Audi Q4 45 e-tron quattro
MEB platform dual-motor in the Q4 e-tron 45 quattro. 195 kW system output (two motors). Front axle motor uses induction-based ASM (max. 75 kW). Rear axle motor is a permanent magnet synchronous machine.
Solid electric drive — competent, not exciting
265 hp electric drive for daily use — composed and quiet, but without a special driving character.
Engine Weaknesses 5
Software fault in the brake control unit can under certain conditions cause failure of the electric parking brake. Approx. 110,000 vehicles worldwide affected (built 2020–2023). KBA number 14877R, manufacturer code 454R.
Symptoms: Red parking brake warning light not constant, vehicle can roll away. Two damage cases documented, no injuries.
The MIB3 infotainment freezes particularly often at temperatures below approx. 3.5 °C. Black screen or complete reboot during driving. Audi confirmed the fault as a defect in a control unit and had no solution for a long time.
Symptoms: Black centre screen during driving, navigation disruption, no sound. Reboot by pressing the volume knob for a long time needed.
The 12V electrical system deep-discharges during extended standstill (from around 3–4 weeks) as the DC/DC converter system does not reliably keep the vehicle awake. The vehicle then no longer starts and must be recovered.
Symptoms: Vehicle completely unresponsive after standing, no response to key fob, parking brake remains applied. Jump start needed.
Charging stops without an error message or with "fault in the charging infrastructure". CCS plug occasionally locks in the charging port in exceptional cases. Problem occurs at various stations, not infrastructure-specific.
Symptoms: Charging station shows fault, vehicle aborts charging. Error message "charging system fault" on display. CCS plug cannot be unlocked.
The Q4 50 e-tron quattro (195 kW) required improvement to the front axle drive, which is why Audi switched to the APP550 with revised gearbox and pulse inverter. Older vehicles (pre-MY2024) may exhibit rougher drivetrain behaviour.
Symptoms: Slight judder or vibration on pull-away, audible gearbox noises at low speeds. Workshop update or replacement for severe symptoms.
Vehicle Weaknesses 4
Software fault in the brake control unit can cause the parking brake to not engage correctly. 109,684 vehicles worldwide affected.
Infotainment freezes or restarts, temporarily disabling safety systems. Improved by software update 3.2.
The myAudi app regularly loses its vehicle connection. Remote preheating and charge monitoring work unreliably.
Drum brakes rust quickly during standstill periods as the vehicle primarily brakes via the electric motor and the mechanical brakes are rarely used.