B1049 on Nissan
Manufacturer-Specific Body Code (GM: Audio Output #3 Left-Rear Circuit Open)
B1049 on Nissan vehicles indicates manufacturer-specific body code (gm: audio output #3 left-rear circuit open). Au7o has documented this code across 4 Nissan models — most commonly on Maxima, Rogue, Sentra. B1049 is a manufacturer-specific body code whose meaning depends on the vehicle maker. On GM/Chevrolet vehicles it generally refers to the audio amplifier output #3 (left-rear speaker) circuit being open, meaning the module detected a break in the wiring to that speaker. On some other makes a B1049 may map to a different body/comfort circuit, so the definition should be confirmed for the specific vehicle. It is typically a comfort/convenience fault rather than a safety issue. Typical repair costs on Nissan range from $150 to $1,400, depending on the specific model and root cause.
Common Causes of B1049
- •Open or broken wiring to the left-rear speaker
- •Faulty or blown speaker
- •Corroded or loose speaker connector
- •Damaged radio/amplifier output stage
- •Chafed or pinched harness behind trim or in door
- •Poor ground at the audio module
B1049 on Nissan by Model
Nissan Maxima(1 issue)
- Occupant Classification System Sensor Mat Failure (Passenger Airbag Disabled)2007-2018
The passenger seat cushion contains an Occupant Classification System pressure sensor mat and control unit that decide whether the front passenger airbag is armed. The mat's bladder or its pressure sensor drifts out of calibration as the seat foam wears, and the connectors under the seat corrode or fret loose from seat travel. The result is the PASSENGER AIRBAG OFF lamp staying lit with an adult in the seat - the airbag is genuinely disabled - usually with an air bag warning light and a stored B1018-family OCS code. Nissan issued OCS-related recalls covering several Maxima model years, so a VIN check should always come before paying for parts.
Nissan Rogue(1 issue)
- Clock Spring / Spiral Cable Failure Causing Airbag Light and Loss of Steering Wheel Controls2008-2013
A known failure point on many Nissan models of this era is the steering wheel spiral cable (clock spring), which can break internally from repeated wheel rotation. On Rogue, owners report the airbag warning light illuminating along with loss of horn, cruise control, or audio controls on the steering wheel. Because it affects the driver airbag circuit, the issue has clear safety implications even if the vehicle remains drivable.
Nissan Sentra(1 issue)
- Steering Wheel Clock Spring Failure Causing Airbag Warning and Inoperative Steering Controls2023-2025
Some owners report airbag warning lights, loss of steering-wheel audio/cruise buttons, and intermittent horn operation traced to the spiral cable/clock spring assembly. When the clock spring develops an internal open circuit, it can interrupt communication and power to steering-wheel-mounted systems and potentially affect the driver's airbag circuit. While not every case results in an airbag fault, the safety implications make it significant.
Nissan Versa(1 issue)
- Passenger Occupant Classification Sensor (OCS) Mat Failure — Passenger Airbag Stays Disabled2007-2022
The Versa's NISSAN Advanced Air Bag System weighs the front passenger via an occupant classification sensor mat and bladder built into the passenger seat cushion, plus a seat-belt tension sensor. The pressure mat's printed circuit traces crack from repeated seat loading, and the harness that runs under the seat frame chafes or corrodes at the connector. When the OCS control unit sees an implausible or open-circuit reading it fails safe and leaves the 'PASSENGER AIR BAG OFF' telltale illuminated with a normal-sized adult seated — meaning the passenger front airbag will not deploy in a crash. Owners report the light behaving erratically first (going out only when the passenger shifts position) before staying on permanently. Nissan's service remedy is often a re-zero/reflash of the OCS control unit rather than parts, so a good number of cars are fixed without a seat teardown, but a genuinely failed mat requires the seat cushion assembly.
Looking for B1049 on a different make?
View B1049 across all makes →Frequently Asked Questions
What does B1049 mean on Nissan?▼
B1049 stands for "Manufacturer-Specific Body Code (GM: Audio Output #3 Left-Rear Circuit Open)." B1049 is a manufacturer-specific body code whose meaning depends on the vehicle maker. On GM/Chevrolet vehicles it generally refers to the audio amplifier output #3 (left-rear speaker) circuit being open, meaning the module detected a break in the wiring to that speaker. On some other makes a B1049 may map to a different body/comfort circuit, so the definition should be confirmed for the specific vehicle. It is typically a comfort/convenience fault rather than a safety issue. On Nissan specifically, this code is documented across 4 models.
What causes B1049 on Nissan vehicles?▼
Common causes on Nissan: Open or broken wiring to the left-rear speaker, Faulty or blown speaker, Corroded or loose speaker connector, Damaged radio/amplifier output stage, Chafed or pinched harness behind trim or in door. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix B1049 on a Nissan?▼
Repair costs on Nissan range from $150 to $1,400, depending on the specific model and root cause.
Which Nissan models have B1049 documented?▼
Au7o has documented B1049 on 4 Nissan models: Maxima, Rogue, Sentra, Versa.