B1650 on Hyundai
Occupant Classification System / Paint Code Configuration (manufacturer-specific)
B1650 on Hyundai vehicles indicates occupant classification system / paint code configuration (manufacturer-specific). Au7o has documented this code across 1 Hyundai model — most commonly on Accent. B1650 is a manufacturer-specific body code whose exact meaning depends on the vehicle maker. On several vehicles it is reported as an Occupant Classification System (OCS) malfunction, the system that senses the front passenger's weight/presence to decide whether and how forcefully to deploy that airbag; on some Ford-family vehicles a B1650-range code instead refers to a paint/option configuration value. Because the definition differs by brand, confirm against the specific make. If it is OCS-related, treat it as airbag-related and have it diagnosed promptly. Typical repair costs on Hyundai range from $250 to $2,400, depending on the specific model and root cause.
Common Causes of B1650
- •Faulty occupant classification (passenger seat weight) sensor or mat
- •Damaged wiring or connector to the seat occupant sensor
- •OCS module needs recalibration after a seat or sensor change
- •Faulty occupant classification control module
- •Incorrect option/paint configuration data in the module (on makes using that definition)
- •Faulty body control or restraints control module
B1650 on Hyundai by Model
Hyundai Accent(1 issue)
- Passenger Occupant Classification Seat Sensor Mat Failure (Airbag / PASSENGER AIRBAG OFF Light)2006-2017
The occupant classification sensor mat built into the front passenger seat cushion fails internally - the printed pressure-sensing traces crack with repeated loading. The car then either lights the SRS/airbag warning lamp with an OCS fault stored, or leaves the PASSENGER AIRBAG OFF indicator lit with an adult sitting in the seat, meaning the passenger airbag will not deploy in a crash. It affects MC (2006-2011) Accents heavily and continues on later cars, and it is well documented across Hyundai/Kia models generally. The financial sting is that Hyundai does not sell the mat separately - the fix is the entire lower seat cushion assembly, and forum owners have posted dealer quotes in the $1,200-$2,400 range for what is a failed sensor pad.
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View B1650 across all makes →Frequently Asked Questions
What does B1650 mean on Hyundai?▼
B1650 stands for "Occupant Classification System / Paint Code Configuration (manufacturer-specific)." B1650 is a manufacturer-specific body code whose exact meaning depends on the vehicle maker. On several vehicles it is reported as an Occupant Classification System (OCS) malfunction, the system that senses the front passenger's weight/presence to decide whether and how forcefully to deploy that airbag; on some Ford-family vehicles a B1650-range code instead refers to a paint/option configuration value. Because the definition differs by brand, confirm against the specific make. If it is OCS-related, treat it as airbag-related and have it diagnosed promptly. On Hyundai specifically, this code is documented across 1 model.
What causes B1650 on Hyundai vehicles?▼
Common causes on Hyundai: Faulty occupant classification (passenger seat weight) sensor or mat, Damaged wiring or connector to the seat occupant sensor, OCS module needs recalibration after a seat or sensor change, Faulty occupant classification control module, Incorrect option/paint configuration data in the module (on makes using that definition). Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix B1650 on a Hyundai?▼
Repair costs on Hyundai range from $250 to $2,400, depending on the specific model and root cause.
Which Hyundai models have B1650 documented?▼
Au7o has documented B1650 on 1 Hyundai model: Accent.