Fitment notes: AGM battery required for start-stop system; located under cargo floor in rear
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Every control module on the 2019-2026 Audi Q8 — where it lives, replacement time, and what it takes to program a replacement. Modules marked dealer / factory tool won't work after a part swap alone — budget for programming.
📍 Inside transmission housing, integrated with mechatronic unit (8-speed Tiptronic)
🔧 VAS 5054A/6154 with ODIS
⚠️ Mechatronic unit replacement requires transmission removal, fluid flush, and extensive adaptation. Component protection active; aftermarket tools have limited success even with AutoAuth.
📍 Behind center dashboard, integrated with HVAC unit above transmission tunnel
🔧 VAS 5054A/6154 with ODIS or Autel MaxiSys
⚠️ Four-zone automatic climate control standard. Dashboard removal required for access. Actuator calibration needed after installation.
All-Wheel Drive Control Module / Quattro Control (AWD)3.0 hr R&Rdealer / factory tool +0.7 hr▸ programming details
📍 Transmission tunnel, integrated with rear differential or transfer case
🔧 VAS 5054A/6154 with ODIS
⚠️ Quattro with ultra technology or sport differential. Torque distribution adaptation required. Access requires exhaust and driveline component removal.
Electric Power Steering Control Module (EPS)2.5 hr R&Rdealer / factory tool +0.7 hr▸ programming details
📍 Steering column, integrated with steering gear assembly at firewall
🔧 VAS 5054A/6154 with ODIS
⚠️ Dynamic steering with variable ratio optional. Steering angle sensor calibration mandatory after replacement. Component protection active.
MMI Navigation Plus / Radio Control Module (MMI)2.2 hr R&Rdealer / factory tool +0.8 hr▸ programming details
📍 Behind center dashboard, above transmission tunnel below HVAC controls
📍 Engine bay, left front corner near battery and fender
🔧 VAS 5054A/6154 with ODIS or Autel IM608/MaxiSys Elite
⚠️ Integrated with hydraulic unit. Bleeding procedure required after replacement. Component protection may apply depending on failure mode.
Body Control Module / Onboard Power Supply Control Module (BCM/OPSM)1.8 hr R&Rdealer / factory tool +1.0 hr▸ programming details
📍 Behind dashboard, left side near gateway module above fuse panel
🔧 VAS 5054A/6154 with ODIS
⚠️ Controls lighting, wipers, power distribution, and convenience functions. Extensive adaptation required for all body functions after replacement.
Central Gateway Control Module (CGW)1.5 hr R&Rdealer / factory tool +1.2 hr▸ programming details
📍 Behind left side of dashboard, above driver footwell fuse panel
🔧 VAS 5054A/6154 with ODIS
⚠️ Security Gateway 17+ enforces authentication for all protected modules. Replacement requires dealer programming and all module re-adaptation. Critical for diagnostic access.
📍 Center console tunnel, below center stack behind trim panel
🔧 VAS 5054A/6154 with ODIS or Autel MaxiSys Elite
⚠️ Crash data must be cleared after deployment. Component protection active; seat occupancy sensors and all airbag circuits require adaptation after replacement.
Tailgate Control Module / Power Liftgate Module (TGM)1.0 hr R&Raftermarket tool +0.3 hr▸ programming details
📍 Tailgate, left side behind interior trim panel
🔧 VAS 5054A/6154 with ODIS or Autel MaxiSys
⚠️ Power tailgate with kick-sensor standard. Height memory and pinch protection calibration required after replacement.
📍 Front bumper, center behind lower grille opening
🔧 VAS 5054A/6154 with ODIS
⚠️ 77 GHz radar for adaptive cruise and pre-sense. Requires precise alignment and calibration after replacement or bumper repair. Component protection active.
📍 Engine bay, on or near battery in left front corner
🔧 VAS 5054A/6154 with ODIS
⚠️ Monitors 12V battery state of charge and health. Battery registration required after replacement to prevent overcharging. Component protection active.
⚠️ HD Matrix LED or LED headlights. Each side has separate module. Headlight range adaptation and AFS calibration required. Component protection on Matrix LED systems.
📍 Under each front seat, inboard side near seat track
🔧 VAS 5054A/6154 with ODIS or Autel MaxiSys
⚠️ Controls power seat, memory, heating, ventilation, and massage. Memory positions stored in module; may require re-programming after replacement.
Aftermarket tool coverage varies by software version and vehicle build — treat "aftermarket tool" rows as "usually possible" and verify against your tool maker's coverage list before promising a customer. Spot a wrong location or hour? Tell us — corrections ship fast here.
BACK OVER PREVENTION: SENSING SYSTEM: CAMERA · 25V900000
2025-12-19
Volkswagen Group of America, Inc. (Audi) is recalling certain 2019-2026 vehicles. Please see the recall report for a complete list of models. A software error may prevent the rearview camera image from displaying as intended. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 111, "Rear Visibility."
Consequence: A rearview image that does not display reduces the driver's view behind the vehicle, increasing the risk of a crash.
Remedy: Dealers will update the software, free of charge. Owner notification letters were mailed January 14, 2026. Owners may contact Audi customer service at 1-800-253-2834. Audi's number for this recall is 90TV. Vehicle Identification Numbers (VINs) involved in this recall became searchable on NHTSA.gov on December 23, 2025.
Size-standard part numbers — verify your connector type before buying. Rear blades are model-specific; check the package's vehicle list.
Fuel economy figures are EPA data via fueleconomy.gov (median across matching trims). Performance figures are compiled estimates for the 2026 Audi Q8 3.0L Turbo V6 and can vary by trim.
🔧 Database maintained under the daily editorial review of Chris Hackleman · Master Technician · 20+ years and Jeff Moore · Master Lexus & Toyota Mechanic · 20+ years.