Sort the levels first. (EU) 2015/758 is the parent law — it mandates that eCall must be fitted. (EU) 2017/79 is the delegated implementing act that writes the technical requirements and test procedures in detail, including the positioning-accuracy judgement method.
The third layer is the amendment. The 2024 delegated regulation amends 2015/758; the parent-law status is unchanged. Another document in October 2025 upgraded the prior technical-spec version to a formal European standard and added an enhanced cyclic requirement for backup power.
Confusing these three layers is the root of many companies preparing materials in the wrong direction — answering a parent-law clause with an implementing-act requirement, or vice versa, and the review never lines up.
One more point to clarify: the EU framework is implemented on the basis of the relevant UN regulation; the two are not separate systems. Component makers can take the independent component-certificate path; whole-vehicle makers follow the whole-vehicle flow — do not read it as "exporting to the EU" and "component certification" being two unrelated things.
The minimum set of data (MSD), specified under EN 17184, is the base. It specifies the data block sent on a crash — 140 bytes — and the next-generation approach extends it on this base rather than starting fresh.
The two end-to-end standards are the core of the new generation: one governs the overall emergency-communications requirements, the other the packet-switched end-to-end flow. Both were upgraded from the prior technical-spec version, so note the transition version in your materials — do not write just a year number.
The circuit-switched standard applies only to 2G and 3G. Using it for a new-generation solution gets no recognition from the body — a common cause of rework. A hybrid solution touches both, so do not rule it out with a blanket "never touch it."
From 1 January 2026, new applications follow the new European standard; the old technical spec is no longer accepted. This gates new applications — the installation obligation under the parent law (2015/758 and its 2024 amendment) is unchanged; what changed is the referenced technical-standard version, upgraded from CEN/TS to formal EN.
From 1 January 2027, the rule says whole-vehicle type-approval certificates for vehicles approved under the old standard but not meeting the new technical spec are no longer accepted for new-vehicle registration. This is a registration-effect issue, not a certificate cancellation; already-registered stock vehicles are unaffected.
Do not conflate the two; match your vehicle model's node when planning production.
① Positioning accuracy. The open-environment baseline is 95% circular error probable (CEP) within 50 m; urban occlusion uses a different algorithm. The 15 m figure circulating online is an indicator of another domestic system — do not apply it to the EU side.
② Backup power. The test is not "complete one call and done"; it is maintaining the specified standby duration after simulating main-power cut, then completing a full call flow. From 2027, new certifications also run the enhanced cycle, split into three segments, with specific timing per the (EU) 2025/1871 appendix.
③ Audio path. The in-car occupant-to-rescue call link after a crash must be verified separately; any change to microphone or speaker layout re-tests this segment.
④ Antenna. The antenna's actual performance once installed differs from testing the component alone; whole-vehicle integration must re-verify.
⑤ A component certificate does not substitute for the whole vehicle. An independent certificate only waives repeat testing of the component itself; not one of the integration items after installation can be skipped.
⑥ Trigger logic must be verified at the whole-vehicle level. Which control unit the crash signal comes from, and how it decides whether to initiate a call, is not covered by component-alone testing — re-run it after installation.
BlueAsia reminds project owners that this regulation mandates only M1 and N1 category vehicles. Buses, heavy trucks and two-wheelers are outside the mandatory scope, but components can still pursue voluntary certification — do not read this as "completely off-limits."
Contact: King Email: king.guo@cblueasia.comAddress: Building C, Hongjingda Industrial Park, No. 107 Beihuan Road, Shiyan Street, Bao'an District, Shenzhen, China BlueAsia delivers more than service!
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