2016-2026 Audi Poor Bluetooth Voice Quality TSB

Owners of 2016-2026 Audi vehicles may experience an issue with poor Bluetooth voice quality during calls when their iPhone is connected via Bluetooth. This problem, documented in Audi Technical Service Bulletin (TSB) 2078728/1, specifically affects iPhones running iOS versions between 18.0 and 18.4.x. The primary symptom is that the person on the other end of the call reports difficulty understanding the Audi driver, especially in situations with higher vehicle speeds or background noise.

This issue can lead to frustrating communication experiences, making hands-free calling less effective and potentially impacting safety if conversations are unclear. The good news is that this is a known software-related problem with a straightforward solution that does not require any repairs to your Audi vehicle.

Symptoms

If you own a 2016-2026 Audi and use an iPhone, you might notice the following symptoms related to poor Bluetooth voice quality:

• The person you are speaking with during a Bluetooth call complains about your voice quality.
• Your voice sounds muffled, distorted, or difficult to understand to the recipient.
• The problem is more pronounced at higher speeds or when there is other background noise in the vehicle.
• The recipient may only be able to understand you poorly or not at all.

Audi's internal complaint types also indicate broader communication issues that may manifest alongside the primary voice quality concern, such as "functionality -> misfire" or "functionality -> operation complicated" related to telephone operation or cell phone interface display (Apple CarPlay). Other observed issues include "control modules, services -> error message," "no access," "does not start," "no data transfer," "service unavailable," "no function," "operation sequence incorrect," "cannot be activated," and "communication interrupted" within the information, navigation, communication, and entertainment systems.

Diagnosis / Trigger Conditions

Audi's workshop findings confirm that the poor Bluetooth voice quality complaint can be reproduced. Technicians may observe that other phones, not running the affected iOS versions, may have better voice quality when connected to the same vehicle. It's important to note that the TSB clarifies there are no issues with voice quality specifically via Apple CarPlay, distinguishing this problem from other potential communication glitches.

If you are experiencing this problem, checking your iPhone's current iOS version is the first step in diagnosing the cause. The problem is not with your Audi's Bluetooth hardware or software, but rather with how specific iOS versions interact with the vehicle's communication system.

Technical Background

Audi has identified that the root cause of this issue lies in software problems within Apple's iOS versions 18.0 through 18.4.x. These specific iOS versions contain bugs that negatively affect the voice quality during calls made via Bluetooth connection in Audi vehicles. Fortunately, Apple has addressed these issues, and improvements have been implemented starting with iOS 18.5.

Repair Procedure Summary

Unlike many technical service bulletins that require vehicle repairs, TSB 2078728/1 states that no repairs are necessary on the vehicle itself. The solution is entirely software-based and external to your Audi. The recommended procedure is to check the iOS version on the customer's iPhone and advise them to update their device to iOS version 18.5 or newer.

Important Warnings

Audi Technical Service Bulletin 2078728/1 includes critical information for both technicians and vehicle owners regarding this issue:

• "Replacing parts or attempting repairs will not fix the problem."
• "Unjustified work/replacement parts will be charged back."
• "Invoicing under warranty is not permitted."

This means that attempting to replace vehicle components or perform other repairs on your Audi will not resolve the poor Bluetooth voice quality issue and will result in unnecessary costs, as the problem originates from the iPhone's software.

Owner Action

If you own a 2016-2026 Audi and are experiencing poor Bluetooth voice quality during calls with your iPhone, the recommended action is straightforward:

1. Check your iPhone's iOS version: Go to Settings > General > About > iOS Version on your iPhone.
2. Update your iPhone: If your iPhone is running iOS 18.0.x through 18.4.x, update it to iOS 18.5 or a newer version. You can usually do this by going to Settings > General > Software Update.

No visit to an Audi dealership is required for this specific issue, as the solution is an update to your personal device.

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Source: NHTSA ID: 10255146