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Fitment notes: 12V auxiliary battery; located under hood; primary high-voltage traction battery separate
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Every control module on the 2022-2026 Audi Q4 Sportback e-tron — 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.
High-Voltage Battery Junction Box / Power Distribution Module (HVJB)3.5 hr R&Rsecurity gateway +1.0 hr▸ programming details
📍 Front motor compartment, center firewall area
🔧 VAS 6154/6160 + ODIS-E
⚠️ Contains contactors, fuses, and safety interlocks for high-voltage system. High-voltage lockout mandatory. Coding for system configuration and safety parameters.
📍 Integrated into electric drive unit, front motor compartment (rear on AWD)
🔧 VAS 6154/6160 + ODIS-E or Autel + AutoAuth
⚠️ Single-speed reduction gearbox. Rarely serviced separately from motor controller. Adaptation required for shift characteristics and motor torque mapping.
Motor Electronics Control Module (MECM)2.8 hr R&Rsecurity gateway +1.0 hr▸ programming details
📍 Front motor compartment, mounted on electric drive unit (rear motor on dual-motor AWD variants has integrated controller)
🔧 VAS 6154/6160 + ODIS-E or Autel IM608/MaxiSys Ultra + AutoAuth
⚠️ Controls AC synchronous motor. Dual-motor AWD models have second controller integrated into rear drive unit (add 3.2 hours R&R). Requires motor adaptation and high-voltage system calibration.
Electric Power Steering Control Module (EPS)2.5 hr R&Rsecurity gateway +0.8 hr▸ programming details
📍 Integrated into steering column assembly, below dashboard
⚠️ Keyless entry/start system. Key fob programming requires dealer access or advanced aftermarket tools with gateway unlock. Immobilizer data transfer from old module if available.
⚠️ 10.1-inch or 11.6-inch touchscreen (market dependent). Requires navigation database transfer and user profile setup. Dealer coding for feature activation (e.g., Apple CarPlay, Android Auto).
⚠️ Power passenger seat on Premium Plus/Prestige. Seat position relearn required.
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.
Volkswagen Group of America, Inc. (Volkswagen) is recalling certain 2024-2025 AUDI Q4 E-Tron SUV, AUDI Q4 E-Tron Sportback, and 2024 ID.4 vehicles. The on-board charger (OCDC) may fail and stop charging the 12-volt battery, which can result in a loss of drive power.
Consequence: A loss of drive power increases the risk of a crash.
Remedy: Dealers will replace the OCDC, free of charge. Owner notification letters were mailed on May 20, 2025. Owners may contact Volkswagen customer service at 1-800-893-5298 or Audi customer service at 1-800-253-2834. Volkswagen's number for this recall is 93CJ. Audi's number for this recall is 93FR.
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 2025 Audi Q4 Sportback e-tron 40 Single Motor RWD 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.