2021-2023 Audi 2.0 TFSI Whistling Turbocharger Noise TSB

Symptoms

Owners of affected Audi models may experience a distinct whistling noise from the turbocharger. This Audi 2.0 TFSI whistling noise typically occurs under specific driving conditions. The noise is usually heard when accelerating or maintaining a constant speed, particularly when the engine is operating in combustion mode.

Technicians have identified that the whistling noise is most noticeable between 1500 and 2200 RPM and at approximately 70% engine load. The presence of this noise does not depend on the selected transmission position. Workshop findings indicate that the noise has a frequency ranging from 2.8 kHz to 3.2 kHz, which can be precisely measured using a PICO NVH tool.

Important Warnings

Audi has issued a critical warning regarding the repair of this whistling noise:

NOTICE Replacing the turbocharger with one with an identical part number (part number 06N.145.702.D) will not fix the problem. Check ETKA for an alternative available part number.

This means that simply replacing the faulty turbocharger with another unit bearing the original part number 06N.145.702.D will not resolve the Audi 2.0 TFSI whistling noise. Owners and technicians must ensure that an updated or alternative part number is sourced through the ETKA parts catalog to ensure a successful repair.

Diagnosis

To accurately diagnose the Audi 2.0 TFSI whistling noise, technicians are advised to use the VAS tool 611015, also known as the PICO NVH tool. This specialized equipment helps identify the noise and its specific characteristics, such as frequency.

For comprehensive noise analysis and billing procedures related to the VAS 611015 tool, technicians should also refer to TSB 2070568, titled "Engine/Gearbox: professional noise analysis with PICO-NVH tool." This additional bulletin provides detailed information on the configuration, measurement positions, and analysis techniques necessary for an effective diagnosis.

Repair Procedure Summary

The primary solution for the Audi 2.0 TFSI whistling noise involves replacing the turbocharger. However, as highlighted in the important warning, it is crucial not to replace the faulty turbocharger with another unit that has the identical part number 06N.145.702.D. This specific part number has been identified as the source of the audible whistling noise in rare cases.

Technicians must consult the ETKA parts catalog to identify and order an alternative, updated turbocharger part number. The repair process will involve removing the existing turbocharger and installing the new, updated unit. Following the replacement, a road test is recommended to confirm that the whistling noise has been eliminated.

Required Tools or Parts

To perform the diagnosis and repair outlined in TSB 2071243/1, specific tools and parts are necessary:

• VAS 611015 (PICO NVH tool): Essential for accurate noise, vibration, and harshness (NVH) measurement and analysis.
• Turbocharger: An updated turbocharger unit, which must be sourced by checking the ETKA parts catalog for an alternative to part number 06N.145.702.D.
• Fasteners, Bolts, Nuts, and Screws: As needed for the repair, these should also be referenced in ETKA or the repair manual.

Warranty Information

This Technical Service Bulletin 2071243/1 outlines the warranty coverage for the repair of the Audi 2.0 TFSI whistling noise. The claim type is generally covered for up to 48 months or 50,000 miles, whichever comes first. For Certified Pre-Owned (CPO) vehicles, the G10 claim type applies, and ownership verification is required.

If the vehicle falls outside of these warranty parameters, the information provided in this TSB is for informational purposes only. All warranty claims must adhere to the Audi Warranty Policies and Procedures Manual and are subject to review by Audi Warranty.

Owner Action

If you own a 2021-2023 Audi A4, A5, or Q5 with the 2.0 TFSI engine and are experiencing a whistling noise from the turbocharger, it is recommended to schedule an appointment with an authorized Audi service center. Inform them about the Audi 2.0 TFSI whistling noise and mention Technical Service Bulletin 2071243/1. The technicians will use specialized tools like the VAS 611015 to diagnose the issue and replace the turbocharger with an updated part, ensuring the problem is resolved correctly.

---

Source: NHTSA ID: 10249578