2019-2024 Audi Starter-Alternator Emissions Service Action 27BQ

Why This Emissions Service Action Matters

Audi has identified that a defective starter-alternator in certain 2019-2024 models may prevent the vehicle's start/stop system from functioning correctly. This can lead to increased CO2 and other emissions while the vehicle is stopped, although emissions are expected to remain within certification standards. This Emissions Service Action 27BQ is a proactive measure to ensure your Audi vehicle continues to meet environmental standards and maintain optimal performance.

What's Being Addressed

This service action, identified as Audi Emissions Service Action 27BQ, focuses on the starter-alternator component. Authorized Audi dealers will replace the starter-alternator in affected vehicles at no charge to owners. The repair is designed to restore proper start/stop functionality and ensure the vehicle's emissions performance.

Important Warnings for Owners

Owners should be aware of several critical points regarding this service action:

• California Owners: California regulations mandate that this campaign must be completed prior to your vehicle registration renewal. After the work is done, you will receive a signed "Vehicle Emission Recall - Proof of Correction" certificate (RC EMISCAVWAU) from your dealer. You must retain this certificate for your records. "DO NOT MAIL THIS FORM to the DMV, unless requested." The certificate should only be mailed to the California DMV upon request.
• Dealer Inventory: Dealers must ensure that every affected inventory vehicle has this campaign completed before delivery to consumers.
• Battery Charger Use: During the repair process, a battery charger must be connected. It is crucial "DO NOT change any settings that will damage the charger or the vehicle." Also, "If the ignition is left on with an insufficient charging voltage, damage to 48V battery may occur."
• No Unnecessary Replacement: The starter/generator "does not require replacement" if its software level is 0562 or greater. Technicians will check this first.
• Heavy Component: The starter/generator is a heavy component and must be properly supported during removal and installation to prevent injury or damage.
• Parts Reusability: The original studs used for the starter-alternator will not be reused and will be replaced with new bolts during the repair.
• Warranty: "Damages resulting from improper repair or failure to follow these work instructions are the dealer's responsibility and are not eligible for reimbursement under this action." Additionally, "Diagnosis and repair of pre-existing conditions in the vehicle are not covered under this action."

Repair Procedure Summary for Audi Starter-Alternator 27BQ

The repair for the Audi starter-alternator 27BQ involves a multi-step process performed by authorized Audi technicians.

1. Initial Check and Software Version Verification

First, technicians will check the vehicle's service history in Elsa to confirm if the Emissions Service Action 27BQ has already been completed. If a Campaign Completion label is present, no further work is required. If not, the process continues.

Next, the technician will connect a specialized battery charger, such as the VAS5908KIT, to the vehicle. It is critical that the charger is set to a charging voltage of 14.8 Volts, and the voltage displayed in ODIS (Offboard Diagnostic Information System) is confirmed to be over 14V. The vehicle will then be scanned using Guided Fault Finding (GFF) to access the starter/generator control module (00CC). The software level of the starter/generator will be checked. If the software version is found to be less than 0562, the starter-alternator requires replacement. If the software level is 0562 or greater, replacement is not necessary, and the service action is complete after the software check. For example, a starter/generator with software level 0523 would require replacement.

2. Starter-Alternator Replacement (If Required)

If replacement is necessary, the technician will proceed with removing and installing the new starter-alternator. This is a complex procedure that requires supporting the heavy component to prevent damage or injury. The repair follows detailed instructions in the ELSA repair manual under "Electrical System > Electrical Equipment > 27 Battery, Starter, Generator, Cruise Control > Generator > Generator, Removing and Installing." During the replacement, certain components like studs (part number N-910-718-01) will not be reused and will be replaced with new bolts. After the physical replacement, the technician will perform a specific starter/generator replacement test plan within ODIS, following all on-screen prompts, specifically "DA 00CC > Guided functions > Replace control module."

3. Campaign Completion

Upon successful completion of the repair, the technician will stamp the repair order and affix a Campaign Completion Label (part number CAMP 010 000) next to the vehicle's emission control information label. This label serves as proof that the Emissions Service Action 27BQ has been performed.

Required Tools and Parts

Performing the Audi starter-alternator 27BQ service action requires specific tools and parts to ensure a correct and safe repair:

Required Tools:

• Battery Charger (Max. 105Amp): VAS5908KIT
• Diagnostic Tester: VAS6150X/6160X (or equivalent)
• 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 Gloves and Safety Goggles

Required Parts (based on vehicle criteria):

• Alternator:
  • 4N0-903-028-S (for SC, 24, 34, 44, 54 criteria)
  • 4N1-903-028 (for C8, A8, 4M, S8, 21, 22, 23, 25, 31, 32, 33, 35, 41, 42, 43, 45, 51, 52, 53, 55 criteria)
  • 4N1-903-028-B (for RQ, RS, 26, 27, 36, 37, 46, 47, 56, 57 criteria)
• Gasket:
  • 06M-121-488-A (for C8, A8, 4M, SC, 21, 22, 23, 24, 31, 32, 33, 34, 41, 42, 43, 44, 51, 52, 53, 54 criteria)
  • 06M-133-237-A (for C8, 21, 31, 41, 51 criteria)
• Seal Ring:
  • 4M0-145-117 (for 4M, 23, 33, 43, 53 criteria)
  • N-910-191-01 (for RS, 26, 36, 46, 56 criteria)
  • WHT-008-729-A (for S8, RQ, 25, 27, 35, 37, 45, 47, 55, 57 criteria)
  • N-900-970-01 (for ALL criteria)
  • N-91019101
• Bolt:
  • N-900-970-01 (Washer, for ALL criteria)
  • N-910-718-01 (if necessary, for ALL criteria)
  • N-910-968-01 (for S8, RQ, 25, 27, 35, 37, 45, 47, 55, 57 criteria)
  • N-91096801 (Hexagon Socket Oval Head Bolt (COMBI))
• Coolant (as needed):
  • G-12E-100-1G CON (Concentrate, US Dealers)
  • G-12E-100-2G CON (Concentrate, Canadian Dealers)
  • G-12E-050-1G-RTU (50/50 Pre-mix, US Dealers)
  • G-12E-050-2G-RTU (50/50 Pre-mix, Canadian Dealers)
  • G 12E100S1 (Concentrate, USA/Canada Only)
  • G 12E050S0 (Pre-mix, USA Only)
• Screw, Hex. HD.: N-91071801 (if necessary)

Claim Entry Instructions

For dealers, the Emissions Service Action 27BQ has specific claim entry instructions:

• Service Number: 27BQ
• Damage Code: 0099
• Parts Vendor Code: 002
• Claim Type: Sold vehicle: 710, Unsold vehicle: 790
• Causal Indicator: Mark labor as causal if Alternator (starter/generator) is OK. Mark Alternator* as causal if Alternator (starter/generator) is NOT OK.
• Vehicle Wash/Loaner: "Do not claim wash/loaner under this action."
• Labor Operations (Labor Op) and Time Units:
  • 0150 00 10: SEE ELSA (GFF/Guided functions (setup + battery charger))
  • 0150 00 60: Time stated on diagnostic protocol (GFF/Guided functions)
  • 2726 19 43: SEE ELSA (Integr. starter-alternator remove+reinstall)
  • 2706 89 50: SEE ELSA (Battery charge)
  • 2726 55 73: SEE ELSA (Integr. starter-alternator replace)

Owner Action

If you own a 2019-2024 Audi model affected by Emissions Service Action 27BQ, you should contact your authorized Audi dealer as soon as possible to schedule the necessary work. The repair will be performed free of charge and is expected to take approximately half a day. However, dealers may require additional time for preparation and to accommodate their workshop schedule.

For California owners, it is crucial to complete this campaign before your vehicle's registration renewal. You will receive a "Vehicle Emission Recall - Proof of Correction" certificate (RC EMISCAVWAU) from your dealer after the repair; keep this document for your records.

If you have any questions or concerns, or if your dealer is unable to complete the work free of charge within a reasonable timeframe, you can contact Audi Customer Experience at 1-800-253-2834 (USA) or 1-800-822-2834 (Canada). You can also visit www.audiusa.com or www.audi.ca to find a dealer or check your vehicle's eligibility using your VIN.

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NHTSA ID: 11012542