2019-2026 Audi CarPlay Connection Drops TSB

Audi has released Technical Service Bulletin 91 24 99 2073629/1 to address customer complaints regarding Apple CarPlay connection drops in various 2019-2026 Audi models equipped with the Audi Smartphone Interface (ASI). This bulletin, dated April 8, 2024, clarifies that the intermittent disconnection issue is related to the iPhone's operating system, specifically iOS version 17.3.1 and potentially other versions, rather than a fault with the vehicle's infotainment system. Owners experiencing that their Audi e-tron CarPlay disconnects or other Audi models face similar issues should be aware that this is an external software problem.

Symptoms of Apple CarPlay Disconnection

Owners typically report that shortly after initiating Apple CarPlay on the Multi Media Interface (MMI), the connection between their iPhone and the vehicle is lost. The phone usually reconnects within a few seconds, only for Apple CarPlay to disconnect again after a brief period. This can lead to a frustrating cycle of repeated disconnections, making it difficult to use CarPlay features reliably.

Understanding the "Reconnect-Loop" Cause

The technical background provided in TSB 91 24 99 2073629/1 explains that the problem arises when an iPhone is initially paired wirelessly, but then a wired connection (e.g., for USB charging) is used after the vehicle has entered a sleep cycle. In this scenario, the iPhone's operating system struggles to determine whether to use the wired or wireless connection. This confusion triggers what Audi describes as a “reconnect-loop” initiated by the phone, causing the persistent connection drops. While specifically noted for iOS version 17.3.1, the bulletin indicates that both newer and older iOS versions might also be affected by this bug. This confirms that the frequent instances where an Audi e-tron CarPlay disconnects are rooted in the phone's software, not the car's.

Important Warnings for Owners

Audi explicitly states that no repair is available for this condition at this time.

• Do not perform any repairs: Audi advises against attempting any repairs for this concern, as such repairs may be denied warranty coverage.
• Not a vehicle defect: Owners should be informed that this condition stems from an outside, third-party influence (the iPhone's iOS) and therefore cannot be repaired by Audi.
• No warranty coverage: This issue is considered a third-party system concern and is not covered under any Audi Warranty.

Workarounds for Apple CarPlay Connection Drops

While a permanent fix from Audi is not available, the TSB provides several workarounds to help manage the Apple CarPlay disconnection problem:

1. Reset Pairings: Delete all existing Bluetooth, Wi-Fi, and Audi Smartphone Interface (ASI) pairings between your iPhone and the vehicle, both from the MMI system and your phone's settings.
2. Choose One Connection Type: You will need to decide whether to use wireless Apple CarPlay or wired Apple CarPlay.
   • For Wireless CarPlay: If you opt for wireless CarPlay, avoid using a USB cable to charge your phone simultaneously. Wireless charging via the Audi PhoneBox (if equipped) is an acceptable alternative.
   • For Wired CarPlay: If you prefer wired CarPlay, ensure your phone is not also paired via Bluetooth or Wi-Fi to the vehicle.

What Owners Should Know

Audi recommends that owners consistently update their iPhones to the newest iOS version available and keep the device well-maintained. The manufacturer anticipates updating TSB 2073629/1 when more information becomes available, such as a specific iOS update that resolves this issue. If your Audi e-tron CarPlay disconnects, keeping your phone's software up-to-date is the best proactive measure.

Source: NHTSA ID 10253289