2021-2022 Honda CR-V Hybrid Active Noise Cancellation Module Explained

Is This a Body Control Module (BCM)?

No, this is a common point of confusion. The part number 39200-TPG-A51 is for the Active Noise Cancellation (ANC) Control Unit, sometimes called a noise filter. It is a dedicated computer for the sound-canceling system only. The main Body Control Module (BCM) is a completely separate part (like part number 38809-TLC-A21) that is responsible for controlling functions like your power windows, door locks, interior and exterior lights, and wipers. If you are experiencing issues with those systems, you likely need a BCM, not this ANC module.

Symptoms of a Failing ANC Module

Failure of the ANC system can be subtle and often does not trigger a Check Engine Light. The most common symptoms are sound-related:

• Booming or Rumbling from Speakers: A constant, low-frequency booming, humming, or rumbling sound that comes through the car's speakers, even when the radio is off. This can be caused by a failure in the module itself or, more commonly, by one of the ANC microphones feeding it bad information. Honda has issued a Technical Service Bulletin (TSB 22-014) for other models with this system for this exact symptom, noting it can be caused by damaged microphone foam.
• Interference with Aftermarket Subwoofers: This is the most widely reported issue. If you install an aftermarket subwoofer, the ANC module interprets the new bass as an unwanted engine noise and tries to cancel it. This results in the subwoofer's bass cutting in and out, sounding weak, or producing a strange humming or oscillating tone. 🎬 See how to eliminate subwoofer rumbling by bypassing the ANC For this reason, most car audio installers will simply unplug the ANC module.
• High-Pitched Whine or Dizziness: In rare cases, some individuals with sensitive hearing may perceive the ANC's operating frequency as a faint, high-pitched electronic whine. Others have reported feeling a sense of pressure or dizziness, similar to wearing noise-canceling headphones.

Buying a Used 2021-2022 CR-V ANC Module

This module is an excellent candidate for a used OEM part. Because it is a simple electronic unit without complex programming, a used module from a reputable recycler offers significant savings with very low risk.

• No Programming Required: This is the most important factor. Unlike an Engine Control Module (ECM) or Body Control Module (BCM), the ANC module does not need to be programmed or flashed to your vehicle's VIN. It is a plug-and-play part. The common practice of unplugging it for audio installs and plugging it back in later confirms it does not require a dealer visit.
• Verify the Part Number: Ensure the part you are buying is 39200-TPG-A51 to guarantee a perfect match for your 2021-2022 CR-V Hybrid.
• Physical Inspection: When buying a used module, check for any signs of physical damage, especially to the connector pins. Ensure the housing is not cracked and there are no signs of water intrusion.
• Why Used OEM is a Smart Choice: There are no common aftermarket or remanufactured versions of this specific module. A used OEM unit is a reliable and cost-effective way to restore the system's function if it has failed.

Cost Breakdown for Replacement

Below is an estimated cost comparison for replacing the ANC module. Prices can vary by region and supplier.

DIY Replacement Guide

Replacing the ANC module is a straightforward job that most DIY mechanics can complete in under an hour. The module is located behind the glove compartment.

1. Disconnect the Battery: As a safety precaution, always disconnect the negative terminal of your 12-volt battery before working on electronic components.
2. Access the Module: Open the glove box. You may need to remove a lower trim panel held in by clips. On some models, you can simply unhook the glove box stops and let it swing all the way down to get access. On others, you may need to remove a few Phillips head or 10mm screws to remove the glove box assembly.
3. Locate and Unplug: The ANC module is a small silver or black box mounted to a bracket. It will have a single electrical connector. Press the release tab on the connector and pull it straight out.
4. Remove the Module: The module is typically held in place by one or two 10mm bolts. Remove these bolts and take the old module out.
5. Install the New Module: Bolt the replacement module into place, plug in the electrical connector, and reassemble the glove box and any trim panels you removed. Reconnect the battery.

Frequently Asked Questions (FAQ)