🏷️ Basic Information

Make:

Jeep

Model:

Wrangler

Model Line:

Wrangler (JK)

Years Covered:

2007, 2008, 2009

Platform Code:

JK

👋 Introduction

Positioning:

The Jeep Wrangler (JK) is an iconic off-road vehicle renowned for its capability and rugged design. This manual targets owners and professional technicians seeking authoritative repair and maintenance data.

Competitors Covered:

While the Wrangler is in a class of its own for off-road focus, this manual provides the detail necessary to maintain and repair it against any other rugged SUV or off-road vehicle.

Off Road Focus:

Detailed information on robust suspension, 4x4 systems, and durable powertrain components specifically designed for off-road use.

Ease Of Maintenance:

Provides the necessary procedures and specifications to perform regular maintenance and common repairs, enhancing vehicle longevity and owner satisfaction.

Technical Accuracy:

Directly sourced from Jeep factory documentation, ensuring accuracy and completeness for all repair and diagnostic procedures.

📋 Manual Details

General Coverage:

Comprehensive service and repair for Jeep Wrangler JK models 2007-2009.

Mechanical Coverage:

Engine, drivetrain, suspension, steering, brakes, exhaust, fuel system.

Electrical Coverage:

Wiring diagrams, lighting, ignition, charging system, accessories, body control module (BCM).

Body Coverage:

Body panel repair, doors, windows, interior trim, convertible top.

Estimated Page Count:

~2000-3000 (typical for comprehensive factory service manuals of this era, exact count varies)

Type:

Factory Service Manual (FSM) / Repair Manual

Language:

English

Format:

Digital (PDF) - searchable, printable

📖 Manual Coverage

Powertrain:

Engine overhaul, cooling system, lubrication system, fuel delivery, exhaust system, ignition system, starting system, charging system.

Drivetrain:

Transfer case operation and repair, axle servicing (front and rear), propeller shafts, CV joints.

Chassis:

Front and rear suspension systems, steering system, power steering, wheel bearings, brake system (front and rear disc brakes, ABS).

Electrical And Electronics:

Battery, alternator, starter, fuses, relays, lighting (headlamps, taillamps, interior), power windows, power locks, horn, wipers, climate control electronics, instrument cluster, powertrain control module (PCM) diagnostics.

Body And Interior:

Bumpers, fenders, hood, doors, tailgate, side panels, interior trim panels, seats, convertible top mechanisms, glass replacement.

Maintenance:

Oil change, fluid checks and changes, filter replacements, spark plug replacement, belt inspection and replacement, brake pad replacement, tire rotation.

Diagnostics:

Troubleshooting flowcharts, symptom-based diagnostics, diagnostic trouble codes (DTCs), OBD-II testing.

Repair:

Component removal and installation, overhaul procedures for major assemblies, seal and gasket replacement, wiring harness repair.

Specifications:

Torque specifications, fluid capacities, diagnostic parameters, alignment specifications, engine timing.

Depth:

Full factory service level, covering everything from routine maintenance to complete engine and transmission rebuilds, advanced electrical diagnostics, and structural repairs.

📊 Manual Specifications

Format:

PDF

Searchability:

Fully searchable text content for quick information retrieval.

Printability:

Printable pages, allowing users to print specific sections or the entire manual.

Image Resolution:

High-resolution diagrams and images for clarity.

Binding:

N/A (Digital Format)

Paper:

N/A (Digital Format)

⚙️ Engine Specifications

Engine Code And Description:

3.8L V6 (2007-2009) - PowerTech Engine (Engine Code EKG)

Horsepower:

202 hp @ 5200 rpm (approximate)

Torque:

237 lb-ft @ 4000 rpm (approximate)

Bore X Stroke:

3.92 x 3.56 in (100 x 90.5 mm)

Compression Ratio:

9.6:1

Induction:

Sequential Multi-Port Fuel Injection (MPI)

Fuel Type:

Unleaded gasoline, 87 octane recommended

Coolant Type:

Mopar Antifreeze/Coolant (OAT) - Pink (Chrysler)

Oil Type:

SAE 5W-30 Synthetic Motor Oil

Oil Capacity:

5.0 US quarts (4.7 liters) with filter change

ECU Type:

Chrysler SBEC/NGC PCM (Powertrain Control Module)

🔧 Transmission

Transmission Type:

6-speed Manual Transmission (NSG370)

Transmission Type:

4-speed Automatic Transmission (42RLE)

Manual Transmission Fluid:

API GL-3 or GL-4 (SAE 75W-90 Gear Oil)

Automatic Transmission Fluid:

Mopar ATF+4 (MS-9602)

Transfer Case Model:

NV241G for 2-Door, NV241OR (Rock-Trac) for Rubicon

Transfer Case Fluid:

Mopar NV241 Transfer Case Fluid or equivalent (typically Dexron III/Mercon equivalent for NV241G, specific fluid for Rock-Trac)

📐 Dimensions

Wheelbase 2 Door:

95.4 inches (2423 mm)

Wheelbase 4 Door Unlimited:

116 inches (2946 mm)

Length 2 Door:

160.9 inches (4087 mm)

Length 4 Door Unlimited:

183.4 inches (4658 mm)

Width Without Doors:

73.9 inches (1877 mm)

Height To Soft Top:

70.9 inches (1801 mm)

Curb Weight 2 Door:

4,077 lbs (1849 kg)

Curb Weight 4 Door Unlimited:

4,553 lbs (2065 kg)

Towing Capacity 2 Door:

2,000 lbs (907 kg)

Towing Capacity 4 Door Unlimited:

3,500 lbs (1588 kg)

Payload Capacity 2 Door:

850 lbs (386 kg)

Payload Capacity 4 Door Unlimited:

1,100 lbs (499 kg)

Standard Wheel Size:

17-inch aluminum alloy

Standard Tire Size:

P255/75R17 OWL (On/Off-Road, White Lettered)

Bolt Pattern:

5x5 inches (127 mm)

🛡️ Safety Features

NHTSA Rollover Rating 2 Door:

4 stars (out of 5)

NHTSA Rollover Rating 4 Door:

5 stars (out of 5)

ABS:

Standard Anti-lock Braking System (ABS)

Traction Control:

Standard Traction Control System (TCS)

Electronic Stability Control:

Standard Electronic Stability Control (ESC) with Roll Mitigation

Airbags:

Driver and front passenger airbags, optional side curtain airbags for Unlimited models.

Seat Belts:

3-point seat belts with pretensioners.

Body Structure:

Reinforced safety cage construction.

💡 Technology Features

Infotainment System:

Base Uconnect systems with CD/MP3 player, optional navigation, satellite radio, and Bluetooth connectivity.

Speaker System:

Standard 6-speaker system, optional Infinity premium audio.

Basic Features:

Cruise control, tilt steering wheel.

Auxiliary Input:

Standard auxiliary audio input jack.

Remote Keyless Entry:

Optional feature on some trims.

🔧 Maintenance

Oil And Filter Change:

Every 6,000 miles or 6 months, whichever comes first.

Engine Air Filter Replacement:

Every 15,000 miles or 12 months, or as needed based on conditions.

Cabin Air Filter Replacement:

Every 15,000 miles or 12 months.

Spark Plug Replacement:

Every 100,000 miles (for original equipment platinum or iridium plugs).

Transmission Fluid Change Auto:

Every 60,000 miles or as needed.

Transmission Fluid Change Manual:

Every 60,000 miles or as needed.

Transfer Case Fluid Change:

Every 60,000 miles or as needed.

Brake Fluid Change:

Every 30,000 miles or 24 months.

Coolant Capacity:

Approximately 10.0 US quarts (9.5 liters)

Brake Fluid Type:

DOT 3

Power Steering Fluid Type:

Mopar Power Steering Fluid or equivalent (Dexron III/Mercon equivalent may be applicable, check specific vehicle for certainty)

Common Issues 3.8L V6:

Lifter tick/noise, potential oil leaks from valve cover gaskets, throttle body issues.

Common Issues Transfer Case:

Issues with 4WD engagement on some models, potential leaks from seals.

Common Issues Suspension:

Worn ball joints and control arm bushings due to off-road use.

Common Issues Electrical:

Water intrusion affecting electronics (especially with aftermarket modifications or heavily used vehicles), clock spring issues.

📚 Vehicle History

Jeep Legacy:

Jeep has a storied history of producing rugged, go-anywhere vehicles dating back to its military origins in World War II.

Jk Generation Intro:

The JK generation marked a significant redesign for the Wrangler, introducing a wider track, longer wheelbase options (Unlimited), and a more refined interior, while retaining its core off-road DNA.

Jk Body Styles:

Available in 2-door (Wrangler) and 4-door (Wrangler Unlimited) configurations.

Jk Trim Levels Common:

Sport, Sahara, Rubicon.

Manufacturing Plant:

Toledo North Assembly, Toledo, Ohio, USA.

🏆 Awards & Recognition

Off Road Acclaim:

Consistently recognized by off-road enthusiasts and publications for its unmatched capability and customization potential.

Consumer Reports Reliability:

Reliability ratings vary by year and specific components; this manual is crucial for addressing potential issues.

Manual Certification:

Factory original documentation ensures adherence to all OEM standards and procedures.