Service campaign 26-01-065H DCS

Manufacturer communication, from NHTSA Manufacturer Communications

Published by NHTSA: Sep 2, 2026
Manufacturer: HYUNDAI
NHTSA ID: 11036686
NHTSA category: Service Campaign
Applies to, as stated by NHTSA: HYUNDAI IONIQ ELECTRIC 2020-2021; HYUNDAI KONA ELECTRIC 2019-2023
Component, as stated by NHTSA: ELECTRICAL SYSTEM; FUEL/PROPULSION SYSTEM

Text of the manufacturer communication

Certain Kona Electric (OS EV) and Ioniq Electric (AE EV) vehicles are eligible for a Battery Management System (BMS) software update. This update to the BMS software improves the system's diagnostic capability. Follow Technical Service Bulletin (TSB) 26-01-065H to complete the BMS software update.

Manufacturer document number: 26-01-065H DCS
Date of the communication: 2026-08-17
Manufacturer campaign or software version: 9C5

View original source on NHTSA.gov

NHTSA reuses some ID numbers across record types. If its page lists more than one record, this one is the manufacturer communication dated Sep 2, 2026.

For the 2023 Hyundai Ioniq 5

SEL AWD Long Range

Ignored

Relevance of 7% is under one half, so the notice is ignored whatever the other figures say.

Vehicle relevance: 7%
Attention: 17%
Interrupt probability: 12%

Importance to this owner: 0.2 of 4, none
Vehicle area the notice is about: None

This manufacturer communication does not appear to warrant attention for this vehicle.

Decided by jev-1.13.0 in 125 ms from 1,648 input tokens. Jev returns these figures and nothing else. It gives no reasons, and none are written for it here. The figures describe how relevant the notice is, not the condition of any vehicle.

Checked by code against NHTSA's fields

A plain comparison with the structured fields NHTSA filled in. Separate from Jev's decision.

YesNHTSA names this make
NoNHTSA names this model
n/aNHTSA lists model year 2023 for this model

The same notice, every vehicle

Relevance	Attention	Interrupt	State
7%	17%	12%	Ignored
2%	6%	6%	Ignored
2%	6%	6%	Ignored
2%	7%	6%	Ignored
2%	6%	5%	Ignored
2%	6%	6%	Ignored
1%	5%	5%	Ignored
1%	4%	5%	Ignored
1%	3%	4%	Ignored
1%	4%	5%	Ignored
1%	3%	4%	Ignored
1%	4%	5%	Ignored
1%	4%	5%	Ignored
1%	4%	4%	Ignored
1%	3%	4%	Ignored
1%	4%	4%	Ignored

Select a vehicle to see its attention and interrupt figures above.