2018–2021 Jeep Wrangler 3.6 Alternator Replacement DIY

2018–2021 Jeep Wrangler 3.6 alternator replacement DIY guide. Step-by-step removal of the alternator, serpentine belt tensioner release, and charging system repair. In this video I show how to replace the alternator on a Jeep Wrangler Rubicon with the 3.6 Pentastar engine. The repair includes removing the intake assembly, releasing the serpentine belt tensioner, removing the alternator bolts, and installing the new OEM alternator. This repair fixes low charging voltage and battery warning lights. ⏱ TIMESTAMPS 00:00 – Jeep Wrangler Charging Problem 01:05 – Disconnecting Battery 02:00 – Removing Intake Assembly 03:00 – Accessing Belt Tensioner 04:10 – Removing Serpentine Belt 05:10 – Alternator Bolt Locations 06:20 – Removing Alternator 07:40 – Installing New Alternator 09:00 – Reinstalling Belt 10:00 – Charging System Test 🔧 Vehicle Info 2018 Jeep Wrangler Rubicon 3.6L Pentastar V6 🔧 Also Applies To 2018 Jeep Wrangler JL 2019 Jeep Wrangler JL 2020 Jeep Wrangler JL 2021 Jeep Wrangler JL (Same Pentastar alternator layout) 🛠 Tools & Parts Used • 10mm socket • 13mm socket • 15mm socket • 1/2" breaker bar (belt tensioner) • Ratchet and extensions • Replacement alternator Optional: • Battery charger • Multimeter 🔧 Job Time & Difficulty ⏱ 1–2 Hours ⚙ Difficulty: Moderate ⚠ Always disconnect the battery before alternator work. ⚠ Verify charging voltage after installation. Normal charging voltage should be 13.5–14.5 volts. 📌 PINNED COMMENT If your Jeep is showing low charging voltage or battery warning lights, the alternator may be failing. Drop your Wrangler year below 👇 I’ll help confirm the repair. 📌 CONNECT WITH ME My Website www.kevinsmobilerepair.com Subscribe for more repair videos @kevinsmobileautomotiverepair 👍 LIKE & SUBSCRIBE for more real-world repair walkthroughs. 🚀 GROW YOUR CHANNEL 📈 Get vidIQ to grow your channel faster https://vidiq.com/KevinsMobileAuto ⚠ DISCLAIMER This video is for educational purposes only. Always follow manufacturer repair procedures when working on charging systems. 🎵 MUSIC CREDITS Team Building by 2TECH-AUDIO | https://2tech-audio.bandcamp.com Music promoted by www.free-stock-music.com Creative Commons Attribution 3.0 License https://creativecommons.org/licenses/by/3.0/deed.en_US #️⃣ HASHTAGS #JeepWrangler #AlternatorReplacement #JeepRepair #DIYAutoRepair #Pentastar #KevinMobileRepair