Our First Electric Supercar Porsche Taycan Failed Because Of ONE Small Mistake

This Porsche Taycan electric supercar came in completely dead… and the real cause surprised us. Our Porsche Taycan electric supercar is finally back for Part 2… but we quickly realise the damage goes deeper than expected. After replacing the rear inverter and electric motor in Part 1, the Taycan still refused to come alive. That meant only one thing — the high voltage battery had to come back out. In this episode we: strip the HV battery again inspect the battery safety box find a blown fuse and faulty relay reassemble the battery program and bleed the system carry out a full road test reveal the real cause of the original failure break down the total repair cost And the truth is… this entire Porsche Taycan failure could likely have been avoided. This is one of the most comprehensive EV repairs we’ve done: ⚡ rear inverter replacement ⚡ rear motor replacement ⚡ HV battery strip down ⚡ safety box repair ⚡ immobiliser programming ⚡ cooling / thermal management diagnosis ⚡ motorway road test ⚡ final cost breakdown ⏱️ CHAPTERS 00:00 – 😱 Massive Problem, Again 00:41 – 🔋 Battery Has To Come Out… Again 01:53 – ⚠️ Why The Taycan Still Won’t Go READY 03:28 – 🧠 Inside The HV Battery 04:41 – ⚡ Short Circuit Theory 06:55 – 🧰 The Safety Box Comes Apart 08:22 – 💥 Blown Fuse Found 09:40 – ✅ Relay Also Faulty 10:49 – 🔄 Reassembly Begins 12:53 – 👀 Moment Of Truth 14:15 – 🟢 READY At Last! 16:24 – 🛠️ Still More Problems To Solve 18:20 – 💻 Immobiliser Programming 22:07 – 🌡️ Cooling System Bleed Procedure 23:53 – 🚨 More Faults In The Front End 26:25 – ❄️ AC Not Cooling Properly 27:12 – 🧊 Regas & Cooling Check 29:53 – 🚗 First Road Test 33:17 – 🔌 Charging Surprise 35:25 – 🧑‍🔧 Front End Faults Fixed 36:28 – 🌀 Taycan Thermal Management Explained 39:38 – ⚠️ Dangerous Cooling Mistakes Found 44:15 – 📋 Final Fault Check 46:28 – 🛣️ Motorway Test Begins 49:52 – 🔋 Battery Health & Temperature Check 54:11 – ✅ Final Inspection 57:09 – 🧩 The Real Cause Revealed 59:52 – 💸 Repair Cost Breakdown 1:03:24 – 🎬 Final Verdict 📍 Visit Us: OGS Mechanics Units 9–14, Millers Yard Rear of 28 Long Lane London N3 2QG 📺 Watch Our Repairs in Action: 📌 Subscribe on YouTube → Weekly EV/Hybrid breakdowns, fixes & full diagnostics 📲 Follow the Behind-the-Scenes Garage Life: 🎵 TikTok:   / ogsmechanics   📸 Instagram:   / ogs_mechanics   📘 Facebook: https://www.facebook.com/share/15J54K... #PorscheTaycan #PorscheEV #ElectricSupercar #EVRepair #TaycanProject #HighVoltage #ElectricCarRepair #SupercarBuild #EVBreakdown #PorscheLife #CarRebuild #AutoRepair #HybridAndEV #OGSMechanics #ElectricVehicle #PorscheTaycan #ElectricSupercar #TaycanRepair #EVDisaster #HighVoltageBattery #SupercarProblems #EVProject #PorscheBreakdown #ElectricMotor #InverterFailure #CarYouTube #AutoTech #RebuildProject Credits: Music: Adrenaline by #soundridemusic Link to Video:    • Cinematic Trailer Teaser NoCopyright Backg...   Music from #InAudio: https://inaudio.org/ Track Name.Sport Rock Energetic by Infraction [No Copyright Music] / Running Faster