B1018 on NISSAN ALTIMA
Passenger occupant classification / air bag sensor fault
Methodology: We combine code standards with complaint and reliability patterns, then review for clear, vehicle-first diagnosis steps.
Sources: SAE/OBD-II definitions, manufacturer service information, and public reliability reports (including NHTSA where applicable).
Limits: Guidance is informational and may not match every model-year or revision. Confirm with the official manual and diagnostics before replacing parts. For safety-critical or electrical work, use a qualified technician.
What B1018 Means on Your NISSAN ALTIMA
B1018 on Nissan Altima points to passenger occupant classification / air bag sensor fault. FixIt matched 5 NHTSA owner reports for this exact code/vehicle pair, so use this page to prioritize the most likely symptoms, components, and next checks before replacing parts.
Real NISSAN ALTIMA Owner Reports
Source: NHTSA Complaints Database
"THE "PASSENGER AIRBAG NOT ON" LIGHT HAS BEEN INTERMITTENTLY FLASHING. IT NOW REMAINS LIT (PASSENGER AIRBAG OFF) WHEN THE SEAT IS UNOCCUPIED AND WHEN A FULL GROWN ADULT SITS IN THE PASSENGER SEAT. IN NOVEMBER OF 2012, THE AIRBAG LIGHT BEGAN TO FLASH ON THE DASHBOARD PANEL. I TOOK MY CAR INTO A NISSAN DEALERSHIP FOR REPA"
"I FIRST STARTED NOTICING THE PASSENGER AIRBAG LIGHT FLASHING OFF AND ON WHEN I WOULD PLACE A HEAVY ITEM IN THE SEAT. I WAS IN MY DRIVEWAY WITH THE CAR RUNNING. THEN THE SAME THING HAPPENED WITH A PASSENGER IN THE SEAT. THEN IT EVENTUALLY WAS SAYING THAT THE PASSENGER AIRBAG WAS TURNED OFF WITHER THERE WAS A PASSENGER O"
"I NOTICED MY PASSENGER AIRBAG "OFF" INDICATOR WAS ILLUMINATED AND MY DASHBOARD WARNING LIGHT WAS BLINKING. NO ONE WAS IN THE PASSENGER SEAT AT THE TIME. I TOOK MY CAR IN FOR SERVICE AT THE DEALERSHIP AND THEY FOUND AN ERROR CODE B1018 OCS. THIS PROBLEM DID NOT HAVE AN ACTIVE RECALL. THE DEALERSHIP REPLACED THE PASSENGE"
"The passenger seat airbag light is blinking on the dashboard as well as the passenger airbag on/off light is on meaning that the passenger airbag if off. Dealership found code B1018 for the occupant sensor. They told me the passenger seat cushion needs to be replaced. This is a huge safety concern as the airbag will no"
"Passenger airbag warning light is blinking Took to repair shop and tech said OCS is bad and needs replacing Code B1018 comes up I do not understand why there is not a recall because this is a safety Issue"
All reports filed by vehicle owners directly with the U.S. Department of Transportation.
📊 Complaint Trend by Model Year
Common Causes on NISSAN ALTIMA
Based on NHTSA complaint component analysis for this vehicle.
What To Do Next
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1
Check for recalls on YOUR VIN
Go to nhtsa.gov/recalls and enter your VIN. If your vehicle is covered, repairs are free.
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2
Get a proper diagnosis
A code alone doesn't tell you the exact failed part. A diagnostic at a shop ($50–$150) pinpoints the root cause before you spend money on parts.
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3
Compare repair quotes
Get 2–3 quotes. Dealer vs. independent shop prices often differ 30–50% for the same repair.