When certain Model 3 and Model Y vehicles receive a different Occupant Classification System (OCS) in their front passenger seats during vehicle servicing, they may require safety vent type front passenger airbags to maintain compatibility between the front passenger seat and the front passenger airbag.
full bulletin at NHTSA ↗2019 Tesla Model 3 airbags problems
severe 59 complaints filed with NHTSA · avg repair $1,100 · see airbags across all vehicles →
Complaints
59
Recalls
0
Avg fix
$1,100
8crashes
5injuries
What stands out
Owners have filed 59 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.
Among the 8 model years of Tesla Model 3 in our records for airbags problems, this one ranks #2 by owner-complaint volume.
Is there a fix? Manufacturer service bulletins
The manufacturer has issued service bulletins covering airbags on this vehicle — documented repair instructions, service campaigns, or warranty extensions sent to dealers. A TSB isn't a recall (it's not a free safety remedy), but it's the manufacturer acknowledging the issue and how to fix it.
On some Model 3 and Model Y vehicles, the Occupant Classification System (OCS) signal might be affected by electrical interference in the seat electrical harness, causing the airbag indicator to display on the touchscreen.
full bulletin at NHTSA ↗On some Model 3 and Model Y vehicles, the Occupant Classification System (OCS) signal might be affected by electrical interference in the seat electrical harness, causing the airbag indicator to display on the touchscreen.
full bulletin at NHTSA ↗When certain Model 3 and Model Y vehicles receive a different Occupant Classification System (OCS) in their front passenger seats during vehicle servicing, they may require safety vent type front passenger airbags to maintain compatibility between the front passenger seat and the front passenger airbag.
full bulletin at NHTSA ↗Certain Model 3 and Model Y vehicles may need a different Occupant Classification System (OCS) installed in the front passenger seat before servicing its subcomponents.
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
The failure pattern owners describe
The front passenger and driver-side restraint system faults dominate complaints about 2019 Model 3 airbags. Owners consistently report error code RCM_a056 (front passenger) or RCM_a021 (front left driver) warnings appearing intermittently or persistently, with Tesla service centers acknowledging these are "known issues." The root problems vary: occupant classification sensor failures in the passenger seat, wiring harness damage under the driver-side seat (sometimes related to the automatic Easy Entry function), and incompatibility between new sensors and existing airbag hardware. Tesla quotes range from $400 for sensor filtering to $2,500 for full seat and airbag replacement. Most owners report the fault appears after 35,000–50,000 miles, often just outside the 60,000-mile / 5-year warranty window. Tesla has not issued a recall; it references a service bulletin (SB-19-20-003) but forces owners to pay for repairs classified as manufacturing defects. A handful of crash complaints document airbag non-deployment during significant impacts and, conversely, spontaneous deployments without collision. One owner reported rodent damage to restraint system wires; Tesla denied coverage despite inadequate wire protection. Owners emphasize the critical safety nature of these systems and question why known defects are not recalled and covered by the manufacturer.
Same Tesla Model 3 airbags reports on nearby years: 2018 · 2020 · 2022
Failure modes owners describe
Front Passenger Occupant Classification System (OCS) Sensor Failure
Occupant weight or classification sensor in front passenger seat malfunction causing 'Front Passenger Safety Restraint System Fault' warnings (error code RCM_a056). Tesla has confirmed this is a known issue at some service centers. The sensor failure triggers warnings but vehicle continues to operate. Owners report the fault appears intermittently or persistently; some faults disappear temporarily when seat position is adjusted. Core issue is sensor incompatibility with existing airbag hardware, forcing full component replacement rather than sensor-only repair.
When: Reports span 35,000 to 50,100 miles; some at 5-6 years old; several within 60,000-mile warranty period but denied coverage; many post-warranty (60k miles / 5 years)
Symptoms owners cite: Intermittent or persistent 'Front Passenger Safety Restraint System Fault' warning on display; Error code RCM_a056 displayed; Warning disappears temporarily with seat adjustment then returns; Fault persists across multiple driving sessions; Loud warning beep every 5 minutes of driving (reported in some cases); Airbag indicator illuminated
Codes mentioned: RCM_a056
Repairs/costs cited: Owners cite Tesla quotes of $400–$600 for sensor alone, but replacement requires entire front passenger seat harness assembly, seat belt reminder sensor box, occupancy sensor, and passenger airbag ($1000–$2500 total). Some owners quote $500–$600 initially, later revised to $1,200+ due to sensor-airbag incompatibility. One owner reports Tesla service initially quoting $384 for harness repair but claiming rodent damage voids warranty, charging $180 instead. Another owner reports $1,800 quoted for OCS filter module replacement and seat retrofit. Repair costs commonly $1,000–$2,000+.
Recalls/TSBs owners mention: Tesla initially covered repairs under 60,000-mile Supplemental Restraint System warranty in some cases (at least one owner, complaint #2), but later denied coverage citing expiration of general warranty (5 years or 60k miles). Some service centers confirmed this is a 'known issue' but charge customer repair costs. Tesla references Service Bulletin SB-19-20-003 (RCM_a078 in complaint #16) as confirmation of known manufacturing defect. One owner reports Tesla stating the faulty airbag must be replaced due to incompatibility with new sensor (not a defect in airbag itself). Tesla has not issued a recall as of latest complaint dates.
Front Left Safety Restraint System Fault (Wiring Harness / Seat Belt Pretensioner)
Wiring harness damage under front driver-side seat affecting seatbelt pretensioner circuit (error code RCM_a021). Owners report pinched or damaged wires under the seat, sometimes related to the 'Easy Entry' automatic seat positioning function that lowers and moves the seat backward/forward. Wires may also be subject to rodent damage in some locations. Failure disables seatbelt pretensioner mechanism, which activates during collision.
When: Reported from January 2026 onward (complaint #26); one owner experienced fault for 4 months before service in April 2026. Error code RCM_a021 appears periodically or persistently.
Symptoms owners cite: Intermittent or persistent 'Front Left Safety Restraint System Fault' warning (RCM_a021); Airbag indicator illuminated; Warning appears each time automatic Easy Entry function activates (complaint #33); Fault occurs without collision or obvious damage
Codes mentioned: RCM_a021
Repairs/costs cited: Owners cite quotes of $360–$460 for harness repair/replacement. One owner (complaint #26) paid for wiring harness replacement at a service center; repair resolved the issue. Complaint #2 mentions rodent chewing wires covered only in cheap plastic tape; owner paid $180 out-of-pocket after Tesla denied warranty coverage.
Recalls/TSBs owners mention: No formal recall noted. One owner (complaint #26) had harness replaced, confirming it is a repairable failure but at owner expense post-warranty. Complaint #2 indicates Tesla blamed rodent damage as non-warranty event despite wires being inadequately protected.
Airbag Non-Deployment in Crashes
Multiple crash reports where airbags did not deploy despite significant impact. One crash at 65 mph involved vehicle drifting left and hitting guard rail; another involved vehicle struck at 30–35 mph perpendicular impact with significant structural damage; one involved frontal head-on collision at 50+ mph. In each case, airbags remained stowed. One rear-quarter side impact at unknown speed caused rear airbags to fail deployment. These are distinct from sensor faults—these are actual non-deployment events during crashes.
When: Failure mileage 34,000 miles (complaint #10, 65 mph guardrail crash); 10,000 miles (complaint #11, unintended acceleration crash); 50,100 miles (complaint #40, unexplained deployment); impact events at various mileage/timing unclear in some cases
Symptoms owners cite: No airbag deployment during high-impact crash (side impact, frontal, rear quarter); Vehicle damage consistent with significant impact but airbags inert; Occupants uninjured or minimally injured despite high-speed impact; No warning light or notification prior to crash; Police reports filed but no manufacturer investigation completed
Codes mentioned:
Repairs/costs cited: Vehicles towed but not repaired or diagnosed by Tesla. No parts costs cited because manufacturer did not investigate or repair.
Recalls/TSBs owners mention: Manufacturer not notified in two cases (complaints #10, #11). No investigation completed. One case (complaint #40) sent to manufacturer for investigation but no resolution made and vehicle not repaired as of complaint date.
Airbag Deployment Without Impact (Unintended Deployment)
Airbags deployed while vehicle was stationary or during minor/no-impact events. One complaint describes driver-side airbags deploying in garage while parking, with vehicle also experiencing unintended acceleration into wall twice and then auto-parking on neighbor's driveway. Another complaint (complaint #27) describes airbags deploying while driving normally on road, with vehicle showing 'crash detected' alert but no collision occurring.
When: Complaint #27 timing unknown; complaint #28 during parking maneuver in garage
Symptoms owners cite: Airbags deployed without collision or impact; Vehicle screen showed 'crash detected' but no crash occurred (complaint #27); Vehicle battery fully drained after deployment (complaint #27, charged 71% before event); Steering and foot-well airbags deployed during garage parking event (complaint #28)
Codes mentioned:
Repairs/costs cited: Complaint #27: no repair made, vehicle towed. Complaint #28: front damage extensive, vehicle was repaired (implied), but no detail on airbag system repair or root cause analysis provided.
Recalls/TSBs owners mention: Complaint #27: no manufacturer response noted. Complaint #28: owner asked Tesla to investigate if Autopilot caused unintended acceleration; no response received after more than a week.
Occupant Weight Sensor Malfunction
Passenger-side occupancy sensor fails to detect occupant weight above 100 lbs threshold or fails to activate airbag despite passenger in seat. One owner reports wife weighing ~120 lbs but airbag failed to activate on multiple occasions despite Tesla performing two hands-on inspections and one remote inspection. Tesla claims system working as intended but offers no solution. Another complaint describes loud warning beep every 5 minutes, attributed to malfunctioning occupant weight sensor determining if occupant present.
When: No specific mileage or timing provided
Symptoms owners cite: Airbag fails to activate despite passenger occupying seat (weight >100 lbs); Multiple service inspections unable to identify or resolve issue; Loud warning beep every 5 minutes while driving (complaint #9); Tesla suggests clothing may cause problem but provides no solution
Codes mentioned:
Repairs/costs cited: Complaint #8: no repair completed; owner reports Tesla unable to resolve after 4 service actions and 3 inspections. Complaint #9: Tesla quotes >$750 to replace entire sensor, requires seat teardown; owner states error 'happening in most 2019 Model 3s.'
Recalls/TSBs owners mention: Tesla claims system working as intended (complaint #8). Tesla offers sensor replacement at cost ($750+) but claims cannot fix via software update (complaint #9).
Wiring Damage from Rodent Intrusion
Wires under vehicle (specifically restraint system harness) damaged by rodent chewing. Wires covered only in cheap plastic tape, inadequate to prevent rodent access. Failure causes restraint system faults and airbag malfunction warnings.
When: Reported around 49,000 miles (complaint #2)
Symptoms owners cite: 'Faulty Restraint System Fault' warning at 49k miles; Visible wire chewing damage documented by Tesla service; Error pop-up stating 'service needed'; Many driving problems with airbags not working and speedometer errors (complaint #2 allegation)
Codes mentioned:
Repairs/costs cited: Tesla initially quoted $384 for harness wire repair. After inspection, Tesla claimed rodent damage not covered under warranty; owner paid $180 out-of-pocket.
Recalls/TSBs owners mention: Tesla denied warranty coverage, classifying rodent damage as non-covered event despite inadequate wire protection design. No design change or protective program offered.
Synthesized from 59 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 0 most recent
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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 2019 Tesla Model 3?
It's a meaningful issue. 59 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 59 complaints filed, airbags issues most often appear around 18,767 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/2019/Tesla/Model 3.
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.