2019-2021 Acura RDX Air Bag Control Module: Recalls, Replacement, and Programming
This guide covers the critical details you need to know about diagnosing, replacing, and programming the SRS airbag module in your 2019-2021 Acura RDX.
- A replacement airbag module (new or used) MUST be programmed to your vehicle's VIN to function.
- Do NOT buy a used module from a vehicle that had its airbags deployed, as it will contain locked crash data.
- An illuminated SRS light means the entire airbag system is disabled and will not work in an accident.
- Check for the open recall on the passenger seat weight sensor, as this can cause the SRS light to come on and is a free repair at the dealer.
Symptoms of a Failing Air Bag Control Module
The most common and immediate sign of a problem with the airbag control module is an illuminated SRS warning light on your dashboard. This light indicates that the system has detected a fault and has been disabled as a safety precaution. While the light can point to issues with sensors or other components, it often indicates a problem within the module itself.
- SRS Warning Light: A persistent airbag warning light on the instrument cluster is the primary symptom. The system performs a self-check every time you start the car; if the light stays on, there's a fault.
- Failure to Pass Inspection: A vehicle with an active SRS light will not pass a state safety inspection.
- No Communication with Scan Tools: In some cases of internal failure, a diagnostic scan tool may be unable to communicate with the SRS module.
- Stored Fault Codes: An OBD-II scanner capable of reading SRS codes can pull specific trouble codes. Codes like B0001, B0002, or those indicating an "Internal Failure" or "Crash Event Stored" point directly to the module. A common code related to a recent recall is U3000-49.
Known Issues, Recalls, and Technical Service Bulletins (TSBs)
For the 2019-2021 Acura RDX, there is a significant safety recall that involves a component of the SRS system, though not the module itself directly. It's crucial to check if your vehicle is affected, as the symptoms can mimic a module failure.
NHTSA Recall: Front Passenger Seat Weight Sensor Failure
In May 2026, Honda issued a recall for a vast number of Honda and Acura vehicles, including the 2019-2024 RDX. The front passenger seat weight sensor can potentially crack and short circuit. This defect can cause the SRS warning light to illuminate and, more critically, may cause the passenger airbags to deploy improperly or not at all during a crash, increasing the risk of injury.
- NHTSA Recall Number: This recall is an expansion of a previous one (24V064).
- Affected Vehicles: Includes 2019-2024 Acura RDX models.
- Symptom: The SRS warning light will turn on. You may also see the passenger airbag indicator showing "OFF" even with an adult in the seat.
- Remedy: Dealers will replace the seat weight sensors free of charge.
- Associated DTC: Service bulletins related to this recall mention the diagnostic trouble code U3000-49.
Pro Tip: Before assuming the airbag control module has failed, have an Acura dealer check your Vehicle Identification Number (VIN) to see if it's affected by this or any other open recalls. The repair is performed at no cost and may solve your SRS light issue.
Buying a Used Air Bag Control Module for Your 2019-2021 RDX
Purchasing a used SRS module can be a cost-effective solution, but it requires careful attention to detail to ensure you get a functional, safe part. The single most important factor is the part's history.
Warning: Never install a module from a vehicle that has been in an accident where airbags were deployed. These modules store "crash data" which permanently locks the unit. This crash data cannot be cleared with a standard diagnostic tool and renders the module useless until it is reset by a specialized service.
- Verify Part Numbers: Match the part number exactly. The primary OEM numbers for this generation RDX include 77960-TJB-A04 and 77960-TJB-A21. Part number 77960-TJB-A04 is listed as a replacement for earlier versions like -A02 and -A03. Always confirm with the seller.
- Source is Key: Buy only from reputable auto recyclers who can guarantee the module came from a vehicle with no airbag deployment. Ask for the VIN of the donor vehicle to run a history report if possible.
- Physical Inspection: When you receive the part, inspect the housing for any cracks or signs of damage. Check the electrical connector pins for any corrosion, which could indicate water damage. A module that has been exposed to moisture is unreliable.
- Crash Data Reset Services: If you acquire a module with crash data, it is not garbage. You can send it to a specialized mail-in service that will clear the internal crash data from the EEPROM chip, effectively making it "plug-and-play" without the need for VIN programming at a dealer. This is often cheaper than buying a new module.
Programming and Installation
Warning: The Supplemental Restraint System (SRS) is a high-voltage, critical safety system. Always disconnect the negative battery terminal and wait at least 3-5 minutes before beginning any work to allow the system's capacitors to discharge. Failure to do so can result in accidental airbag deployment and serious injury.
Yes, a replacement airbag control module must be programmed to the vehicle. A new or used module will not function correctly until it is configured for your specific vehicle's VIN and options.
- Location: The SRS control module in the 2019-2021 Acura RDX is located under the center console, often accessible by removing a side panel near the gas pedal area.
- Who Can Program It?
- Acura Dealer: The dealer has the proprietary Honda Diagnostic System (HDS) software required to program a new module to the vehicle.
- Independent Shops: Many independent repair shops with high-end diagnostic tools (like Autel or Snap-on) can perform SRS module configuration and resets.
- DIY: Programming a new module is not a DIY-friendly task. However, if you use a mail-in service to reset your original module or a used one, it often comes back ready to install without needing further programming.
- Hard Codes vs. Soft Codes: A standard OBD-II scanner can clear "soft codes" (minor faults). However, "hard codes" resulting from airbag deployment cannot be cleared with a scanner; the module must be replaced or have its internal memory professionally reset.
Cost Comparison
The cost to replace the airbag control module can vary significantly based on whether you choose a new, used, or reset part.
| Part Type | Estimated Cost |
|---|---|
| New OEM | $375 - $660 |
| Used OEM (Guaranteed No Crash Data) | $100 - $250 |
| Module Reset Service (Mail-in) | $50 - $150 |
| Shop Labor (Installation & Programming) | $130 - $230 |
Frequently Asked Questions (FAQ)
Can I drive my RDX with the airbag light on?
No. While the vehicle will drive, the airbag light indicates that the entire Supplemental Restraint System is disabled. In the event of an accident, the airbags and seat belt pretensioners will not deploy, significantly increasing the risk of injury. It should be serviced as soon as possible.
Where is the airbag control module located on a 2019-2021 Acura RDX?
The SRS control module is typically located under the center console, bolted to the floor of the vehicle. On many Acuras of this era, it can be accessed by removing a side trim panel in the driver or passenger footwell, near the front of the console.
Will a used airbag module from a junkyard work?
It can, but only if it meets specific criteria. The module must be the exact same part number and, most importantly, must come from a vehicle where the airbags did not deploy. A module from a crashed car will contain locked crash data and will not work. It will also require programming to your vehicle's VIN.
Can I reset the airbag light myself after a repair?
It depends on the fault. If the light was on due to a minor issue (a "soft code"), a capable OBD-II scanner may be able to clear it. However, if the light is on due to a component failure or stored crash data (a "hard code"), it cannot be reset with a standard scanner. The underlying problem must be fixed and the module may need professional service or replacement.
Technical Specifications
OEM Part Numbers: 77960-TJB-A210 77960-TJB-A21 77960-TJB-A04 77960-TJB-A03 77960-TJB-A02
The module is located under the center console and is typically secured with T30 Torx bolts.
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The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- Acura RDX:
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- Symptoms of a Failing Air Bag Control Module
- Known Issues, Recalls, and Technical Service Bulletins (TSBs)
- NHTSA Recall: Front Passenger Seat Weight Sensor Failure
- Buying a Used Air Bag Control Module for Your 2019-2021 RDX
- Programming and Installation
- Cost Comparison
- Frequently Asked Questions (FAQ)
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