2021-2023 Audi e-tron Rear Axle Rumbling/Rattling Noises

Symptoms

Owners of 2021-2023 Audi e-tron and e-tron Sportback models may notice rumbling/rattling noises from the rear axle area when driving over irregularities in the road. This issue, described as Audi e-tron rumbling rattling noises, is particularly noticeable in cold weather conditions.

Workshop findings indicate that these noises are reproducible at speeds between 5 and 30 mph when outside temperatures are below 32°F. The sounds originate from the rear shock absorbers and their mountings.

Technical Background

The root cause of the Audi e-tron rumbling rattling noises is attributed to frozen water or dirt accumulating above the shock absorber mountings. When temperatures drop below 32°F, this frozen debris restricts the normal operation of the shock absorber mounting, leading to the audible rumbling or rattling.

To verify if this is the cause of the concern, technicians can carefully heat up the shock absorber mounting and then reevaluate the vehicle for the noise.

Repair Procedure Summary

To resolve the Audi e-tron rumbling rattling noises, Audi Technical Service Bulletin 2064019/3 outlines a specific repair process. This involves addressing both rear shock absorber mountings.

First, both rear shock absorbers must be removed from the vehicle. This procedure follows the guidelines detailed in the Elsa Repair Manual, specifically under Chassis >> Suspension, Steering, Wheels >> 42 Rear Suspension >> Suspension Strut, Shock Absorber, Spring.

Next, the shock absorber mountings on both sides of the vehicle are replaced. After installing the new mountings, approximately 10 inches of butyl sealing cord are applied to each side. This cord creates a seal between the protective cap (item 4 in Figure 1 of the TSB) and the new shock absorber mounting (item 6 in Figure 1).

Before applying the butyl sealing cord, it is crucial to ensure that the sealing surfaces of the new shock absorber mounting and the corresponding protective cap are clean and dry. The original shock absorber cap can be reused if it is in good condition.

Required Tools or Parts

For this repair, specific parts are needed to address the Audi e-tron rumbling rattling noises:

• Shock absorber mounting: Quantity 02. Technicians should consult ETKA for the correct part number.
• Butyl Sealing Cord: Part number AKD49701004R10. Approximately 0.1 units are required.
• Fasteners, Bolts, Nuts, and Screws: As needed, per the repair manual. Technicians should check ETKA/ELSA for specific requirements.

Always confirm the latest information and part bulletins with your Parts Department and/or ETKA before beginning any repair.

Warranty Information

This repair for the Audi e-tron rumbling rattling noises is covered under Audi's warranty for up to 48 months or 50,000 miles, whichever comes first. If the vehicle is outside this warranty period, the Technical Service Bulletin serves as informational guidance.

When submitting a warranty claim, the following codes apply:

• Claim Type: 110
• Service Number: 4295
• Damage Code: 0020

Labor operations include replacing and sealing the shock absorber mountings, diagnostic time (GFF 0150 0000), and road tests before (0121 0002) and after (0121 0004) the service procedure. All warranty claims must adhere to the Audi Warranty Policies and Procedures Manual and are subject to review or audit by Audi Warranty.

Source: NHTSA ID 10233509