2012-2024 Audi Washer Solvent Level Warning TSB

Owners of various 2012-2024 Audi models may encounter a persistent "washer solvent level warning is on" message in their driver information system (DIS), despite the windshield washer fluid reservoir being full. This issue, detailed in Audi Technical Service Bulletin (TSB) 2038151/14, points to a problem with the washer solvent level sensor (G33) rather than an actual low fluid level. The TSB provides a clear diagnostic and repair procedure to address this common concern.

Symptoms

If your Audi is affected by this issue, you will typically observe the following:

• A "washer solvent level warning is on" message displayed in the driver information system (DIS).
• The windshield washer solvent level is confirmed to be correct and full.
• There is no functional restriction or problem with the operation of the windshield washer system itself.

Technical Background

The root cause of the "Audi washer solvent warning" is often related to the sensitivity of the washer solvent level sensor (G33). This sensor's operation can be negatively impacted by the type, concentration, or presence of additives in the washer solvent. An incorrect concentration or the presence of certain additives can contaminate the sensor, thereby reducing its sensitivity and causing it to incorrectly report a low fluid level.

Important Warnings

Audi emphasizes that replacing the windshield washer solvent level sensor is generally not necessary to resolve this issue. The problem typically stems from contaminated sensor probes or an incorrect washer solvent solution. Warranty claims for the replacement of washer solvent level sensors that are later found to be functional will not be reimbursed.

Repair Procedure Summary

Addressing the "Audi washer solvent warning" involves cleaning the washer solvent level sensor and ensuring the correct type and concentration of fluid are used. The general steps are as follows:

1. Empty the Reservoir: The first step is to completely empty the washer solvent reservoir.
2. Access and Clean Sensor:
   • For most Audi vehicles (excluding A3 Sedan, A3 Cabriolet, and Q4 e-tron), the level sensor should be removed. The sensor probes are then cleaned using all-purpose cleaner D 009 401 04 or isopropyl alcohol.
   • For Audi A3 Sedan, A3 Cabriolet, and Q4 e-tron models, the washer solvent level sensor is not removable. In these cases, the reservoir must be removed, followed by the filler neck, to gain access to and clean the sensor probes.
3. Thorough Cleaning: A long-stem cleaning brush, such as a hummingbird feeder cleaning brush, saturated with all-purpose cleaner D 009 401 04 or isopropyl alcohol, should be used to thoroughly clean the sensor probes.
4. Refill with Approved Solvent: The reservoir must be refilled with the correct type and concentration of washer solvent. Audi recommends fluids available from the Audi Top Service Supplies and Touch Up Paint eStore, specifically a 35% pre-mix that offers freeze protection down to -22°F (-30°C) and contains no rain repellents. For colder climates requiring freeze protection below this range, Windshield Washer Fluid Concentrate ZAW 096 311 B can be used and mixed according to specific guidelines.
5. Check Concentration: The concentration and freeze point of the refilled solvent should be checked using a T10007A refractometer to ensure optimal performance and prevent future issues with the Audi washer solvent warning.

Required Tools or Parts

To perform this service, technicians will need specific cleaning agents and washer fluid products:

• Windshield Washer Fluid Concentrate: Part number ZAW 096 311 B (item number 128429). This is available from the Audi Top Service Supplies & Touch-Up Paint eStore.
• Washer Solvent Alternative: Item #121133 / WWFDRUM, for states with VOC-restrictions, also available from the Audi Top Service Supplies & Touch-Up Paint eStore.
• All-purpose Cleaner: Part number D 009 401 04 or isopropyl alcohol.
• Refractometer: Tool number T10007A, used to check fluid concentration and freeze point.

Warranty Information

This Technical Service Bulletin outlines specific warranty claim procedures for addressing the "Audi washer solvent warning" issue:

• Claim Type: This service is covered under warranty for vehicles up to 48 months or 50,000 miles. For Certified Pre-Owned (CPO) vehicles, it falls under G10 coverage, requiring owner verification.
• Out of Warranty: If the vehicle is outside of its warranty period, this TSB serves as informational guidance only.
• Service Number: 9258
• Damage Code: 0040
• Labor Operations:
  • Fluid level sensor remove and reinstall: 9258 19XX
  • Windshield washer reservoir remove and reinstall: 9260 19XX
  • Clean fluid level sensor and adjust solvent concentration: 9258 2999 (10 Technical Units)
  • Diagnostic Time (for Q4 e-tron only): 0150 0000 (Maximum 30 Technical Units)
  • Road test prior to service procedure: No allowance
  • Road test after service procedure (for Q4 e-tron only): 0121 0004 (10 Technical Units)
• Claim Comment: All warranty claims must be submitted in accordance with TSB 2038151/14 and the Audi Warranty Policies and Procedures Manual, and are subject to review or audit by Audi Warranty.

Source: NHTSA ID: 10237017