B0100 on Hyundai
Electronic Frontal Sensor 1 Malfunction
B0100 on Hyundai vehicles indicates electronic frontal sensor 1 malfunction. Au7o has documented this code across 1 Hyundai model — most commonly on Elantra. This is a body code in the airbag (SRS) system indicating a malfunction with electronic frontal impact sensor 1, one of the crash sensors that detects a frontal collision and tells the airbag controller when to deploy. The system runs a self-check on these sensors and their wiring, and when sensor 1 fails to communicate properly, reads out of range, or shows a circuit fault, this code sets and usually lights the airbag warning lamp. Because it affects crash protection, the airbags or seatbelt pretensioners may not deploy as designed until it's fixed. It generally points to a faulty sensor, its wiring/connector, or the airbag control module.
Common Causes of B0100
- •Faulty frontal impact (crash) sensor
- •Damaged, open, or shorted sensor wiring
- •Corroded or unseated sensor connector
- •Connector damage from a prior collision or repair
- •Poor ground or power supply to the sensor
- •Faulty airbag (SRS) control module
B0100 on Hyundai by Model
Hyundai Elantra(1 issue)
- Airbag Sensor and Control Module Malfunction2007-2013
Multiple airbag-related recalls affect Elantras due to driver seat track position sensor issues and passenger weight sensor contamination. The driver's airbag may deploy at incorrect pressure, and the passenger airbag may deploy regardless of occupant weight. Nearly 285,000 vehicles were recalled.
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View B0100 across all makes →Frequently Asked Questions
What does B0100 mean on Hyundai?▼
B0100 stands for "Electronic Frontal Sensor 1 Malfunction." This is a body code in the airbag (SRS) system indicating a malfunction with electronic frontal impact sensor 1, one of the crash sensors that detects a frontal collision and tells the airbag controller when to deploy. The system runs a self-check on these sensors and their wiring, and when sensor 1 fails to communicate properly, reads out of range, or shows a circuit fault, this code sets and usually lights the airbag warning lamp. Because it affects crash protection, the airbags or seatbelt pretensioners may not deploy as designed until it's fixed. It generally points to a faulty sensor, its wiring/connector, or the airbag control module. On Hyundai specifically, this code is documented across 1 model.
What causes B0100 on Hyundai vehicles?▼
Common causes on Hyundai: Faulty frontal impact (crash) sensor, Damaged, open, or shorted sensor wiring, Corroded or unseated sensor connector, Connector damage from a prior collision or repair, Poor ground or power supply to the sensor. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix B0100 on a Hyundai?▼
Repair costs vary widely depending on the root cause and specific Hyundai model.
Which Hyundai models have B0100 documented?▼
Au7o has documented B0100 on 1 Hyundai model: Elantra.