🏷️ Basic Information

Make:

Jeep

Model:

Wrangler

Model Variant:

JK

Year:

2007

Chassis Code:

JK

👋 Introduction

Positioning:

The 2007 Jeep Wrangler (JK generation) represents a significant evolution in the Wrangler lineage, moving to a unibody-inspired body-on-frame construction with a stiffer chassis and improved on-road manners while retaining its legendary off-road capability. This manual targets owners and technicians who need authoritative, vehicle-specific information.

Competition:

Competes with vehicles like the Toyota FJ Cruiser, Toyota 4Runner (off-road variants), and Land Rover Defender (in some markets). Its core appeal is its unparalleled off-road prowess and iconic design, making specialized service information crucial for maintenance and repair.

Features:

Iconic Jeep design, unmatched off-road capability (4x4 system, solid axles), available in 2-door (Wrangler) and 4-door (Wrangler Unlimited) configurations. The JK generation introduced significant updates over the TJ model, including a longer wheelbase and more refined interior.

📋 Manual Details

Coverage:

All models and all repairs A-Z

Page Count:

Extensive (actual count varies by specific edition, typically 1000+ pages)

Type:

Service and Repair Manual

Language:

English

Format:

Print (potentially available as PDF depending on specific offering)

📖 Manual Coverage

Engine:

3.8L V6 (Engine code: EKG), including diagnostics, removal, installation, overhaul, cooling, lubrication, fuel, ignition, and emissions control systems.

Transmission Manual:

NSG370 6-speed manual transmission: disassembly, inspection, assembly, clutch operation, and control.

Transmission Automatic:

42RLE 4-speed automatic transmission: operation, diagnostics, adjustments, and overhaul.

Drivetrain:

4x4 systems, NV241GHD transfer case operation and service, Dana 30 front axle, Dana 44 rear axle, axle ratios, driveshafts, U-joints, and differential service.

Suspension:

Front and rear solid axle suspension, coil springs, shock absorbers, steering linkage, track bars, sway bars, and alignment specifications.

Brakes:

Front and rear disc brakes, ABS system (Antilock Braking System), brake fluid specifications, bleeding procedures, caliper and rotor service.

Steering:

Power steering system, steering column, steering gear (Bosch system), pump, and hoses.

Electrical:

Battery, charging system (alternator), starting system (starter motor), ignition system, lighting, instrument cluster, power windows, door locks, and fuse/relay identification and testing.

Body And Frame:

Body panel removal and installation, doors, hood, fenders, bumpers, interior trim, seats, convertible top (soft top and hard top) service, and frame inspection.

Climate Control:

HVAC system, A/C operation, refrigerant handling (R134a), blower motor, heater core, and climate control module diagnostics.

Restraints:

Airbag system diagnostics and service (SRS - Supplemental Restraint System), seat belt operation.

Diagnostics:

OBD-II (On-Board Diagnostics II) system, DTC (Diagnostic Trouble Code) interpretation, scan tool usage, and diagnostic flowcharts.

Maintenance:

Oil changes, filter replacements, fluid level checks and top-offs, tire rotations, brake inspections, tune-ups, and belt/hose inspections.

Repair:

Engine component repair (e.g., head gaskets, water pump, radiator), transmission repair, clutch replacement, brake caliper/rotor replacement, suspension component replacement (shocks, ball joints, tie rods), starter/alternator replacement, and body panel repair.

Troubleshooting:

Step-by-step diagnostic procedures for common and complex issues, pinpointing faults in electrical, mechanical, and fuel systems using wiring diagrams and flowcharts.

Installation:

Installation procedures for common replacement parts such as alternators, starters, radiators, water pumps, brake components, and suspension parts. May also cover accessory installations.

Depth:

Comprehensive, covering everything from basic scheduled maintenance to complete engine and transmission overhauls, including in-depth electrical diagnostics and bodywork.

📊 Manual Specifications

Format:

Likely high-resolution scans of original factory manual pages, often provided in PDF format for digital distribution.

Quality:

Professional-grade reproduction, ensuring clarity of text, diagrams, and photographs.

Binding:

If printed: Spiral-bound or perfect-bound for durability and ease of use in a workshop environment.

Paper:

If printed: Durable paper stock suitable for workshop conditions, often with coated pages to resist grease and dirt.

⚙️ Engine Specifications

Engine Code And Type:

3.8L (3778cc) V6, naturally aspirated, OHV (Overhead Valve), 12-valve. Engine Code: EKG.

Horsepower:

202 hp @ 5200 rpm

Torque:

237 lb-ft @ 4000 rpm

Fuel Delivery:

Multi-port fuel injection (MPI)

Fuel Type:

Unleaded gasoline, 87 octane recommended

Coolant Type:

Mopar Antifreeze/Coolant, 5-Year/100,000 Mile Formula (OAT - Organic Additive Technology), or equivalent meeting Chrysler MS-9769 specification. Typically a 50/50 mix with deionized water.

Oil Type:

SAE 5W-20, meeting Chrysler material standard MS-6395.

Oil Capacity:

5.0 US quarts (4.7 liters) with filter change.

Spark Plug Type:

Champion copper core, p/n 7070 (or equivalent such as NGK LZTR4A).

🔧 Transmission

Transmission Type:

NSG370 6-speed manual transmission

Transmission Type:

42RLE 4-speed automatic transmission

Clutch Type:

Hydraulically actuated, single dry plate

Gear Ratios 42Rle:

1st: 2.74, 2nd: 1.54, 3rd: 1.00, 4th: 0.69. Reverse: 2.07.

Automatic Transmission Fluid:

ATF+4 (MS-9602) fluid

Manual Transmission Fluid:

NSG370 requires manual transmission fluid meeting Chrysler MS-9224 specification (e.g., Mopar Manual Transmission Lubricant).

Automatic Transmission Capacity:

Approximately 7.5 US quarts (7.1 liters) for the 42RLE.

Manual Transmission Capacity:

Approximately 2.2 US quarts (2.1 liters) for the NSG370.

📐 Dimensions

Wheelbase:

95.4 inches (2423 mm)

Length:

160.0 inches (4064 mm)

Width:

73.7 inches (1872 mm)

Height:

70.9 inches (1801 mm) (soft top)

Wheelbase:

116.0 inches (2946 mm)

Length:

179.4 inches (4557 mm)

Width:

73.7 inches (1872 mm)

Height:

72.4 inches (1839 mm) (soft top)

Cargo Volume Behind Rear Seat:

13.4 cu ft

Cargo Volume With Rear Seat Folded:

46.4 cu ft

Cargo Volume Behind Rear Seat:

31.5 cu ft

Cargo Volume With Rear Seat Folded:

70.6 cu ft

Curb Weight 2Door:

Approx. 3,953 lbs (1793 kg) (manual transmission)

Curb Weight 4Door Unlimited:

Approx. 4,189 lbs (1899 kg) (manual transmission)

Towing Capacity:

2,000 lbs (907 kg) for 2-door, 3,500 lbs (1588 kg) for 4-door Unlimited (check specific trim/options)

Standard Wheel Size:

17 x 7.5 inch steel or alloy

Standard Tire Size:

P255/75R17

Bolt Pattern:

5x5 inch (127mm)

🛡️ Safety Features

NHTSA Frontal Crash Test:

4 Stars (driver and passenger)

NHTSA Side Impact Crash Test:

5 Stars (all seating positions)

IIHS Rollover Rating:

4 Stars (Achieved 75% of the 4-star performance required for a 5-star rating)

ABS:

Standard 4-wheel disc brakes with ABS (Antilock Braking System)

Traction Control:

Standard Electronic Stability Control (ESC) and Traction Control System (TCS)

Rollover Mitigation:

Standard Rollover Mitigation

Airbags:

Standard front advanced multi-stage airbags for driver and front passenger.

Seatbelts:

3-point seat belts with pretensioners in front and rear. Available front seat active head restraints.

💡 Technology Features

Audio System Options:

Standard AM/FM CD player, optional Infinity premium audio system with subwoofer. Uconnect infotainment system with voice command and Bluetooth was introduced later in the JK generation but may have aftermarket options available for 2007.

Standard Features:

Standard Electronic Stability Control (ESC), Traction Control System (TCS), and Rollover Mitigation.

Connectivity Options:

For 2007, connectivity was primarily limited to optional satellite radio and auxiliary audio input jacks. Bluetooth and Uconnect became more prevalent in subsequent model years.

🔧 Maintenance

Oil Change Interval:

Every 6,000 miles (9,656 km) or 6 months, whichever comes first, under normal driving conditions. Severe conditions may require more frequent changes.

Tire Rotation:

Every 6,000 miles (9,656 km)

Engine Air Filter:

Inspect every 15,000 miles (24,140 km), replace as needed or every 30,000 miles (48,280 km).

Cabin Air Filter:

Inspect annually, replace as needed or every 15,000-30,000 miles (24,140-48,280 km) depending on environment.

Coolant Replacement:

First change at 100,000 miles (160,934 km) or 5 years. Subsequent changes every 60,000 miles (96,560 km) or 5 years.

Brake Fluid:

DOT 3, meeting Chrysler MS-5779.

Power Steering Fluid:

Mopar Power Steering Fluid or equivalent meeting Chrysler MS-5901 specification.

Engine Coolant Capacity:

Approximately 11.6 US quarts (11.0 liters) for V6 engine.

Clutch Wear:

Manual transmission clutches can experience premature wear, especially in off-road use or with aggressive driving.

Oil Leaks:

Potential for oil leaks from valve cover gaskets or oil pan gaskets over time.

Suspension Wear:

Ball joints, tie rod ends, and sway bar links can wear faster due to the stresses of off-road driving and solid axle articulation.

Heating System Performance:

Some owners report slower-than-expected heater performance in extreme cold, potentially related to airflow or coolant flow design.

Powertrain Control Module:

Occasional reports of PCM (Powertrain Control Module) issues leading to various driveability problems.

📚 Vehicle History

Jeep Legacy:

The Jeep brand has a rich history dating back to World War II, establishing itself as a symbol of ruggedness and off-road capability. The Wrangler is the spiritual successor to the original Willys Jeep.

Jk Generation Intro:

The 2007 model year marked the introduction of the JK generation, a complete redesign replacing the TJ. Key changes included a significantly stiffer chassis, a new 3.8L V6 engine, available 4-door Unlimited model, and revised interior/exterior styling.

Manufacturing Location:

Toledo Complex, Toledo, Ohio, USA.

Production Years Jk:

2007-2018

🏆 Awards & Recognition

Off Road Awards:

Consistently recognized for its off-road capability by automotive publications and off-road enthusiasts. Often cited as a benchmark for its segment.

Residual Value:

Jeep Wranglers are known for strong residual values, indicating sustained market demand and desirability.