Automotive FAQ (EN)
Frequently asked questions about the automotive domain: regulation, technology, type approval and software development.
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What is the difference between EU Whole Type Approval (WTA) and small series approval?
EU Whole Type Approval (WTA) applies to vehicles produced in large series and requires verification of conformity with all applicable UN Regulations and EU Directives, carried out by a type approval authority in one EU Member State. Small Series National Type Approval (SSTA) applies to reduced annual production volumes and allows simplified technical requirements. Regulation (EU) 2018/858 defines the thresholds and criteria for both procedures.
What does Regulation (EU) 2023/851 on the 2035 ICE ban require?
Regulation (EU) 2023/851 (amending Reg. (EU) 2019/631) establishes that, from 2035, new M1 and N1 vehicles registered in the EU must have zero CO2 tailpipe emissions measured under the WLTP test cycle. This means only BEVs and FCEVs will be compliant; traditional ICE vehicles cannot be sold as new in the EU. An exemption is under consideration for vehicles running exclusively on synthetic carbon-neutral e-fuels, subject to technical verification.
How does the WLTP test cycle work and why is it more accurate than NEDC?
The WLTP cycle (UNECE GTR 15) simulates real driving conditions across four phases (Low, Medium, High, Extra High) with higher speeds and a more dynamic driving profile than NEDC. It also accounts for equipment options that affect vehicle weight and aerodynamics. WLTP CO2 results are typically higher than NEDC by an estimated 20-30% (indicative, source: ICCT 2020), making them more representative of real-world use.
What is RDE and how does it complement WLTP?
RDE (Real Driving Emissions) measures NOx and particulate (PN) emissions under real on-road driving conditions using a PEMS (Portable Emission Measurement System). RDE complements the laboratory-based WLTP: a vehicle must satisfy both WLTP limits in the laboratory and RDE limits on the road (with a conformity factor "CF" defined by Regulation (EU) 2017/1151).
Which ADAS systems are mandatory on new EU vehicles from 2022?
EU Regulation 2019/2144 mandated several ADAS for new models type-approved from July 2022: ISA (Intelligent Speed Assistance), AEB (Autonomous Emergency Braking), LDW (Lane Departure Warning), driver attention monitoring, driver drowsiness warning, reversing detection, Traffic Sign Recognition (TSR), Event Data Recorder and pre-installation for alcohol interlock. Additional requirements apply from July 2024 for vehicles already in production.
How does C-V2X communication work and how does it differ from ITS-G5?
C-V2X (3GPP Rel. 14 LTE-V2X, then Rel. 16 5G-NR-V2X) uses cellular infrastructure and the PC5 sidelink channel for direct vehicle-to-vehicle low-latency communications. ITS-G5 (ETSI EN 302 663) is based on IEEE 802.11p and operates in the 5.9 GHz band with a dedicated ad-hoc channel. C-V2X can leverage cellular network coverage for V2N communications; ITS-G5 does not depend on network infrastructure. In Europe, EU Delegated Decision 2019/985 initially supported ITS-G5 but was annulled by the CJEU (2020), leaving the technology choice to Member States and industry.
What does UNECE Regulation 155 (UN R155) require for automotive cybersecurity?
UN R155 requires OEMs to implement a certified CSMS (Cybersecurity Management System). The CSMS must cover the entire vehicle life cycle: risk identification, mitigation measures, threat monitoring and incident management. New vehicle types must comply from August 2023 in the EU; vehicles already in production from July 2024.
How is a vehicle recall managed in Europe?
The manufacturer must notify the defect to the type approval authority within 10 days of discovery (Reg. (EU) 2018/858 Art. 11). The recall plan must be approved by the authority. The manufacturer contacts owners of affected vehicles and provides the repair free of charge. Member State authorities monitor recall effectiveness. The European Safety Gate database (formerly RAPEX) collects notifications for dangerous products including vehicles.
What is the BEV battery lifecycle and how is degradation monitored?
The lifecycle of a lithium-ion battery is influenced by: number of charge/discharge cycles, depth of discharge (DoD), temperature, and charging rate. The BMS continuously monitors SoC and SoH. Degradation reduces actual capacity (kWh) and thus driving range. The EU Batteries Regulation (EU) 2023/1542 introduces durability requirements and SoH transparency obligations for EV batteries.
What is the structure of the automotive supply chain?
The automotive supply chain is organised pyramidally: OEM at the apex, Tier 1 (complete system suppliers), Tier 2 (component suppliers), Tier 3 (raw materials and basic components). Tier 1 suppliers manage key modules (e.g. braking system, cockpit, powertrain). Quality is governed by IATF 16949 and customer-specific requirements (CSR). OEM–Tier 1 relationships are governed by contracts with defined PPAP and SLA.
How is TCO calculated for an electric vehicle versus a combustion vehicle?
TCO compares total costs over the useful life. For a BEV: typically higher purchase price, lower energy costs (cost per kWh vs. fuel cost), reduced maintenance (no oil changes, less brake wear due to regenerative braking), tax benefits (e.g. VED exemption in the UK, insurance subsidies). Residual value depends heavily on battery SoH. The break-even point varies based on local energy costs and annual kilometres driven.
What does ASIL D mean under ISO 26262?
ASIL D is the highest safety integrity level defined by ISO 26262 for E/E systems in vehicles. It is assigned to functions where the combination of potential harm severity (S3 = fatal), exposure to the hazardous event (E4 = high) and controllability (C3 = difficult to control) is at its maximum. Examples: electronically controlled steering and braking. Requires extremely rigorous development and verification processes, with thorough failure analysis (FMEA, FTA).
How does an OTA update work and what security risks does it carry?
An OTA (Over-The-Air) update transmits new ECU software versions via mobile network or Wi-Fi. UNECE Regulation 156 (UN R156) requires a SUMS (Software Update Management System) to ensure authenticity, integrity and rollback capability of updates. Risks include: man-in-the-middle attacks, malicious firmware injection, security update downgrade. The CSMS (UN R155) must cover the OTA attack vector.
What are the main V2G communication standards?
Vehicle-to-Grid (V2G) relies on ISO 15118 for digital communication between vehicle and charging point, including Plug&Charge (automatic authorisation) and charge/discharge profile management. The physical layer uses the CCS2 connector (IEC 62196-3) with Power Line Communication (PLC). Regulation (EU) 2023/1804 (AFIR) includes provisions for smart charging and V2G.
How is a fleet management system structured?
A fleet management system integrates: telematics (GPS + OBD data via SIM), fleet monitoring software (location, consumption, maintenance), fuel card management, maintenance scheduling, TCO reporting and regulatory compliance (digital tachographs for larger N vehicles under Regulation (EU) 165/2014, GDPR for driver location data).
What is a Digital Twin in the automotive context?
A Digital Twin is a virtual replica of a vehicle, plant or component, updated in real time by data from physical sensors. In automotive it is used for: virtual product development (reducing physical prototypes), operational fleet monitoring, failure simulation for predictive maintenance, and homologation model updating.