performance specifications. The tests described here are not used to assess component suitability or the suitability of the production process.

The BMW GS 95024-2-1 standard focuses on ensuring the reliability, safety, and performance of electrical and electronic systems under various electrical voltages and electromagnetic conditions. This standard is part of BMW's broader suite of specifications for automotive components. It is widely used by suppliers and test laboratories in verifying parts for BMW vehicles.

The BMW GS 95024-2-1 standard primarily addresses the following:

• Electrical tests: Including short circuits, on/off cycles, voltage variations, and load simulations to evaluate durability and fault tolerance.
• Electromagnetic compatibility (EMC) testing: This covers emissions (how much interference a component produces) and immunity (how well it withstands external electromagnetic interference). This is critical to preventing malfunctions caused by sources such as radio signals, nearby electronic devices, or vehicle systems.

The specific tests mentioned in the relevant documentation are as follows:

• Various electrical stress scenarios.
• Short circuit simulations in signal and load circuits.
• Repeated on/off cycle tests to evaluate long-term reliability.
• Electromagnetic vulnerability assessments to identify weak points.

Modern vehicles rely heavily on electronic control units (ECUs), sensors, infotainment systems, and advanced driver assistance features. Failures due to electrical or electromagnetic problems can lead to safety risks, recalls, or performance issues. Compliance with the BMW GS 95024-2-1 standard helps manufacturers in the following areas:

• Identifying security vulnerabilities in the early stages of development.
• To ensure that components integrate seamlessly into BMW's vehicle architectures, including electric and hybrid models.
• Meeting strict safety and regulatory requirements.

Advanced testing laboratories provide accredited services for this standard, using specialized equipment for electrostatic discharge (ESD), overvoltage, and immunity simulations.

This standard remains a cornerstone of automotive electronics validation. It underscores BMW's commitment to robust, interference-resistant electronics in its vehicles.

The BMW GS 95024-2-1 standard is BMW's internal standard for electrical requirements and testing of electronic components in motor vehicles (specifically 12V/24V systems). It focuses on simulating real-world electrical voltages, overvoltages, interruptions, and other electrical disturbances to ensure component reliability and fault tolerance.

This standard is derived from the German original equipment manufacturer standard LV 124. BMW adopted the electrical tests of LV 124 largely unchanged but structured them under the GS 95024 series. The GS 95024-2-1 standard covers electrical tests (equivalent to the LV 124 standard tests).

The main electrical test methods referenced in the BMW GS 95024-2-1 standard are as follows:

• E-01 - E-03: Basic operating voltage ranges and long-term overvoltage (simulates normal and high battery voltages).
• E-04 / E-05: Short interruptions and temporary malfunctions in the supply lines.
• E-06 - E-10: Voltage drops, sudden voltage drops, and overlapping alternating voltages (e.g., surges originating from the alternator).
• E-11: Starting pulses and cranking voltage curves (simulates engine starting conditions, including low voltage pulses).
• E-12 - E-14: Jump-start protection, reverse polarity protection, and overvoltage protection (e.g., starting a 12V system with a 24V jump start).
• E-15: Grounding deviation and reference grounding shifts.
• E-16 - E-18: Open circuit tests (single/multiple line interruptions).
• E-19 - E-22: Short circuits in signal/load circuits (to battery, ground, or between lines).
• E-23 / E-24: Repeated on/off switching cycles (on/off duration test to evaluate long-term reliability under frequent power cycling, components are switched on and off intermittently for extended periods).

Additional common tests include:

• Short-circuit tolerance (signal and control circuits).
• Load unloading simulations (suppressed/unsuppressed pulses resulting from alternator disconnection).
• Pin interruption and interconnection tests.

These tests are performed while the component is in operating mode, monitoring for failures, resets, or damage. Acceptance criteria require the absence of permanent failure and the restoration of full functionality.

The BMW GS 95024-2-1 standard primarily covers electrical voltages. The tests defined in this standard generally combine these with environmental tests from the BMW GS 95024-3-1 standard.

For many years, our organization, with its competent and experienced staff, has been understanding the needs of its customers, providing the advanced testing services they require, and assisting in the establishment, implementation, and improvement of management systems. Within this framework, we also provide testing services to businesses in accordance with the "BMW GS 95024-2-1 Electrical and electronic components in motor vehicles - Electrical requirements and tests" standard.