Replacement cost: €250–450 parts + €100–150 dealer fitting

Prevention cost: ~€60–80 (CTEK lithium charger)

The Taycan uses a 12V lithium-ion auxiliary battery alongside its 800V drive system. This 12V battery powers doors, locks, the frunk release, and all the electronics needed to wake up the main system. If it dies, nothing works — you can’t open the car, can’t charge, can’t drive.

On 2020 models in particular, a production flaw with certain battery suppliers caused early failures. Later models improved, but the underlying issue remains: if the car sits unused for around 10–14 days (especially in cold weather), the 12V can drain completely. The high-voltage battery is supposed to top it up, but owner experience shows this doesn’t always work reliably when the car is parked for extended periods.

If the 12V is already dead and the car won’t open: the emergency 12V terminal is accessible through a pull-out behind the driver-side fuse panel. Use a NOCO Boost or similar jump-starter on “dumb” mode to bring the battery back to life, then drive for 30 minutes to let the system fully recharge it.

Dealer diagnostic fee: €80–180 (if it gets that far)

OTA update: €0

The Taycan runs on dozens of interconnected control units. When they disagree with each other — or when outdated software misinterprets sensor data — you get warning lights, the PCM freezing, erratic range estimates, or in more alarming cases the red “stop the vehicle in a safe place” screen. The good news: the vast majority of these are false positives triggered by software, not hardware failure.

The 2020 model year had the worst software instability. Porsche has issued multiple OTA updates since launch that specifically address charging errors, power management, and false-positive warning triggers. If you’ve never run a software update, do it — it’s the single most effective maintenance action you can take.

Full brake service (pads + rotors): €400–900 dealer

Home fix cost: €0

Because the Taycan does most of its deceleration through regenerative braking, the physical disc brakes see very little use in normal driving. Rotors that go weeks without contact with the pads develop a thin layer of surface rust — you’ll hear it as a metallic scraping or squeal, especially first thing in the morning or after rain. This is normal, not a defect. Porsche confirmed it when multiple owners raised it.

What’s less benign is that if the rust is left to build up for months, it can become uneven and cause juddering. Out-of-warranty rotor replacement on a Taycan runs to real money given the four-piston calipers and 360–420mm discs depending on trim.

Per tire (OEM fitment): €250–500 (Pirelli P Zero Elect, Michelin Pilot Sport EV)

Monthly pressure check: €0

The Taycan weighs around 2,300 kg. It sits on 20" or 21" low-profile performance tires. It has instant, massive torque available at all times. This is a perfect recipe for tire wear, and owners — particularly Turbo S owners with the most aggressive torque outputs — report front tires wearing significantly faster than the rear, and some see uneven wear across the width of the tire.

The tires themselves are OEM-specified EV-compound rubber (the Pirelli P Zero Elect and Michelin Pilot Sport EV are the most common fitments), which are expensive to replace. Porsche dealers and independent specialists in Europe typically quote €250–500 per tire, with four-corner replacements easily crossing €1,500 including fitting and alignment.

Cost: €0 (software update + technique)

The Taycan is rated for up to 270 kW DC fast charging on the Performance Battery Plus. In practice, many owners report seeing 60–120 kW at stations that advertise 150 kW+. This frustrates owners who planned charging stops around the rated speed. The issue is a combination of factors: station-side limits, battery temperature, and — particularly on early software versions — inconsistent communication between the car and the charger.

Cost to fix: CHF/€119

This one is mentioned constantly in Taycan owner forums and deserves its own section. Porsche includes a wireless charging pad hidden under a lid in the centre console. In practice it is largely useless for iPhone users: the lid traps heat, which causes iPhones to display thermal throttling warnings in warm weather; the camera bump on iPhone 14 and later physically prevents the phone from lying flat against the charging surface; and the phone is invisible and inaccessible while charging. Most Taycan owners stop using it within weeks.

This is also the same charger that contributes to the Taycan’s interior clutter problem more broadly: with no viable solution in the console, owners resort to vent clips (which stress Porsche’s precision-machined ventilation) or dash mounts (which cover the leather and cause irreversible UV exposure differences over time).

Sensor replacement (dealer): €300–800

OTA / recalibration: €0

Some Taycans display adaptive air suspension warnings or ride height errors — the car sitting unevenly, warning lights about suspension mode, or the system refusing to lower or raise for sport and comfort settings. In many cases this is not a hardware failure but a calibration drift or a voltage fluctuation that confuses the sensor readings.

Cost to owner: €0 — covered by active recall

This is the most serious issue affecting the Taycan. Multiple NHTSA and EU recalls cover a potential short circuit within the high-voltage battery modules across 2020–2024 production. The consequence of a short circuit is an increased risk of fire. Porsche has been proactive: affected owners are advised to charge to a maximum of 80% until the remedy is completed, and dealers are replacing battery modules at no charge.

If you’re buying a used Taycan: verify that all open recalls have been completed before purchase. This is particularly important for 2020–2022 model years where the greatest number of battery module replacements are outstanding.