2021-2022 Audi Models Radio Static with Rear Heater On

Symptoms

Owners of 2021-2022 Audi models, including the Audi e-tron, may notice radio static when the rear window heater is active. The primary symptoms include:

• "Static is audible on FM or AM channels while the rear window heater is activated."
• All radio channels are affected by the static.
• The static disappears as soon as the rear window heater is deactivated.

Diagnosis and Trigger Conditions

The technical background for this issue points to micro-cracks in the heating or antenna wires printed on the rear window. These cracks can cause electromagnetic interference that affects the radio antenna boosters.

Damage to these wires often results from external factors, such as objects with sharp edges (like umbrellas or large containers) stored on the hat shelf or in the trunk that contact and scrape against the rear window. The application of window tint can also lead to damage to these wires.

To diagnose the issue, technicians must first verify that the radio static only occurs when the rear window heater is active. If the static is present even when the heater is off, this Technical Service Bulletin (TSB) does not apply.

Repair Procedure Summary

If the radio static is confirmed to be related to the rear window heater, the repair involves a two-step process:

1. Inspect the Rear Window: The rear window must be carefully inspected for any damage or scratches that could indicate outside influence. Figure 1 in the TSB shows an example of a scratched rear window visible to the naked eye. This inspection helps determine the cause of the micro-cracks.
2. Replace the Rear Window: If damage or micro-cracks are found, the entire rear window must be replaced. This ensures that the compromised heating and antenna wires are fully renewed, resolving the electromagnetic interference.

Required Tools or Parts

For this repair, technicians should consult ETKA (Audi's electronic parts catalog) for the latest information on necessary parts and fasteners. Specific items include:

• Fasteners, bolts, nuts, and screws as needed per the repair manual.
• The heated rear window itself.

Warranty Information

This repair may be covered under Audi's New Vehicle Limited Warranty, specifically for vehicles up to 48 months or 50,000 miles. If the vehicle is outside this warranty period, the TSB serves as informational guidance only.

Important Warning for Owners: If the inspection reveals that the damage to the rear window was caused by outside influence (e.g., scratches from objects), the repair may not be billable under warranty. In such cases, the customer will be informed that the damage is due to external factors and the repair costs cannot be covered by warranty before any parts are replaced.

Warranty claims are processed using the following codes:

• Service Number: 6489
• Damage Code: 0040
• Labor Operations:
  • Inspect rear window for damage: 6486 9999 (5 TU)
  • Heated rear window replacement: 6486 5500 (refer to SRT for associated operations)
• Claim Comment: As per TSB #2062713/1

What Owners Should Know

If you own a 2021-2022 Audi model and experience radio static only when your rear window heater is active, it's advisable to have your vehicle inspected by an authorized Audi service center. Be aware that if the damage is determined to be from external causes, the repair for your Audi e-tron radio static may not be covered by warranty.

Source: NHTSA ID 10189653