Hyundai Elantra 2021 — technical service bulletin
Bulletin 21-GI-005H · NHTSA communication 10196583 · issued May 26, 2021
Technical service bulletin
communication type
Electrical System
component
2021
model years
1
vehicle entries
Official summary
This bulletin provides information regarding the use of window mounted lockboxes without RFID shielding, which may cause battery drain on dealer stock vehicles. The lockbox is still within the range of the receiver when it is mounted to the rear window. This will cause the key fob to continuously transmit a RF (radio frequency) to the receiver. It is recommended to use a lockbox with RFID shielding to block the RF signal and prevent battery drain.
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.