2023-2025 Honda Civic Type R ANC Module: Fixing Buzzing & Fake Engine Noise
Your definitive guide to diagnosing, replacing, and understanding the Active Noise Cancellation (ANC) and Active Sound Control (ASC) unit in the FL5 Type R.
- This module (39200-T43-A712) is ONLY for the Civic Type R; it will not work in other Civic trims.
- The module is plug-and-play and does NOT require any dealer programming or initialization after replacement.
- A buzzing sound on acceleration may be the intended 'Active Sound Control' function, not a defect. This can be tested by changing drive modes.
- If you install an aftermarket amplifier or subwoofer, you will likely need to unplug this module to prevent severe audio interference and noise.
Vehicle Fitment and Compatibility Warnings
Warning: This Active Noise Cancellation / Active Sound Control module, part number 39200-T43-A712 (also listed as 39200T43A71), is specifically for the 2023-2025 Honda Civic Type R (FL5) model only. It will not function correctly in other Civic trims like the LX, Sport, EX, Si, or Hybrid models. Those trims use a different, less expensive module (part number 31600-T56-A01) that does not have the Type R's specific Active Sound Control programming. Always verify the part number on your original module before purchasing a replacement.
Symptoms of a Failing or Malfunctioning ANC Module
A problem with the ANC/ASC module can manifest in several ways, ranging from annoying sounds to a simple loss of function.
Unwanted Noises (Buzzing, Hissing, Droning)
The most common complaints are related to new or unusual sounds. A malfunctioning module can fail to properly cancel noise or may introduce its own electronic interference. Symptoms include:
- A persistent electronic buzzing or humming sound that may change with engine RPM.
- Popping or crackling from the vehicle's speakers.
- A low-frequency droning or booming sound that wasn't there before.
Increased Cabin Noise
If the noise-canceling portion of the module fails entirely, you may notice an increase in low-frequency road and engine noise inside the cabin. The car will simply sound louder and may have more 'boom' or drone at highway speeds than it used to. This is because the system is no longer actively canceling out those frequencies.
Interference with Aftermarket Stereos
Pro Tip: If you have installed an aftermarket amplifier or subwoofer and are now hearing a strange hiss, whine, or low-frequency rumble, the factory ANC module is the most likely cause. The module attempts to 'cancel' the new sounds from your aftermarket system, resulting in interference. The standard fix is to simply unplug the ANC module.
Is It Broken, or Is It Just Active Sound Control?
For the Civic Type R, many owners report a buzzing or synthesized engine noise, especially during acceleration. In many cases, this is not a sign of a broken part but is the intended function of the Active Sound Control (ASC) system. The system is designed to enhance the engine sound inside the cabin. Many owners find this artificial noise undesirable.
Before assuming your module is faulty, try changing the vehicle's drive mode. The level of sound enhancement is typically reduced in 'Comfort' mode and increased in 'Sport' and '+R' modes. If the buzzing sound changes or disappears when you switch modes, your module is likely working as designed.
Buying a Used Active Noise Cancellation Module
A used OEM module is an excellent, cost-effective alternative to a new part, as this component is not a common wear item and does not require programming.
Verify the Part Number
This is the most critical step. Ensure the used module you are buying has the exact part number: 39200-T43-A712 or 39200T43A71. Do not purchase a module from a standard Civic, as it will not be compatible with the Type R's systems.
Physical Inspection
When the part arrives, inspect it carefully. Look for:
- Connector Pins: Check that the pins in the electrical connector are straight, clean, and free of corrosion.
- Casing: The plastic case should be free of cracks or signs of being pried open.
- Water Damage: Look for any chalky residue or discoloration that could indicate past water intrusion.
Why Choose Used OEM?
For an electronic module like this, a tested, recycled OEM part is often the best value. It is identical to the part sold at the dealership but at a fraction of the price. Since it is a plug-and-play component, a functional used unit will perform exactly the same as a new one. Aftermarket versions of this specific, complex module are not available.
Programming and Installation
No Programming Required: This module is a plug-and-play component. It does not need to be programmed, flashed, or initialized by a dealer after installation. You can simply swap the part and it will function immediately.
Location
The ANC/ASC module is located in the center of the dashboard. On similar Honda models, it is typically found behind the glove box or attached to a bracket in the driver's or passenger's footwell area, high up under the dash.
Replacement Steps
- Disconnect the negative battery terminal.
- Access the module by removing the necessary lower dash panels or the glove box assembly.
- Locate the module. It is a small black or gray plastic box with at least one electrical connector.
- Carefully press the release tab on the electrical connector(s) and unplug them.
- Unbolt or unclip the module from its mounting bracket.
- Install the replacement module, plug in the connector(s), and reassemble the dash panels.
- Reconnect the battery terminal.
Related Known Issues, TSBs, and Recalls
While there are no specific recalls or Technical Service Bulletins (TSBs) for the ANC module itself, owners of 2023-2025 Civics should be aware of other issues that can cause noises or electrical concerns:
- Steering Gearbox Recall (NHTSA 24V-744): A widespread recall was issued in October 2024 for a steering gearbox defect that could cause sticky steering or abnormal noises when turning.
- Driver's Seat Weld Issue: A stop-sale was issued for some 2023 Type R models due to improper welds on the driver's seat frame, which could lead to squeaks and rattles.
These issues can produce noises that might be mistaken for a problem with the audio or ANC system.
Cost of Replacement
| Part Type | Price Range |
|---|---|
| New OEM | $240 - $360 |
| Used OEM | $50 - $100 |
| New Aftermarket | Not Available |
| Shop Labor | $100 - $200 |
Frequently Asked Questions (FAQ)
Does the 2023-2025 Civic Type R ANC module need to be programmed?
No. This is a plug-and-play module that does not require any programming, flashing, or dealer initialization. Simply install it, and it will work correctly.
Where is the Active Noise Cancellation module located?
The module is located in the center dash area, typically accessible by removing the glove box or lower dash trim panels.
Can I just unplug my ANC module to get rid of the fake engine noise?
Yes. Many owners who dislike the Active Sound Control (ASC) feature or who have installed aftermarket audio systems simply unplug the module. This will disable both the noise cancellation and the sound enhancement features without causing any warning lights or other issues.
What is the difference between Active Noise Cancellation (ANC) and Active Sound Control (ASC)?
They are two functions of the same module. ANC is subtractive—it listens for undesirable cabin drone and removes it. ASC is additive—it creates a desirable, synthesized engine sound and adds it to the cabin for a sportier feel.
Technical Specifications
OEM Part Numbers: 39200-T43-A712 39200T43A71
Functions as both an Active Noise Cancellation (ANC) and Active Sound Control (ASC) unit. Plug-and-play installation.
We Have This Part in Stock
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.
- Honda Civic:
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- Vehicle Fitment and Compatibility Warnings
- Symptoms of a Failing or Malfunctioning ANC Module
- Unwanted Noises (Buzzing, Hissing, Droning)
- Increased Cabin Noise
- Interference with Aftermarket Stereos
- Is It Broken, or Is It Just Active Sound Control?
- Buying a Used Active Noise Cancellation Module
- Verify the Part Number
- Physical Inspection
- Why Choose Used OEM?
- Programming and Installation
- Location
- Replacement Steps
- Related Known Issues, TSBs, and Recalls
- Cost of Replacement
- Frequently Asked Questions (FAQ)
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