2021-2024 Audi Drivetrain Rattling Noise TSB 2072713/1

Symptoms of Drivetrain Rattling Noise

Owners of various 2021-2024 Audi models, including the A4, A5, A6, A7, and Q5 equipped with the DL 382 Transmission, may notice a distinct rattling noise emanating from the drivetrain. This Audi drivetrain rattling noise is typically heard from the engine while the vehicle is idling and not under load, especially just before the vehicle comes to a complete stop. Service technicians have specifically observed these rattling noises when the transmission is in position P (Park). A key characteristic of this noise is that it tends to reduce significantly or disappear entirely when the gear selector is moved to position D (Drive) or R (Reverse). This specific behavior helps differentiate it from other potential drivetrain issues.

Technical Background of the Noise

Audi's Technical Service Bulletin 2072713/1 provides insight into the origin of this Audi drivetrain rattling noise. The bulletin identifies the root cause as rotational irregularities within the engine. These inherent irregularities can lead to specific noises originating from the dual-mass flywheel. The dual-mass flywheel is a crucial component designed to absorb engine vibrations and rotational fluctuations, thereby providing smoother power delivery and reducing stress on the transmission. In certain operating conditions, particularly at idle, the interaction between these engine irregularities and the dual-mass flywheel's operation can manifest as the described rattling sound. This is considered a functional characteristic rather than a defect.

Important Warning for Owners and Technicians

Audi has issued a critical advisory within TSB 2072713/1 regarding this specific drivetrain noise. The bulletin explicitly states: "Please do not repair. The noises are construction-related and normal. No damage occurs to components. Explain the background to the customer." This directive is crucial for both owners and service personnel. It means that if your vehicle exhibits this particular rattling noise, and diagnostic checks confirm it aligns with the conditions described in TSB 2072713/1, no repair is necessary. Attempting to repair what is deemed a normal operating characteristic will not resolve the sound and could lead to unnecessary costs, wasted time, or the premature replacement of functional components. Owners should be thoroughly informed that the noise is an inherent design characteristic and does not indicate a fault, impending failure, or safety concern for the drivetrain or dual-mass flywheel.

Diagnosis and Inspection

For technicians investigating a reported Audi drivetrain rattling noise, the initial diagnostic steps involve a comprehensive check of all engine components. The goal is to identify any factors that could cause irregular functioning of the ignition or injection systems. This includes looking for potential engine misfires or fluctuating idle speeds, as these conditions can exacerbate engine rotational irregularities.

A visual inspection of the dual-mass flywheel is also a key part of the diagnostic process. This inspection can be performed through a designated service opening, allowing technicians to carefully examine the flange for the drive plate and the drive plate itself for any signs of excessive lateral runout. In some cases, significant lateral runout can be detected visually without specialized measurement tools while the engine is running. Audi also directs technicians to consult video STV_0412, which is located in SSP 678 of the Audi Knowledge Tank, for detailed visual inspection guidance. Furthermore, it is essential to ensure there are no traces of grease or oil present, as these could indicate other underlying issues that require attention. If these thorough inspections reveal no irregularities beyond the normal operational characteristics, the dual-mass flywheel is considered to be functioning as intended, and the observed rattling noise is confirmed as normal.

Warranty Information

Audi Technical Service Bulletin 2072713/1 is explicitly classified as an informational bulletin. This designation has implications for warranty coverage. It means that any diagnostic work performed or explanations provided to the customer specifically related to this particular Audi drivetrain rattling noise, when confirmed to be a normal characteristic as per the TSB, are generally not covered under Audi's standard warranty. Owners should be aware that if a dealer performs extensive diagnostics or attempts repairs beyond simply confirming the conditions outlined in this TSB, those charges may not be covered by warranty. It is advisable to discuss potential costs with the service center beforehand.

Source: NHTSA ID 10249144, TSB 2072713/1