Audi Q4 FZ

Permanent magnet synchronous motor (PSM) with 89 kW at the rear axle — APP550 unit from the VW Group. Electric motors of this design are considered low-maintenance and long-lived. Charging flap and heat pump climate control show occasional defects in early models. Check for software updates early.

• !! Recall: electric parking brake can fail

  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.
  0–0 $
  Ad Bremscontrol unit Q4 e-tronEPB Software Update
• !! MMI infotainment freezes or reboots from 5,000 km

  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.
  0–500 $
  Ad MIB3 control unitMMI Displayeinheit Q4
• !! 12V battery deep discharge during standstill from 30,000 km

  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.
  150–400 $
  Ad 12V AGM battery Q4 e-tronDC-DC Wandler MEB

+ 2 more engine weaknesses + vehicle weaknesses

MEB platform rear axle motor in the Q4 e-tron 35. 125 kW peak power (approx. 70 kW continuous). Entry variant with the smaller 52 kWh battery. Proven MEB drivetrain from the VW Group.

• !! Recall: electric parking brake can fail

  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.
  0–0 $
  Ad Bremscontrol unit Q4 e-tronEPB Software Update
• !! MMI infotainment freezes or reboots from 5,000 km

  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.
  0–500 $
  Ad MIB3 control unitMMI Displayeinheit Q4
• !! 12V battery deep discharge during standstill from 30,000 km

  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.
  150–400 $
  Ad 12V AGM battery Q4 e-tronDC-DC Wandler MEB

+ 2 more engine weaknesses + vehicle weaknesses

MEB platform rear axle motor in the Q4 e-tron 40. 150 kW peak power (approx. 77 kW continuous). 82 kWh battery with up to 520 km range (WLTP). Solid MEB base with good everyday usability.

• !! Recall: electric parking brake can fail

  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.
  0–0 $
  Ad Bremscontrol unit Q4 e-tronEPB Software Update
• !! MMI infotainment freezes or reboots from 5,000 km

  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.
  0–500 $
  Ad MIB3 control unitMMI Displayeinheit Q4
• !! 12V battery deep discharge during standstill from 30,000 km

  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.
  150–400 $
  Ad 12V AGM battery Q4 e-tronDC-DC Wandler MEB

+ 2 more engine weaknesses + vehicle weaknesses

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.

• !! Recall: electric parking brake can fail

  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.
  0–0 $
  Ad Bremscontrol unit Q4 e-tronEPB Software Update
• !! MMI infotainment freezes or reboots from 5,000 km

  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.
  0–500 $
  Ad MIB3 control unitMMI Displayeinheit Q4
• !! 12V battery deep discharge during standstill from 30,000 km

  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.
  150–400 $
  Ad 12V AGM battery Q4 e-tronDC-DC Wandler MEB

+ 2 more engine weaknesses + vehicle weaknesses