2015-2019 Acura TLX Active Noise Cancellation (ANC) Module: Buzzing, Popping, and Replacement
Diagnose common failures, understand replacement costs, and learn why simply unplugging this module is a popular fix for your Acura TLX.
- The most common failure symptom is a popping, buzzing, or humming noise from the speakers, even when the radio is off.
- Many owners choose to simply unplug the module, located under the passenger-side dash, to permanently fix noise issues.
- If replacing the module, ensure the part number is 39200-TZ4-A01 and be prepared for potential programming by a dealer to ensure proper function.
- A faulty ANC module is an annoyance but does not affect the vehicle's safety or drivability.
Symptoms of a Failing ANC Module
When the Active Noise Cancellation module fails, it can create a variety of strange and annoying audio problems. Because the system is tied directly into your car's amplifier and speakers, a bad module can cause issues even when the radio is turned off.
- Popping, Crackling, or Buzzing Noises: The most common symptom is unwanted noise coming from the speakers. This can range from intermittent pops and crackles to a constant, low-frequency hum or buzz. Some owners report this noise is more noticeable at idle or low RPMs.
- Random Loud Bass Notes: A faulty module can send random signals to the subwoofer, creating loud, unexpected bass thumps. This is a frequent complaint from owners who have installed aftermarket subwoofers, as the ANC system tries to cancel noise that isn't there.
- Hissing from Speakers: A constant hissing sound, even with the audio system off, can be a sign of a problem with the ANC module or its integration with the factory amplifier.
- Reduced or Distorted Audio Quality: In some cases, a failing module can interfere with the normal operation of the stereo, causing distorted sound or impacting the bass response of your music.
Known Issues, TSBs, and Recalls
As of mid-2026, there are no specific recalls or Technical Service Bulletins (TSBs) from Acura for the Active Noise Cancellation module itself on the 2015-2019 TLX. However, TSBs for other Acura models and later TLX years point to related issues. For example, TSB B23-030 for the 2021 TLX addresses popping or crackling from speakers due to loose network connectors, which can present similar symptoms. The most widely reported issues come from owner forums where buzzing and popping noises are a common topic.
There are several major recalls for the 2015-2019 TLX, but none relate to the ANC module. These include recalls for potential engine failure due to connecting rod bearing issues on V6 models and a fuel pump failure recall. It is always recommended to check your vehicle's VIN on the NHTSA website for any open recalls.
Pro Tip: Many owners who experience popping or buzzing noises, especially after installing an aftermarket subwoofer, choose to simply unplug the ANC module. This is a common and effective fix that stops the unwanted sounds with no apparent side effects other than losing the noise-cancellation feature. The module is located under the passenger side of the dashboard, above the plastic kick panel.
🎬 Watch: How to locate and unplug the ANC moduleProgramming and Installation
This is a critical point for buyers of a replacement ANC module. While some sellers may list the part as "plug and play," official documentation and best practices for modern vehicle electronics suggest that reprogramming may be necessary for proper function. The module works in conjunction with the vehicle's specific audio system and trim level. A module from a different vehicle may not be calibrated correctly for your car's cabin acoustics and hardware.
For a guaranteed proper repair, the replacement module should be programmed to your vehicle's VIN using the Honda Diagnostic System (HDS) software, which is typically only available at Acura dealerships or specialized independent shops with OEM tools.
Warning: While you can physically install a used module yourself, it may not function correctly without being reprogrammed. One seller explicitly states the module may need to be reprogrammed to the vehicle for interchange. Failure to do so could result in continued audio problems or improper noise cancellation.
Buying a Used Active Noise Cancellation Module
A used OEM module is a cost-effective alternative to a brand-new unit. Since this is an electronic part without moving components, a tested unit from a reputable recycler can be a reliable purchase. Here's what to look for:
- Verify the Part Number: The most common part number for the 2015-2019 TLX is 39200-TZ4-A01. Always match this number exactly to the one on your original module to ensure basic compatibility.
- Inspect for Damage: Check the housing for any cracks or signs of physical damage. Most importantly, inspect the connector pins for any corrosion, moisture, or damage, which could indicate water intrusion.
- Reputable Seller: Purchase from a seller that offers a warranty and has good reviews. This provides protection in case the module is defective.
- Understand Programming Needs: Be prepared for the potential need to have the module programmed by a professional. Factor this potential cost into your budget.
Cost Breakdown
Prices for the Acura TLX ANC module can vary significantly. Labor for replacement is minimal, as the module is relatively easy to access.
| Part Type | Estimated Cost |
|---|---|
| New OEM | $170 - $260 |
| New Aftermarket | Not commonly available |
| Used OEM | $50 - $120 |
| Shop Labor for Installation | $50 - $100 (approx. 0.5 hours) |
Frequently Asked Questions (FAQ)
Where is the ANC module located on a 2015-2019 Acura TLX?
The Active Noise Cancellation module is located under the passenger side dashboard. You can access it by removing the plastic panel underneath the glove box. It is a small silver box with a single wiring connector.
Can I just unplug the ANC module to fix the buzzing noise?
Yes. Many owners and audio installers simply unplug the module to eliminate buzzing, popping, or humming sounds, especially after adding an aftermarket subwoofer. This is a widely accepted workaround that does not trigger any warning lights or fault codes. You will lose the active noise cancelling feature, which may result in slightly more noticeable engine and road noise.
Does a replacement ANC module need to be programmed?
It is highly recommended. While a replacement module might function when plugged in, it may not perform correctly without being programmed to your vehicle's specific VIN and audio configuration. For optimal performance, programming by an Acura dealer or a qualified shop with Honda/Acura diagnostic tools is the best course of action.
Will a bad ANC module drain my car's battery?
While it's not a common complaint for this specific module on the TLX, other modules in Acura vehicles (like the Bluetooth module) have been known 🎬 See how to locate and remove the Bluetooth module to cause parasitic battery drain when they fail. If you are experiencing both strange audio issues and a dead battery, the ANC module could be a potential, though less likely, culprit.
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Technical Specifications
OEM Part Numbers: 39200-TZ4-A01 39200TZ4A01
Fits 2015-2019 Acura TLX, primarily base models with the 2.4L engine.
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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.
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