Damaged, trapped or unplugged connector under the third row seat or trim, often from folding or removing the seat; Corroded, loose or damaged wiring or connectors in the circuit to the third row restraint, including a connector left unplugged after earlier work; Wiring chafed or broken where it passes through seat hinges, pillars or floor sections; Faulty restraint or inflator (squib) at the third row right position; Fault in the clockspring or intermediate harness, on models where the circuit routes through them; Faulty restraint control module or an internal driver fault.

B0049

Third Row Right Frontal Stage 1 Deployment Control.

Generic
Body
Generic code
High severity

How this code is built

B: SystemBody
0: Defined bySAE, the same on every car
0: AreaBody area 0
49: FaultThe specific fault in that area

What it means

B0049 is a generic SRS (airbag) code for the third row right frontal stage 1 deployment control circuit. The restraint control module found a fault in this circuit, such as abnormal resistance, an open circuit or a short, when it ran its self-test. While the fault is present the module may not be able to fire that restraint correctly in a crash. Which restraint sits at this position, and how it is wired, depends on the vehicle, so check the model-specific wiring information.

Symptoms

Airbag or SRS warning light on the dashboard
Light stays on permanently, or comes on after a seat or trim has been moved
Third row seating position flagged as faulty by the SRS module
Intermittent warning light after the third row seat is folded, removed or refitted
Car fails an inspection or diagnostic check because of the SRS fault

Possible causes

Damaged, trapped or unplugged connector under the third row seat or trim, often from folding or removing the seatlikely
Corroded, loose or damaged wiring or connectors in the circuit to the third row restraint, including a connector left unplugged after earlier worklikely
Wiring chafed or broken where it passes through seat hinges, pillars or floor sectionspossible
Faulty restraint or inflator (squib) at the third row right positionpossible
Fault in the clockspring or intermediate harness, on models where the circuit routes through themrare
Faulty restraint control module or an internal driver faultrare

How to diagnose

Read all SRS codes and any freeze frame or status data. Note whether the fault is current or stored, and whether other restraint codes are present.
Ask about recent work, seat removal, trim repairs, water ingress or accident damage in the third row area.
Visually inspect the third row right seat, trim, harness routing and connectors for damage, pinching, corrosion or poor seating. Do not disturb the airbag components more than necessary.
Check that the SRS connectors, which are often yellow, are fully seated and that any shorting clips or locks are correctly fitted.
Following the manufacturer procedure, isolate the battery and wait the specified time before unplugging any SRS connector. Never probe or test an airbag circuit with a standard meter or test lamp.
Using only the manufacturer's approved method and values, check circuit resistance and insulation for opens, shorts to ground and shorts to supply.
Compare against the model wiring diagram to confirm which restraint is on this circuit, as this varies with the vehicle.
After repair, clear the code, run the SRS self-test and confirm the warning light stays off and the fault does not return.

How to fix

Reseat, clean or replace damaged connectors and terminals in the circuit.
Repair or replace damaged wiring in the third row right circuit, following the manufacturer's repair guidance.
Replace the faulty restraint or inflator if testing under the manufacturer procedure shows it is defective.
Replace the clockspring or intermediate harness if it is confirmed as the cause on that model.
Replace or repair the restraint control module only after wiring and components are proven good, and carry out any required coding or setup.

Can I keep driving?

High severity

The car may still drive normally, but the third row right restraint may not deploy correctly in a crash. Limit use, avoid carrying passengers in that seat, and have it inspected by a qualified technician as soon as possible.

Guide written by AI from the code's definition. Confirm with a diagnosis before replacing parts.