2015-2020 Acura TLX Radio Amplifier: Solving No Sound and Audio Glitches
Your complete guide to diagnosing common audio failures, understanding part numbers, and replacing the radio amplifier in your Acura TLX.
- The most common failure symptom is a complete loss of sound while the infotainment screen still functions.
- This amplifier is for TLX models with navigation and is located in the passenger-side kick panel.
- Replacement is plug-and-play; no dealer programming is required if you use a compatible OEM part number.
- Before replacing the amplifier, investigate TSBs for popping/crackling noises, as the issue may be a simpler fix involving network connectors.
Symptoms of a Failing Acura TLX Radio Amplifier
When the radio amplifier in a 2015-2020 Acura TLX begins to fail, the symptoms are often hard to miss. While the main infotainment screen may still power on and appear to function normally, the audio output is directly affected. Here are the most common signs of a bad amplifier:
- Complete Loss of Sound: This is the most definitive symptom. The radio, Bluetooth, and navigation all appear to work on the screen, but no sound comes from any of the speakers.
- Popping or Crackling Noises: Loud, intermittent pops or a constant crackling sound can occur, even at low volumes or when the audio is muted. This can sometimes be caused by loose MOST bus network connectors, a known issue in some Acura models.
- Distorted or Muffled Audio: Sound may be fuzzy, weak, or unclear from all speakers, indicating the amplifier is failing to process or power the signals correctly.
- Sound from Only One Side: One or more channels of the amplifier may fail, leading to sound playing from only the left or right side of the vehicle.
- Infotainment System Glitches: In some cases, a failing amplifier can cause the entire infotainment system to lag, freeze, or reboot unexpectedly due to communication errors on the vehicle's network.
Known Issues, TSBs, and Recalls
While there are no specific recalls for the radio amplifier on the 2015-2020 TLX, Acura has issued Technical Service Bulletins (TSBs) for related audio issues that can mimic amplifier failure. Notably, TSBs like 21-032 address popping or crackling sounds, blank displays, or no audio, which are sometimes caused by loose MOST bus network (FAKRA) connectors rather than a complete amplifier failure. This issue is common across several Acura models and involves installing an updated connector set. It's worth investigating this possibility before replacing the entire amplifier, as it can be a simpler and less expensive fix.
Pro Tip: Before condemning the amplifier, check for audio-related TSBs with your dealer. A software update or a connector repair might solve your problem without needing to replace the expensive amplifier module.
Buying a Used 2015-2020 TLX Radio Amplifier
A used OEM amplifier is often the most cost-effective solution for a failed unit. Since aftermarket replacements for this specific, integrated module are not common, a reliable used part can save you hundreds of dollars compared to a new one from the dealer. Here’s what to look for:
- Verify the Part Number: This is the most critical step. The amplifier must have the correct part number for your vehicle's year and trim. Known part numbers include 39186-TZ3-A11, 39186-TZ3-A12, and 39186-TZ3-A13. The later numbers (A12, A13) are typically newer revisions that supersede the older ones and are generally interchangeable. Always match the part number on your original unit to the replacement.
- Check for Navigation Compatibility: This amplifier is for TLX models equipped with a factory navigation system. Ensure the donor vehicle had the same audio system configuration.
- Physical Inspection: When you receive the used amplifier, inspect the casing for any signs of physical damage or corrosion. Pay close attention to the electrical connector ports. The pins should be straight, clean, and free of any green or white residue that would indicate water damage.
- Source and Warranty: Purchase from a reputable seller that offers a warranty. A 30-day or longer warranty gives you time to install the part and confirm it functions correctly. Used parts from dismantlers often come with a 1-year warranty.
Programming and Installation
Important: The radio amplifier in the 2015-2020 Acura TLX is a computer module that is part of the vehicle's networked systems. However, based on owner experiences and replacement procedures, it does not typically require special programming or flashing by a dealer after installation. It is considered a plug-and-play replacement, provided you use a compatible OEM part number.
The amplifier is located in the passenger-side (RH) front kick panel area, making it relatively easy to access.
- Disconnect the Battery: Before starting any electrical work, disconnect the negative terminal of your vehicle's battery.
- Access the Amplifier: Remove the passenger-side door sill plate and the kick panel trim. The amplifier is mounted vertically against the side of the car, sometimes partially behind the glove box.
- Remove the Amplifier: The amplifier is held in place by three 10mm bolts. After removing the bolts, carefully pull the unit out to access the electrical connectors.
- Swap the Connectors: Disconnect the wiring harnesses from the old amplifier and plug them into the new unit. The connectors are keyed and will only fit in their correct positions.
- Install and Test: Bolt the new amplifier in place, reinstall the trim panels, reconnect the battery, and test the audio system.
Cost Comparison for a 2015-2020 TLX Radio Amplifier
| Part Type | Estimated Cost |
|---|---|
| New OEM | $610 - $915 |
| Used OEM | $55 - $150 |
| New Aftermarket | $565 - $665 (Specialty audio upgrade) |
| Shop Labor | $100 - $200 |
Frequently Asked Questions (FAQ)
Does the 2015-2020 TLX amplifier need to be programmed by a dealer?
No, this amplifier is generally considered plug-and-play. As long as you replace it with a unit that has a compatible OEM part number, no special programming or dealer visit should be required. The system should recognize the new module upon startup.
Where is the radio amplifier located on the Acura TLX?
The amplifier is located behind the trim in the front passenger-side footwell, also known as the right-hand (RH) kick panel.
Can I replace the TLX amplifier myself?
Yes, this is a DIY-friendly job for someone with basic mechanical skills. Accessing and replacing the amplifier requires removing a few interior trim panels and unbolting the unit. The entire process can typically be completed in under an hour.
What is the difference between part numbers 39186-TZ3-A11, A12, and A13?
These numbers represent different revisions of the same part. Typically, a higher final digit (e.g., A13) indicates a newer version that supersedes the previous ones (A11, A12). They are generally interchangeable, but it's always best practice to use the newest revision available that is listed as compatible with your vehicle year.
My speakers are crackling. Is it always the amplifier?
Not always. Acura has a known issue with loose FAKRA connectors in the audio network that can cause popping and crackling sounds. This is a less expensive fix and should be investigated before replacing the entire amplifier. A TSB was issued to address this problem.
Technical Specifications
OEM Part Numbers: 39186-TZ3-A11 39186-TZ3-A12 39186-TZ3-A13 39186TZ3A11 39186TZ3A12 39186TZ3A13
For models with factory navigation system. Location: Passenger side (RH) kick panel.
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.
- Acura TLX: