2021-2022 Audi Q8 Starter-Alternator Emissions Service Action 27BQ

Audi has launched Emissions Service Action 27BQ to address a potential issue with the starter-alternator in certain 2021-2022 Audi Q8 and other models. This service action aims to correct a condition where a defective starter-alternator may hinder the vehicle's start/stop functionality and contribute to increased CO2 and other emissions when the vehicle is stopped. While emissions remain within certified standards, Audi is taking proactive steps to ensure optimal vehicle performance and environmental compliance.

This emissions service action ensures that any necessary repairs, including the replacement of the 2021-2022 Audi Q8 starter-alternator, are performed by authorized Audi dealers free of charge to the owner. Owners of affected vehicles will be notified in waves, with the repair process taking approximately half a day.

Why This Matters: Starter-Alternator Functionality and Emissions

The starter-alternator is a crucial component in modern Audi vehicles, particularly those equipped with start/stop technology. This system automatically shuts off the engine when the vehicle is stationary (e.g., at a red light) and restarts it seamlessly when the driver intends to move. This functionality is designed to reduce fuel consumption and emissions, especially in urban driving conditions.

A defective starter-alternator can directly impact this system, leading to a noticeable inhibition of start/stop functionality. This means the engine might not shut off as expected, or it might not restart smoothly. While the document notes that emissions still remain within certification standards, the issue could lead to an increase in CO2 and other emissions when the vehicle is stopped, which is contrary to the intended design and environmental goals of the start/stop system.

Symptoms of a Defective Starter-Alternator

Owners of affected vehicles, including the 2021-2022 Audi Q8, might primarily notice issues related to the vehicle's start/stop system. The most common symptom of a defective starter-alternator is an inhibited start/stop functionality. This means the engine may not automatically shut off when the vehicle comes to a stop, or it may not restart as smoothly or quickly as it should when the driver releases the brake pedal or presses the accelerator.

While the primary concern is the impact on start/stop operation and emissions, any malfunction of this critical component could potentially lead to other related issues over time. If you experience any unusual behavior with your vehicle's start/stop system, it is advisable to have it inspected by an authorized Audi dealer.

Emissions Service Action 27BQ Details

Audi's Emissions Service Action 27BQ involves the inspection and potential replacement of the starter-alternator in affected vehicles. This repair will be carried out at no cost to the owners. The work is estimated to take approximately half a day, though dealers may require additional time for preparation and to accommodate their workshop schedule.

The service action is being rolled out in multiple waves, with specific visibility and customer mailing dates. For instance, Wave 1 had a visibility/launch date of April 30, 2024, with customer mailing in May 2024. Subsequent waves followed, with the latest update on November 15, 2024, reflecting the addition of the next wave of vehicles and updated owner notification letters.

Diagnosis and Repair Procedure

The repair process for Emissions Service Action 27BQ involves several key steps performed by an authorized Audi technician.

Checking Campaign Status

Before any work begins, technicians must check the vehicle's campaign status using the VIN in the ELSA system. This ensures that the 27BQ campaign is open for the specific vehicle and that no prior repair has been completed. If a Campaign Completion label is already present, no further work is required. Technicians are instructed to perform all available campaigns in order of their start date, prioritizing the oldest first.

Starter/Generator Software Check

A critical diagnostic step involves checking the starter/generator software version. Technicians use a diagnostic tool (GFF) to scan the vehicle and identify the software level of the starter/generator control module (DA 00CC). If the software level is found to be less than 0562, the starter-alternator requires replacement. For example, a starter/generator with software level 0523 would necessitate replacement. If the software level is 0562 or greater, the starter/generator does not require replacement, and the technician proceeds to other completion steps.

Replacement Steps

If replacement is required, the technician will follow detailed instructions from the ELSA repair manual, specifically under the section: "Electrical System > Electrical Equipment > 27 Battery, Starter, Generator, Cruise Control > Generator > Generator, Removing and Installing." This procedure involves carefully removing the existing starter-alternator, which is noted as a heavy component requiring proper support, and installing a new one. The original studs used for mounting are replaced with new bolts during this process.

Labor Operations

Various labor operations are associated with this service action, depending on whether a replacement is needed and the specific vehicle criteria. These include:

• 0150 00 10: GFF/Guided functions (setup + battery charger)
• 0150 00 60: GFF/Guided functions (GFF Operations – including SW version check)
• 2726 19 43 / 2726 19 23 / 2726 19 45: Integrated starter-alternator remove+reinstall
• 2726 55 73: Integrated starter-alternator replace
• 2706 89 50: Battery charge

Required Parts and Special Tools

To perform the Emissions Service Action 27BQ, Audi technicians utilize specific parts and specialized tools.

Key Parts for Starter-Alternator Replacement

The main component is the starter-alternator itself, with different part numbers depending on the specific vehicle criteria (e.g., SC, C8, RQ, RS, S8 models). Other essential parts include gaskets, seal rings, and bolts.

• Alternator:
  • 4N0-903-028-S
  • 4N1-903-028
  • 4N1-903-028-B
  • 4N1903028B
  • 4N0903028S
• Gaskets:
  • 06M-121-488-A
  • 06M-133-237-A
• Seal Rings:
  • 4M0-145-117
  • N-910-191-01
  • WHT-008-729-A
  • N-900-970-01
• Bolts:
  • N-910-968-01
  • N-910-718-01
  • N 91096801
  • N 91071801
• Coolant: Approximately 3 liters of coolant are needed for the repair. Various types are specified for US and Canadian dealers, including concentrate and pre-mix options:
  • G-12E-100-1G CON (US Dealers)
  • G-12E-100-2G CON (Canadian Dealers)
  • G-12E-050-1G-RTU (US Dealers)
  • G-12E-050-2G-RTU (Canadian Dealers)
  • G 12E100S1 (Concentrate)
  • G 12E050S0 (Pre-mix)

Special Tools Required

Technicians will use a range of specialized tools to safely and effectively perform the repair:

• Diagnostic Tester: VAS6150X/6160X (or equivalent)
• Battery Tester/Charger: Capable of minimum 90 Amp continuous supply
• Cooling System Tester - Adapter: VAG1274/8, VAG1274/10
• Cooling System Charge Kit: VAS6096 (or equivalent)
• Hose Clip Pliers: VAS6362, VAS6340 (or equivalent)
• Belt Tensioner Locking Tool: T40098 (or equivalent)
• Socket - SW5 12 Points: VAS262023 (or equivalent)
• Torx Socket – T60: T40087 (or equivalent)
• Safety Equipment: Safety Gloves and Safety Goggles

Important Warnings and Owner Information

Owners of affected Audi vehicles, including the 2021-2022 Audi Q8, should be aware of several important points regarding this service action:

• Inventory Vehicles: Dealers are mandated to complete this campaign on every affected inventory vehicle before it is delivered to consumers.
• California Owners: If you reside in California, state regulations require this campaign to be completed before your vehicle's registration renewal. You must obtain a signed "Vehicle Emission Recall - Proof of Correction" certificate (RC EMISCAVWAU) from your dealer after the campaign is completed. This certificate should be retained for your records and mailed to the California DMV only upon request.
• Lessor Responsibility: If you are a lessor and the registered owner of an affected vehicle, you must forward the service action letter to the lessee via first-class mail within ten (10) days of receipt.
• Dealer Issues: If your authorized Audi dealer fails or is unable to complete this work free of charge within a reasonable time, or if you have any questions, contact Audi Customer Experience at 1-800-253-2834 (US) or 1-800-822-2834 (Canada), or visit www.audiusa.com / www.audi.ca.
• Campaign Completion Label: A Campaign Completion Label (part number CAMP 010 000) will be affixed next to the vehicle emission control information label upon completion of the service action.
• Repair Responsibility: Damages resulting from improper repair or failure to follow the work instructions are the dealer's responsibility and are not eligible for reimbursement under this action.
• Pre-existing Conditions: Diagnosis and repair of pre-existing conditions in the vehicle are not covered under this action.
• Temperature Considerations: When working during extreme temperatures, it is recommended that the vehicle be allowed to acclimate inside the shop to avoid temperature-related component damage or breakage.

What Owners Should Do

If you own an affected 2021-2022 Audi Q8 or another model covered by Emissions Service Action 27BQ, it is recommended to contact your authorized Audi dealer as soon as possible to schedule the necessary work. The repair will be performed at no cost to you. You can find a dealer and schedule service by visiting www.audiusa.com.

Remember to retain any documentation provided by the dealer, especially the "Proof of Correction" certificate if you are a California resident, as it may be required for vehicle registration renewal. This proactive service action ensures your vehicle continues to meet and exceed performance and emissions expectations.

NHTSA ID: 11011314