B0102 on Toyota
Electronic Side Sensor Malfunction
B0102 on Toyota vehicles indicates electronic side sensor malfunction. Au7o has documented this code across 2 Toyota models — most commonly on 4Runner, RAV4. This body/safety code indicates a malfunction with an electronic crash sensor used by the airbag (SRS) system, typically a frontal or side impact sensor on one side of the vehicle. The airbag control module continuously checks these sensors so it can deploy airbags and tensioners correctly in a crash, and it sets this code when a sensor reports an incorrect identity, fails, or its circuit is faulty. The airbag warning light will usually be on. Because it can compromise crash protection, it should be diagnosed promptly.
Common Causes of B0102
- •Faulty electronic side/frontal impact sensor
- •Open, shorted, or damaged sensor wiring harness
- •Corroded or loose sensor connector
- •Wrong or incompatible replacement sensor installed
- •Damage from a prior collision or water intrusion
- •Poor ground or connection in the SRS circuit
- •Faulty airbag control module (less common)
B0102 on Toyota by Model
Toyota 4Runner(1 issue)
- Takata Airbag Recall2010-2016
Takata airbag inflators can explode during deployment, sending metal shrapnel at occupants. This is a critical safety recall affecting millions of vehicles. The driver and/or passenger airbag inflators need replacement. Multiple deaths and injuries have been linked to this defect.
Toyota RAV4(1 issue)
- Occupant Classification Sensor Short Circuit / Airbag Non-Deployment2020-2022
The Occupant Classification System (OCS) sensor in the front passenger seat may have been improperly manufactured, causing a short circuit. This can prevent the front passenger airbag from deploying in a crash when it should. Part of a 1.12 million vehicle recall.
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View B0102 across all makes →Frequently Asked Questions
What does B0102 mean on Toyota?▼
B0102 stands for "Electronic Side Sensor Malfunction." This body/safety code indicates a malfunction with an electronic crash sensor used by the airbag (SRS) system, typically a frontal or side impact sensor on one side of the vehicle. The airbag control module continuously checks these sensors so it can deploy airbags and tensioners correctly in a crash, and it sets this code when a sensor reports an incorrect identity, fails, or its circuit is faulty. The airbag warning light will usually be on. Because it can compromise crash protection, it should be diagnosed promptly. On Toyota specifically, this code is documented across 2 models.
What causes B0102 on Toyota vehicles?▼
Common causes on Toyota: Faulty electronic side/frontal impact sensor, Open, shorted, or damaged sensor wiring harness, Corroded or loose sensor connector, Wrong or incompatible replacement sensor installed, Damage from a prior collision or water intrusion. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix B0102 on a Toyota?▼
Repair costs vary widely depending on the root cause and specific Toyota model.
Which Toyota models have B0102 documented?▼
Au7o has documented B0102 on 2 Toyota models: 4Runner, RAV4.