2021-2026 Audi Cracking Noise from Drive Axle TSB

Audi has released Technical Service Bulletin (TSB) 2061464/10 to address a specific concern reported by vehicle owners: a cracking noise emanating from the front or rear of the vehicle. This noise is most noticeable when the vehicle changes direction. This TSB provides a detailed diagnostic and repair procedure for technicians to resolve the issue.

Symptoms of Cracking Noise

Owners may experience a distinct cracking noise, particularly when making turns or maneuvering their vehicle. The key symptoms include:

• A cracking noise heard from either the front or rear end of the vehicle.
• The noise occurs specifically when changing the vehicle's direction.
• On quattro models, this Audi e-tron cracking noise or similar can also be heard when driving away from a standstill, especially after a change in direction.
• The sound typically originates from the left or right side of the vehicle.

Diagnosis and Trigger Conditions

Audi's technical background for this issue points to the relative movement of the stub axle of the drive shaft within the wheel bearing as the root cause. For quattro vehicles, the noise is sometimes attributed to the prop shaft in isolated cases. Technicians will investigate these areas to confirm the source of the cracking noise.

Repair Procedure Summary

The repair outlined in TSB 2061464/10 involves a precise procedure to secure the drive axle. Technicians are instructed to follow the ELSA (Electronic Service Information System) repair manual for the drive axle's disassembly and assembly. The core steps include:

1. Preparation: Accessing the drive shaft and wheel bearing components.
2. Locking Fluid Application: Bonding the stub axle of the drive shaft into the wheel bearing using a specialized locking fluid (part number D 154100A1).
3. Precise Application: Approximately 5 ml of locking fluid is required for each drive shaft. It must be applied in two continuous beads: one where the splines begin and another at the center of the splines.
4. Reassembly: Reinstalling the drive axle according to ELSA instructions.
5. Curing Time: After assembly, it is critical that the vehicle is not operated for 8 hours to allow the locking fluid to properly cure and bond the components.

Depending on the specific repair, additional labor operations may be necessary, such as removing and installing wheels, noise insulation, detaching and re-attaching suspension links, and potentially adjusting headlights or calibrating the front camera.

Required Tools and Parts

To perform this repair, specific materials are required:

• Locking Fluid: Part number D 154100A1. The TSB specifies 0.2 units, likely referring to a quantity sufficient for the required 5 ml per application.
• Fasteners: Any necessary bolts, nuts, and screws should be sourced according to the ETKA/ELSA repair manual.

Owner Action

If you own an affected Audi model from 2021-2026 and are experiencing a cracking noise when changing direction, particularly an Audi e-tron cracking noise, it is recommended to contact an authorized Audi service center. Explain the symptoms you are experiencing. Since this is a Technical Service Bulletin, Audi dealerships are aware of the issue and have a prescribed repair procedure.

Warranty coverage for this repair will depend on your vehicle's specific warranty status. It is advisable to discuss this with your service advisor when scheduling an appointment.

NHTSA ID: 11025243