OCS system is faulty causing the airbags for the passenger to disengage. I am out of warranty for mileage at the time of the problem by 6,000. The car was 3 years old and it is an on going problem again. OCS switch showing improper voltage and cannot be reset unless the factory mechanic does the reset which holds me, the owner, responsible for the diagnostic fee. Additionally, the faulty…
2018 Nissan Altima airbags problems
severe 30 complaints filed with NHTSA · avg repair $1,100 · see airbags across all vehicles →
Complaints
30
Recalls
0
Avg fix
$1,100
2crashes
What stands out
Owners have filed 30 airbags complaints with NHTSA against this vehicle, but no formal recall covers the issue — the federal record reflects what manufacturers have admitted, not everything owners are reporting.
No new NHTSA airbags complaint has been filed on this vehicle in over 4 years — the issue may be aging out of the active population.
The failure pattern owners describe
Buyer takeaway: A 2018 Nissan Altima with any airbag warning light is a serious red flag—multiple owners report persistent, recurring failures involving driver and passenger airbags, seat sensors, and wiring harnesses that dealers struggle to fix, with parts backordered by Nissan and costs exceeding $3,000. Skip this vehicle unless you can confirm no airbag issues and get a written Nissan service history documenting any past repairs.
The 2018 Nissan Altima shows a pattern of airbag system failures across multiple failure modes. Owners report persistent airbag warning lights that illuminate without accidents or triggers—sometimes going off with a restart or battery reset, then returning within days. Diagnostic scans point to driver and passenger seat airbag modules (code B0020-13), occupancy sensors showing improper voltage, and intermittent wiring harness issues under the seat.
Dealers consistently quote $2,500–$3,500+ to replace defective modules, full seat assemblies, or seatbacks. The critical issue: Nissan parts are backordered with no ETA. Multiple owners waited 2–3 months without resolution and were told by Nissan corporate they cannot supply parts or provide timelines. Some dealers attempted "goodwill" repairs that failed and recurred.
More concerning, one owner was rear-ended at 35+ mph and neither the airbags nor the driver seatbelt deployed—Nissan subsequently told the owner airbags are designed only for rollovers, not frontal or rear collisions, and refused to inspect the system. Another documented head-on collision resulted in airbag non-deployment and occupant injury. Owners report the issue begins as early as 13,000 miles or as late as 79,000 miles, with some vehicles exhibiting recurring light failures over years despite multiple dealer visits.
Same Nissan Altima airbags reports on nearby years: 2015 · 2016 · 2017
Failure modes owners describe
Driver-side seat airbag module defect
Driver seat airbag module fails to function properly, with airbag warning light illuminated. Owners report the module itself is defective and requires replacement.
When: Varies from early in ownership to higher mileage; one reported at 36,000 miles
Symptoms owners cite: Airbag warning light illuminated; Module confirmed defective by dealer inspection; Airbag may fail to deploy in collision
Codes mentioned: B0020-13
Repairs/costs cited: Driver seat airbag module replacement required; estimates quoted $3,247.44 to $3,500+. Dealers report parts not available from Nissan, 2+ month waits reported.
Recalls/TSBs owners mention: Nissan Consumer Affairs notified but no resolution provided; no ETA available for replacement parts; some owners report goodwill repairs that later fail again
Passenger-side airbag sensor/occupancy detection failure
Passenger seat occupancy sensor fails, causing airbag light to illuminate. Sensor detects incorrect weight presence or fails to detect occupant, disabling passenger airbag deployment.
When: Occurs at various mileages and ownership periods; one at 13,000 miles, another at 79,000 miles
Symptoms owners cite: Airbag warning light illuminated on dash; Passenger airbag disabled or may not deploy; Sensor showing improper voltage reading
Codes mentioned: OCS system fault codes (specific codes not detailed in narratives)
Repairs/costs cited: Sensor replacement or full panel replacement required; one owner quoted $2,500–$3,000; another told entire panel must be replaced. Goodwill repairs have failed and problem recurred.
Recalls/TSBs owners mention: Some recalls issued for 2016 and prior models; 2018 recall mentioned by one owner as pending. Manufacturers informed in some cases but no consistent resolution provided.
Intermittent airbag warning light (electrical harness/connector issue)
Airbag warning light illuminates intermittently or persistently, with root cause traced to wiring harness or connector failure. Light comes on without accident or trigger, sometimes goes off after restart or battery disconnect, then returns.
When: Reported across vehicle ages from 3 to 5+ years old; one at 37,955 miles
Symptoms owners cite: Airbag warning light comes on, may go off with restart or battery reset, then returns; Light remains on permanently in later occurrences; No accident or identifiable trigger; Problem persists despite fuse checks and sensor cleaning by owner
Codes mentioned: B0020-13, Unknown diagnostic code (narrative #26 mentions 'L4')
Repairs/costs cited: One owner reports wiring from connector under seat to side airbag is intermittently opening depending on seat position; seat replacement quoted $2,500–$3,000. Some dealers blamed objects under seat (coin wallet, debris) but problem recurred after removal. Independent mechanic cleared code with scan tool and computer reset, but failure recurred.
Recalls/TSBs owners mention: Some manufacturers notified; no recalls cited for this specific issue in 2018 model. One dealer blamed temperature; another blamed foreign objects. Multiple repair attempts by dealers have failed.
Seat belt pretensioner/seatbelt restraint system malfunction
Driver-side seatbelt fails to restrain occupant properly during collision or normal operation. Belt remains loose and does not grip as intended, or does not pre-tense on impact.
When: Reported after rear-end collision at 35+ mph; also reported on 4-year-old vehicle with no prior accident
Symptoms owners cite: Shoulder strap does not restrain driver during collision; Seatbelt freely moves when it should be locked or tensioned; Seatbelt does not grip on brake application
Repairs/costs cited: No repairs documented; collision shop indicated seatbelt should have restrained occupant and worked in conjunction with airbags. Nissan told owner seatbelts and airbags designed only for rollover protection.
Recalls/TSBs owners mention: Nissan stated airbags and seatbelts are designed only for rollover, not for front or rear collisions, and refused to inspect or confirm proper function. No warranty or recall action taken.
Airbag non-deployment during collision
Airbags fail to deploy during actual accidents, despite no prior warning lights or system faults. One documented rear-end collision at 35+ mph resulted in zero airbag deployment and seatbelt failure.
When: Occurred during rear-end collision; another report of head-on collision with non-deployment in 2022
Symptoms owners cite: No airbag deployment in multi-vehicle collision; Seatbelt also fails to restrain; No warning lights present before accident; Occupant thrown forward into steering wheel/dashboard
Repairs/costs cited: Collision center assessed damage at $10,000+ and noted both seatbelt and airbag should have deployed. No post-accident repair or investigation documented.
Recalls/TSBs owners mention: Nissan refused inspection after accident, claiming system works as designed for rollover only.
Seat frame/seatback structure airbag mounting failure
Driver or passenger seat frame or seatback structure containing airbag sensor/module becomes defective. Dealers identify need for entire seat assembly replacement rather than component-only repair.
When: Reported after airbag light appears; one early occurrence around 34,000–35,000 miles
Symptoms owners cite: Airbag warning light illuminated; Dealer determines seat frame or seatback containing airbag sensor must be replaced entirely; Issue recurs after previous repair attempts
Repairs/costs cited: Full driver or passenger seat assembly replacement required, not isolated sensor or module swap. Parts unavailable from Nissan; 2+ month waits reported. Estimated cost $3,500+ depending on labor and seat complexity.
Recalls/TSBs owners mention: Nissan informed; no ETA provided for replacement parts. One owner reports Nissan cannot supply part or provide timeline for availability.
Synthesized from 30 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 2 most recent
My car's airbag light came on and would not go off. I took it to the dealership and was told that the sensor in my passengar seat that detects the weight of some one in the seat is not working. Because of this sensor failing, my air bags will not deploy if the car is involved in an accident. It puts me at a safety risk because air bags will not provide protection to me or passengars riding in my…
Had airbags trouble with your 2018 Nissan Altima?
File a complaint with NHTSA → It's free, official, and how every report above got here — owner filings are the federal safety record this page is built on.
Common questions
How serious is the airbags problem on the 2018 Nissan Altima?
It's a meaningful issue. 30 complaints have been filed and the failure mode causes operational problems for owners. Repairs average $1,100.
At what mileage does the airbags typically fail?
Based on the 30 complaints filed, airbags issues most often appear around 47,768 miles. Some report problems earlier; some make it well past 150,000 with no symptoms. Maintenance habits matter — vehicles that received timely fluid services and were not regularly overworked tend to last longer.
What does it cost to fix?
Independent shops typically charge around $1,100 for airbags repairs on this vehicle. Dealer pricing tends to run 20-40% higher. The exact figure depends on the specific failure mode, parts availability, and your local labor rates. If you're outside factory warranty, an extended service contract often covers this category.
Are there any recalls related to airbags?
No active recalls currently cover airbags issues on this vehicle. The complaints filed represent owner-reported failures that haven't risen to the level of a manufacturer-issued recall — but they're still worth knowing about before you buy or budget for repairs.
Related
Complaint and recall data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database. Verify the raw federal record at
nhtsa.gov/vehicle/2018/Nissan/Altima.
Severity ratings are derived from reported crashes, fires, injuries, and fatalities. Repair cost estimates are
independent-shop national averages and may differ in your area. Some links on this page are affiliate links.