2021-2024 Audi Starter-Alternator Service Action 27BQ Update

Audi has issued a revision to Emissions Service Action 27BQ, an important manufacturer communication concerning the starter-alternator in various 2021-2024 Audi models. This service action aims to replace the starter-alternator in affected vehicles at no cost to owners. The latest revision, identified as 27BQ_REV20250107 and dated January 07, 2025, provides a critical update to the work instructions for technicians performing this repair.

The Audi starter-alternator Service Action 27BQ addresses potential issues with this component, which plays a crucial role in the vehicle's start/stop functionality and overall emissions performance. While a defective starter-alternator might inhibit the start/stop feature, potentially leading to increased CO2 and other emissions when the vehicle is stopped, Audi confirms that emissions still remain within certification standards.

Why This Revision Matters

Emissions Service Action 27BQ involves the replacement of the starter-alternator. The recent revision specifically updates the work instructions found in Section C of the repair procedure. This update clarifies how technicians should handle a particular situation that may arise during the replacement process, ensuring the integrity and longevity of the repair.

Revision Details: The Stud <18> Update

The key update in this revision focuses on the proper handling of a specific component, referred to as "stud <18>". The revised instruction states: "If the threads on stud <18> are damaged, the stud will not be reused and will be replaced with a bolt." This is a vital clarification for technicians.

Damaged threads on a stud can compromise the secure mounting of the starter-alternator, potentially leading to improper torque, loosening over time, or even component failure. By mandating replacement with a new bolt if damage is detected, Audi ensures that the starter-alternator is always securely fastened, maintaining the reliability and safety of the repair. This detail is crucial for technicians performing the Audi starter-alternator Service Action 27BQ.

Important Warnings for Dealers

Audi has issued specific instructions to its dealer personnel regarding this revision. Dealers are advised to ensure that everyone with campaign-related responsibilities thoroughly reviews the revised circular. This information has been published to ELSA and Service References in Elsa2Go, Audi's internal technical information systems.

Furthermore, dealers are instructed to discard any paper copies of previous versions of the circular and ensure they are replaced with the most current version. This strict adherence to updated procedures, such as those detailed in 27BQ_REV20250107, is paramount for ensuring correct repairs, consistent service quality, and ultimately, customer satisfaction.

Owner Action

If you own a 2021-2024 Audi model that is covered by Emissions Service Action 27BQ, your authorized Audi dealer will replace the starter-alternator at no cost. This is a proactive measure by Audi to ensure proper vehicle function and emissions compliance. While this specific bulletin is a technical update for dealers, it is part of the broader Audi starter-alternator Service Action 27BQ that affects your vehicle. You should contact your authorized Audi dealer to schedule the service if you have not already had this action performed.

Source: NHTSA ID 11013707