ECE R10: Series 07 EMC Testing, E-Mark, and Type Approval

ECE R10 is the United Nations regulation governing electromagnetic compatibility (EMC) for vehicles and their electronic components. It ensures a car’s electronics don’t interfere with nearby equipment and that outside electromagnetic energy doesn’t cause the vehicle to behave unpredictably.¹ The regulation operates under the 1958 Agreement administered by the UN Economic Commission for Europe, which currently has 61 contracting parties.² A single E-mark approval from any contracting party opens every other participating market.

What ECE R10 Covers

The regulation reaches a wider range of vehicles than many manufacturers expect. It applies to categories L (motorcycles, mopeds, and other two- or three-wheeled vehicles), M (passenger cars and buses), N (goods-carrying trucks), O (trailers and semi-trailers), T (agricultural tractors), R (agricultural trailers), and S (towed agricultural machinery).³ Trailers and agricultural equipment fall under the regulation only when they contain electronic systems that could affect the towing vehicle or other road users.

Beyond complete vehicles, ECE R10 covers Electronic Sub-Assemblies (ESAs), meaning separate technical units designed to be installed in a covered vehicle. That includes both original equipment and aftermarket parts. Components performing an “immunity-related function” receive the most scrutiny. The regulation defines these broadly to include anything related to direct vehicle control, driver and passenger protection, data bus communication, or statutory vehicle data.¹ Steering-assist modules, braking controllers, airbag triggers, and cruise-control units all qualify. An ESA that lacks any immunity-related function is treated as compliant without undergoing the full immunity test suite.

There’s one useful carve-out. If a vehicle or ESA doesn’t contain an electronic oscillator operating above 9 kHz, the more intensive radiated-emissions testing phases don’t apply. Simple relay-based components or basic resistive circuits often fall below that threshold.

Series 07 and What Changed in 2025

The version of ECE R10 that matters now is Series 07, which became applicable on June 12, 2025.⁴ The biggest technical change: immunity testing now extends up to 6 GHz, a substantial jump from the previous 2 GHz ceiling.⁵ That expansion reflects modern wireless reality. 5G networks, vehicle-to-everything (V2X) systems, and advanced driver-assistance sensors all operate well above 2 GHz, and vehicles need to prove they can tolerate those signals.

Series 07 also updated referenced test standards for transient immunity. Pulses 1 through 3 now follow ISO 7637-2:2011, while Pulse 4 still references the older ISO 7637-2:2004 edition. The electric vehicle charging-mode test references received extensive revisions as well.⁵

Existing Series 06 approvals don’t expire overnight. Contracting parties may refuse new Series 06 approvals starting September 1, 2029, but approvals granted before that date remain valid. For vehicles and components unaffected by the Series 07 changes, Series 06 approvals will continue to be accepted indefinitely.⁴ Any manufacturer designing a new product now should target Series 07 from the start.

What the Testing Involves

ECE R10 testing splits into two families. Emissions testing measures the electromagnetic energy escaping from a vehicle or component. Immunity testing measures whether the vehicle keeps working correctly when exposed to outside electromagnetic energy.

Emissions

The regulation distinguishes between broadband emissions, which spread energy across a wide swath of the spectrum (electric motors, switching supplies), and narrowband emissions, which concentrate energy at discrete frequencies (microprocessor clocks, oscillators). Each has its own limit curves. Broadband emissions are measured starting in the 30–75 MHz range; narrowband emissions are assessed from 30–230 MHz at a standard 10-meter measurement distance. All testing takes place inside shielded anechoic chambers so outside signals don’t contaminate the results.

Conducted emissions focus on electrical noise traveling through the vehicle’s wiring harness or, for EVs, through the charging cable to the grid. A component pumping noise back into shared power lines can degrade other modules on the same bus.

Radiated Immunity

The vehicle is exposed to a high-intensity electromagnetic field simulating real-world sources like cellular base stations, broadcast transmitters, and high-voltage power lines. Under Series 05 and 06, the test applies a field strength of 30 V/m across at least 90% of the 20–2000 MHz band, with a floor of 25 V/m throughout the entire range. Series 07 extends the upper end to 6 GHz. During exposure, engineers monitor whether any safety-related system changes state unexpectedly. A vehicle that accelerates, brakes, unlocks its doors, or throws a false airbag warning has failed.

Transient Pulse Immunity

The vehicle’s electrical system is a hostile environment. Every time a relay clicks, a motor starts, or a lamp filament burns out, the supply lines see sharp voltage spikes. ECE R10 references ISO 7637-2, which defines standardized transient waveforms covering inductive-load disconnection (Pulse 1), sudden supply interruption in 12V and 24V systems (Pulses 2a/2b), switching transients as fast bursts (Pulses 3a/3b), and load dump, where the battery disconnects while the alternator charges at full output (Pulse 5). The device under test must either keep operating normally through these disturbances or return to normal operation automatically once the disturbance ends. If a technician has to reset or power-cycle the device, it fails.¹

EV Charging-Mode Requirements

Revision 6 added a layer of testing that earlier versions never addressed: what happens electromagnetically when an electric vehicle plugs into the power grid. A car pulling kilowatts through its on-board charger is both a potential source of interference on the AC mains and a target for conducted disturbances traveling back through the cable. ECE R10 requires that vehicles and ESAs undergo conducted emission and immunity testing while in “REESS charging mode coupled to the power grid.”⁶

During these tests, the vehicle’s battery must be maintained between 20% and 80% state of charge, using an Electric Vehicle Supply Equipment (EVSE) simulator to communicate with the vehicle and hold it in active charging. The requirement covers all standard charging modes (Modes 1 through 4). Rather than inventing new procedures, the regulation references existing industrial standards:

Harmonic current emissions follow IEC 61000-3-2 or IEC 61000-3-12, depending on current rating.
Voltage fluctuations and flicker follow IEC 61000-3-3 or IEC 61000-3-11.
RF conducted emissions on power lines follow CISPR 16-2-1 and IEC 61000-6-3.
Fast transient burst immunity follows IEC 61000-4-4.
Surge immunity on power lines follows IEC 61000-4-5.

These charging-mode tests are one of the areas where Series 07 made further refinements, so manufacturers of on-board chargers and charging infrastructure should review the updated text carefully.⁶

Reading the E-Mark

Once a vehicle or ESA passes every applicable test, it receives the E-mark. The mark must be permanently affixed and clearly legible. On vehicles, it appears on the manufacturer’s data plate. On ESAs, it goes on the component housing or label.

The format is a circle containing the letter “E” followed by the country code of the approving nation, then “10R” (indicating Regulation 10), the revision number, and the type approval number. So “E1 10R-06 12345” means the approval was granted by Germany under Revision 6, with approval number 12345. Common country codes include E1 for Germany, E2 for France, E3 for Italy, E11 for the United Kingdom, E43 for Japan, E45 for Australia, and E51 for South Korea.

Getting Type Approval

The approval process starts well before any testing. Manufacturers assemble a technical folder that gives the Type Approval Authority a complete picture of the electronic design. The core of the folder is a set of circuit diagrams showing electricity flow, filtering, and shielding. A component list identifies every piece of hardware that could influence electromagnetic behavior: microprocessors, power supplies, voltage regulators, and similar parts.

The application also requires the manufacturer’s commercial name, the trade name of the component, and precise descriptions of the installation environment. Cable lengths, antenna orientations, connector types, and grounding points all matter because even small changes to wiring layout can shift emission patterns. Photographs or three-dimensional models help clarify the physical architecture when drawings aren’t enough.

A representative sample of the vehicle or ESA is sent to the testing laboratory. If the production version will differ from the submitted sample in any electromagnetically relevant way, those differences need to be disclosed upfront. Testing a prototype and then shipping a different board layout is one of the fastest ways to lose an approval.

With the folder complete, the manufacturer submits the package to a Type Approval Authority in any contracting party. The authority designates an accredited technical service to perform the evaluations, and that lab generates a formal test report. If testing succeeds, the authority issues a communication form granting the E-mark certification with the unique country code identifying the issuing nation. Plan for the laboratory phase itself to take several weeks, plus administrative processing.

One approval is all you need. Under the mutual recognition principle of the 1958 Agreement, an E-mark granted by any contracting party must be accepted by every other contracting party applying the same regulation. A component approved in the Netherlands can be legally sold in Japan, Australia, South Korea, and across the EU without repeating a single test.

Staying Compliant After Approval

Getting the E-mark isn’t the finish line. The regulation requires manufacturers to prove that every unit rolling off the production line matches the approved type, enforced through Conformity of Production (CoP) requirements that apply to the manufacturer and every assembly plant listed on the certificate.

Manufacturers must either hold a recognized quality management certification (such as ISO 9001) or submit to direct audits by the Approval Authority. Beyond the quality system, manufacturers must maintain documented control plans for each approval, including agreements to perform periodic tests or checks that verify continued conformity. The 1958 Agreement sets a minimum audit frequency of once every three years, but authorities can require annual full re-tests if they lack confidence in the manufacturer’s quality controls. In practice, many authorities waive periodic re-testing when the manufacturer’s quality system is robust and well-documented.

Failing a CoP audit can lead to suspension or withdrawal of the E-mark, which immediately blocks the product from every market that accepted the original approval.

What Happens Without a Valid E-Mark

Selling a vehicle or component without a valid E-mark in a market that requires one triggers enforcement by national market surveillance authorities. Under EU Regulation 2019/1020, these authorities can order product withdrawals, recalls, and financial sanctions to stop non-compliant products from circulating.⁷ Specific penalties vary by country because each EU member state sets its own fines and enforcement procedures. Outside the EU, contracting parties enforce compliance through their own national frameworks, but the practical effect is the same: no valid E-mark means no legal access to the market.

Economic operators are also required to cooperate with market surveillance authorities during investigations. For products sold into the EU, an economic operator established within the EU must be designated as responsible for compliance tasks. Ignoring an inquiry or obstructing an investigation typically escalates the penalties beyond what the original non-compliance would have triggered on its own.⁷

1
EUR-Lex. Regulation No 10 of the Economic Commission for Europe of the United Nations
2
United Nations Treaty Collection. Agreement Concerning the Adoption of Harmonized Technical United Nations Regulations for Wheeled Vehicles
3
TÜV SÜD. ECE Regulation R10 – Automotive EMC Testing
4
Applus+ IDIADA. New Series 07 of Amendments to UN R10 Regulation on Electromagnetic Compatibility Enters into Force
5
SGS Finland. Update to UN ECE Regulation R 10.07
6
AMETEK CTS. Electric Vehicle Conducted Emission and Immunity Testing in Configuration REESS as per UNECE Regulation 10
7
European Commission. Market Surveillance for Products