2021 Jeep Wrangler Service and Repair Manual

2021 Jeep Wrangler service and repair manual — a detailed, factory-style reference for maintenance, diagnostics, and repair. Use it to confirm correct procedures, specifications, and system coverage before you start work.

Designed for technicians and DIY owners, this manual helps you diagnose issues correctly, follow proven repair steps, and use wiring diagrams and system sections to track faults faster.

What’s included

• Step-by-step repair procedures and service information
• Specifications and reference data (where provided)
• Electrical diagnostics with wiring diagrams
• Coverage across major systems: engine, transmission/driveline, brakes, steering, suspension, HVAC, and more

Trims covered

• Unlimited Rubicon Sport Utility 4-Door
• Islander Sport Utility 2-Door
• Unlimited Rubicon 4xe Sport Utility 4-Door
• Sport S Sport Utility 2-Door
• Unlimited Sport S Sport Utility 4-Door
• Unlimited High Altitude 4xe Sport Utility 4-Door
• Unlimited Sahara 4xe Sport Utility 4-Door
• 80th Anniversary Sport Utility 2-Door
• Unlimited Willys Sport Sport Utility 4-Door
• Willys Sport Utility 2-Door
• Sport Sport Utility 2-Door
• Unlimited Sahara High Altitude Sport Utility 4-Door
• Unlimited Willys Sport Utility 4-Door
• Willys Sport Sport Utility 2-Door
• Freedom Sport Utility 2-Door
• Unlimited High Altitude Sport Utility 4-Door
• Unlimited Freedom Sport Utility 4-Door
• Unlimited Sport Sport Utility 4-Door
• Unlimited Sport Altitude Sport Utility 4-Door
• Unlimited Rubicon 392 Sport Utility 4-Door
• Rubicon Sport Utility 2-Door
• Unlimited Sahara Altitude Sport Utility 4-Door
• Unlimited Sahara Sport Utility 4-Door
• Unlimited 80th Anniversary Sport Utility 4-Door
• Unlimited Islander Sport Utility 4-Door

Engines covered

• 3.0L 2987CC 182Cu. In. V6 DIESEL DOHC Turbocharged
• 3.6L 3604CC 220Cu. In. V6 MILD HYBRID EV-GAS (MHEV) DOHC Naturally Aspirated
• 2.0L 1997CC 122Cu. In. l4 GAS DOHC Turbocharged
• 3.6L 3604CC 220Cu. In. V6 GAS DOHC Naturally Aspirated
• 2.0L 1997CC 122Cu. In. l4 PLUG-IN HYBRID EV-GAS (PHEV) DOHC Turbocharged
• 6.4L 6424CC 392Cu. In. V8 GAS OHV Naturally Aspirated

Index / Table of contents

• Body
• Brakes
• Chassis Electrical
• Driveline
• Engine Cooling
• Engine Electrical
• Engine Mechanical
• Engine Performance & Emission Controls
• Fuel System
• General Information & Identification
• Heating, Ventilation, & Air Conditioning
• Hybrid & Electric Vehicle Systems
• Steering
• Suspension
• Transmission, Clutch, & Transfer Case
• Wiring Diagrams