2020 Honda Odyssey Amplifier: Fixing Pops, Crackles, and No-Sound Issues
Your guide to diagnosing audio failures, finding the right used amplifier, and understanding the critical MOST bus wiring problem before you buy.
- Many audio issues are caused by a faulty wiring connector covered by a recall (NHTSA 23V-413) and TSB (20-049), not a bad amplifier. Check your VIN for open recalls first.
- This specific amplifier (39886-THR-A51) ONLY fits 2020 Odyssey EX-L models WITHOUT the factory navigation system.
- Symptoms of failure include total sound loss, loud popping/crackling, and a "Network Loss" message on the screen.
- A used OEM amplifier is a cost-effective, plug-and-play solution, as no direct-fit aftermarket alternatives are available.
Is It Your Amplifier or Just a Loose Wire?
Important: Many audio problems in the 2020 Honda Odyssey are NOT caused by a failed amplifier. Honda has identified a widespread issue with faulty wiring connectors in the audio network. Before you buy a replacement amplifier, check for open recalls on your vehicle.
A Technical Service Bulletin (TSB 20-049) and a safety recall (NHTSA Campaign 23V-413) address a problem with the Media Oriented Systems Transport (MOST) bus network. The connectors, known as FAKRA connectors, can become loose or fail, causing a loss of communication between the radio, amplifier, and instrument panel. This results in symptoms identical to a failed amplifier. The fix involves repairing or replacing these connectors, not the amplifier itself. Have a Honda dealer check your VIN to see if this free repair applies to your vehicle first.
Symptoms of a Failing Amplifier or MOST Network Issue
Diagnosing an audio issue can be tricky because both a bad amplifier and a MOST network fault present nearly identical symptoms. Look for these common signs:
- Complete Loss of Sound: The most common symptom is when the radio display works perfectly, but no sound comes from any speaker.
- Popping and Crackling: Loud, static-like pops or crackles may occur intermittently, even if the audio system is turned off. This can be very distracting and is a hallmark of the FAKRA connector issue.
- "Network Loss" Message: The infotainment screen may display a "Network Loss" or "No Audio Connection" error message as it loses its connection to the amplifier.
- Intermittent Audio: Sound may cut in and out randomly while driving.
Diagnosing the Problem: A Step-by-Step Guide
- Check for Recalls: This is the most important first step. Use your Vehicle Identification Number (VIN) on Honda's recall website or the NHTSA website to see if the MOST coaxial cable recall is open for your van. If it is, a dealer will perform the repair for free, which will likely solve your audio problem.
- Check the Fuses: While less common for these symptoms, it's always wise to check the fuses related to the audio system and amplifier. A blown fuse can cause a complete loss of power to the amp. Your owner's manual will have a diagram of the fuse panels, which are typically located in the engine bay and inside the cabin.
- Consider the TSBs: If the recall doesn't apply or has already been done, the issue could still be the amplifier. Honda issued TSB 22-027 for a condition where an "Audio amplifier software error" causes sound to stop, with the official repair being to replace the amplifier. This confirms that the amplifier itself can fail, though it seems less common than the wiring issue.
Buying a Used 2020 Odyssey Amplifier
If you've ruled out wiring issues and determined the amplifier is faulty, a used OEM unit is an excellent, cost-effective choice. There are no direct-fit aftermarket amplifiers for this system, making a used part the best plug-and-play solution.
Verify Compatibility Above All Else
Warning: This amplifier, part number 39886-THR-A51, fits 2020 Honda Odyssey EX-L models WITHOUT the factory navigation system only. It will not work on trims with the premium 11-speaker audio system (Elite) or those with factory navigation. Before ordering, confirm your vehicle's trim and check that your infotainment screen does not have a "Navi" button or option.
Physical Inspection Checklist
When your used amplifier arrives, inspect it carefully before installation:
- Connector Pins: Check the ports for the FAKRA connectors and other plugs. Look for any signs of corrosion (white or green powder), which indicates past moisture exposure.
- Casing: Ensure the metal casing is not dented, cracked, or showing signs of being pried open.
- Mounting Tabs: Verify that all mounting points are intact and not broken, as this is essential for a secure, rattle-free installation.
Cost Comparison
Here is an estimated cost breakdown for replacing the audio amplifier. Prices can vary based on supplier and location.
| Part Type | Estimated Cost |
|---|---|
| New OEM | $930 - $1,400 |
| New Aftermarket | Not Available |
| Used OEM | $150 - $300 |
| Shop Labor | $100 - $175 |
Replacement Overview
- Difficulty: 3/5 (Moderate)
- Estimated Time: 1 hour
- Tools Needed: Panel removal tool, Phillips screwdriver, 10mm socket and ratchet.
The amplifier is located behind the trim panel in the right rear cargo area (passenger side). The replacement process involves:
- Disconnecting the negative battery terminal.
- Removing the rear cargo floor sill plate.
- Removing several hook bolts and screws holding the right side cargo trim panel.
- Carefully prying away the trim panel to gain access to the amplifier bracket.
- Disconnecting the electrical connectors from the amplifier.
- Unbolting the amplifier from its mounting bracket.
- Installation is the reverse of removal. Take care to reconnect all connectors securely.
Technical Specifications and Part Numbers
| Specification | Value |
|---|---|
| OEM Part Numbers | 39886-THR-A51, 39886THRA51M1 |
| Common Name | Amplifier & Tuner Unit |
| Vehicle Fitment | 2020 Honda Odyssey |
| Trim Fitment | EX-L without factory navigation |
Frequently Asked Questions (FAQ)
Do I need to program a replacement amplifier?
Generally, no. This amplifier is considered a plug-and-play part, and Honda's service procedures for replacement do not call for programming. However, some sellers of used electronics note that programming may be required, though it is unlikely for this component.
How do I know if my Odyssey has the factory navigation system?
The easiest way to check is to look at your infotainment system's home screen. If you have the factory navigation system, there will be a dedicated icon or button labeled "Navigation" or "Navi." If you do not see this option, your vehicle does not have factory navigation, and this amplifier should be compatible (assuming you have the EX-L trim).
What is the difference between the audio systems in the Odyssey trims?
The EX and EX-L trims use a 160-watt, 7-speaker system that is powered by this tuner-amplifier unit. The top-tier Elite trim has a completely different 550-watt, 11-speaker premium audio system with a separate, more powerful amplifier and is not compatible with this part.
Could my audio problem just be a bad speaker?
A single bad speaker will typically only affect sound from that one location. If you are experiencing a total loss of sound from all speakers, or intermittent popping and crackling from multiple speakers at once, the problem is almost certainly with the amplifier or the MOST network wiring, not an individual speaker.
Technical Specifications
OEM Part Numbers: 39886-THR-A51 39886THRA51M1
Combined tuner and amplifier unit for the 7-speaker, 160-watt audio system.
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 ODYSSEY:
- 🛍️ Shop This Part
- Is It Your Amplifier or Just a Loose Wire?
- Symptoms of a Failing Amplifier or MOST Network Issue
- Diagnosing the Problem: A Step-by-Step Guide
- Buying a Used 2020 Odyssey Amplifier
- Verify Compatibility Above All Else
- Physical Inspection Checklist
- Cost Comparison
- Replacement Overview
- Technical Specifications and Part Numbers
- Frequently Asked Questions (FAQ)
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