IsItAGoodCar
Reliability Guide

Common Problems with the
2020 Porsche Taycan

We've identified 3 known issues that can affect the 2020 Porsche Taycan. 1 of these are serious faults that could be expensive to repair.

3
Known Issues
1
Serious
2
Moderate
0
Minor

All Known Issues

12V Battery Drain / Failure

SeriousElectrics & Electronics

Software glitches can drain the 12V lithium battery while parked. If it dies, the car cannot be started.

Est. Repair Cost: £2,000–£2,500
Warning Signs:

Car won't unlock, Total loss of power, "12V battery support" message

What to Inspect:
  • Check if battery management software updates are applied
Verified by IsItAGoodCar Research Team

High Voltage (HV) Heater Failure

ModerateInterior & Trim

The heater unit fails internally, meaning no cabin heat. A common issue in colder climates.

Est. Repair Cost: £1,000–£1,500
Warning Signs:

No cabin heat despite settings

What to Inspect:
  • Test heater thoroughly during test drive
Verified by IsItAGoodCar Research Team

Charging Errors

ModerateElectrics & Electronics

"Error Charging" messages, aborted DC fast-charge sessions, or charge rates that never reach advertised speeds. Can be car-side or charger-side.

Est. Repair Cost: £0–£500 (Software update / diagnosis)
Warning Signs:

Error Charging message, Aborted DC fast-charge, Slow charge rates

What to Inspect:
  • Test DC fast charging on multiple chargers
  • Check for charging fault codes
Verified by IsItAGoodCar Research Team

Buying Tips for 2020 Porsche Taycan

  • ✓Check for 12V battery recalls (ARB6/ARA4); these are critical to prevent the car "bricking".
  • ✓Ensure the HV heater is functioning; failures are a known issue on 2020-2022 cars.
  • ✓Check the PCM software version; newer builds are significantly more stable.
20192021
Check a 2020 Porsche Taycan by Registration