2012-2014 Hyundai Azera Amplifier: Fixing No Sound from the Infinity System

Symptoms of a Failing Amplifier

When the factory amplifier begins to fail, it can cause a range of audio problems. While some issues can be intermittent at first, they typically worsen over time, leading to a complete loss of sound. Here are the most common signs of a bad amplifier in your Azera:

• Complete Loss of Sound: The most frequent symptom is no audio from any speaker, even though the radio head unit appears to be working perfectly. This includes AM/FM radio, satellite radio, CD, and Bluetooth audio.
• Loud Popping or Crackling: A loud pop or crackle from the speakers upon startup or shutdown, or intermittently while driving, can indicate failing internal components in the amplifier.
• Distorted or Muffled Audio: If the sound from all speakers is fuzzy, distorted, or unclear even at low volumes, the amplifier may be failing to regulate power correctly.
• Sound Cutting In and Out: The audio may work for a while and then suddenly cut out, sometimes returning after the car has been turned off and on again. This can be related to the amplifier overheating or having a poor electrical connection.
• Loss of Specific Channels: You might lose sound from a specific group of speakers, such as the front, rear, or the subwoofer, while others continue to work.

Diagnosing the Issue

If a hard reset doesn't solve the problem, you can perform a few checks before replacing the amplifier:

1. Check the Fuses: Verify the fuses related to the audio system. The Azera has fuse panels in the engine bay and inside the cabin. A blown fuse is a simple fix that can cause the amplifier to lose power.
2. Inspect the Amplifier: The amplifier is located in the trunk on the right (passenger) side, behind the carpeted liner. Pull back the liner to access it. Check for any signs of water damage or corrosion on the unit and its electrical connectors. Water leaks in the trunk are a common cause of electronic module failure.
3. Verify Power and Ground: Using a multimeter, you can check for 12V power at the amplifier's main power wire and ensure it has a solid ground connection. A bad ground is a frequent cause of many amplifier problems.

Buying a Used Audio Amplifier

When purchasing a used amplifier, careful verification is crucial to ensure it works correctly in your vehicle. A used OEM unit is often the best choice, as direct-fit aftermarket replacements are not readily available, and installing a universal amplifier requires extensive and costly rewiring.

• Match the Part Number: This is the most critical step. Hyundai used several part numbers for this amplifier, which are considered revisions: 96370-3V200, 96370-3V201, and 96370-3V202. While the later revisions likely supersede the earlier ones, the safest approach is to buy a replacement with the exact same part number as your original unit to guarantee compatibility.
• Inspect for Damage: When buying online, carefully review photos. Look for any signs of corrosion on the aluminum casing or the connector pins, which indicates water damage. Avoid units with dented cases or signs that they have been opened.
• Verify the Source: Purchase from a reputable seller that offers a warranty and has good feedback. This provides protection in case the part is defective.

Replacement and Programming

Replacing the amplifier is a straightforward process that can be done with basic hand tools.

Location: The amplifier is mounted to a bracket on the passenger side of the trunk, behind the trunk liner.

Installation Steps:

1. Disconnect the negative battery terminal.
2. Remove the plastic trunk floor and any cargo nets or trays.
3. Carefully pull back the carpeted trunk liner on the passenger side to expose the amplifier. You may need to remove a few plastic clips or a tie-down hook.
4. Unbolt the three nuts holding the amplifier bracket to the vehicle body.
5. Disconnect the two large electrical connectors from the amplifier. Each has a release trigger that needs to be pressed.
6. Install the replacement amplifier by reversing these steps. The connectors are keyed and will only fit in their correct spots.

Does the amplifier need to be programmed?

No, dealer programming is not required. As long as you use a compatible OEM amplifier for the Infinity system, the unit is plug-and-play. It does not need to be coded to the vehicle's VIN. Some sellers may incorrectly state that programming is needed, but this is generally not the case for this specific component.

Known Issues, Recalls & TSBs

There are no specific recalls or Technical Service Bulletins (TSBs) from Hyundai that directly address widespread failure of the audio amplifier for the 2012-2014 Azera. However, a broader recall (NHTSA Campaign #23V651000) was issued for many Hyundai models, including the 2012-2015 Azera, for a potential electrical short in the ABS module that could lead to a fire. While unrelated to the audio system, it's crucial to ensure this recall repair has been performed on your vehicle.

Cost of Replacement

The cost to replace the Azera's Infinity amplifier can vary significantly depending on the source of the part.

Frequently Asked Questions (FAQ)