🏷️ Basic Information

Make:

Ford

Model:

Focus

Year:

2003

Platform:

C170

👋 Introduction

Market Position:

The 2003 Ford Focus was a significant model in the compact car segment, known for its European-derived chassis and engaging driving dynamics. It competed with popular rivals such as the Honda Civic, Toyota Corolla, and Volkswagen Golf. This manual caters to owners and technicians working on this generation of a well-regarded, driver-focused vehicle.

Competitive Analysis:

The Ford Focus of this era was lauded for its 'world car' design, offering a balance of refinement, handling, and practicality that often surpassed its Japanese and American competitors in terms of driving feel. Its independent rear suspension (on many models) contributed to its superior road manners. This workshop manual provides the detailed technical information needed to maintain and repair these specific advantages.

Key Features:

This manual is a critical resource for diagnosing and repairing the 2003 Ford Focus, covering a wide range of engine options and configurations. Its comprehensive nature makes it invaluable for both routine maintenance and complex repairs, ensuring the longevity and optimal performance of the vehicle.

📋 Manual Details

Coverage Areas:

Engine, Transmission, Drivetrain, Suspension, Steering, Brakes, Electrical System, HVAC, Body, Chassis, Diagnostics, Troubleshooting, Repair Procedures, Maintenance Schedules, Specifications, Wiring Diagrams, Component Locations

Page Count:

Approximately 2500+ pages (typical for a comprehensive workshop manual)

Manual Type:

Workshop Service Repair Manual

Language:

English

Format:

Digital (likely PDF)

📖 Manual Coverage

Systems Covered:

Engine Mechanical (including 2.0L SPI, 2.0L DOHC Zetec, 2.3L DOHC Duratec), Engine Control Systems (PCM, sensors, actuators), Fuel System, Ignition System, Exhaust System, Cooling System, Lubrication System, Clutch, Manual Transmission (MTX-75, IB5), Automatic Transmission (AX4S, AX4N, 4F50N), Antilock Braking System (ABS), Traction Control System (TCS), Power Steering, Front Suspension (MacPherson Strut), Rear Suspension (Independent Multi-link), Wheel Alignment, Brake System (Disc/Drum), Parking Brake, Body Electrical, Lighting, Instrumentation, Climate Control (HVAC), Restraints (Airbags), Security System, Body and Chassis Repair, Exterior Trim, Interior Trim, Glass, Wipers and Washers, Emissions Controls

Procedures Included:

Routine Maintenance (oil changes, filter replacements, fluid checks), Component Removal and Installation (engine, transmission, suspension parts, brake components, electrical modules), Troubleshooting Guides (symptom-based diagnostics), Repair Procedures (engine rebuilds, transmission overhauls, suspension adjustments), Electrical System Diagnostics (wiring diagrams, component testing), Bodywork and Collision Repair, HVAC System Repair, Emissions System Diagnosis and Repair, Torque Specifications, Component Specifications, Special Tool Recommendations, Diagnostic Trouble Codes (DTCs) and their interpretation and resolution

Technical Depth:

Comprehensive. Covers everything from basic preventative maintenance and fluid changes to in-depth engine and transmission overhauls, complex electrical diagnostics, and detailed body repair procedures. Includes diagnostic flowcharts, detailed exploded views, and precise specifications for all repairable components. Suitable for professional technicians and advanced DIY enthusiasts.

Wiring Diagrams Included:

Yes, comprehensive color-coded wiring diagrams for all major electrical systems, including engine control, lighting, accessories, comfort features, and safety systems.

Troubleshooting Methodology:

Detailed, step-by-step diagnostic procedures based on symptoms, Diagnostic Trouble Codes (DTCs), and component testing. Includes flowcharts for efficient problem diagnosis.

Special Tools Identification:

Identification and usage instructions for specialized tools required for specific repair procedures (e.g., suspension alignment tools, engine timing tools, clutch alignment tools).

📊 Manual Specifications

File Format:

PDF (Portable Document Format), optimized for digital viewing and printing.

Print Quality:

High-resolution scans or original manufacturer digital files, ensuring clear text, sharp diagrams, and legible wiring schematics. Text is typically searchable for quick information retrieval.

Binding Type:

N/A (Digital Format)

Paper Type:

N/A (Digital Format)

File Content Searchability:

Searchable PDF text allows for quick keyword searches of specific components, procedures, or technical terms.

File Content Navigation:

Hyperlinked table of contents and internal links facilitate easy navigation through the manual's sections.

⚙️ Engine Specifications

Primary Engine:

2.0L SPI (SOHC) Inline-4

Engine Variants:

2.0L DOHC Zetec-E Inline-4, 2.3L DOHC Duratec Inline-4

Horsepower:

110 hp @ 5000 rpm

Torque:

125 lb-ft @ 3200 rpm

Horsepower:

130 hp @ 5300 rpm

Torque:

135 lb-ft @ 4300 rpm

Horsepower:

145 hp @ 6000 rpm

Torque:

155 lb-ft @ 4200 rpm

Fuel System:

Electronic Fuel Injection (EFI), Sequential Multi-Port Fuel Injection (MPI)

Displacement 2.0 Spi:

1988 cc

Displacement 2.0 Zetec:

1988 cc

Displacement 2.3 Duratec:

2295 cc

Cooling System:

Pressurized liquid cooling system with thermostat and fan

Ignition System:

Electronic ignition with distributorless ignition system (DIS) or coil-on-plug (COP) depending on engine variant

🔧 Transmission

Standard Transmission:

5-Speed Manual (IB5) on most models, MTX-75 Manual on Zetec models

Optional Transmission:

4-Speed Automatic (AX4S, AX4N, 4F50N)

Manual Transmission Features:

Hydraulically actuated clutch, dual-mass flywheel on some variants

Automatic Transmission Features:

Electronic controls, torque converter lock-up

📐 Dimensions

Length Sedan:

172.4 in (4379 mm)

Width Sedan:

67.5 in (1715 mm)

Height Sedan:

57.2 in (1453 mm)

Length Hatchback:

165.4 in (4201 mm)

Width Hatchback:

67.5 in (1715 mm)

Height Hatchback:

57.2 in (1453 mm)

Wheelbase:

103.0 in (2616 mm)

Curb Weight Min:

2715 lbs (1232 kg)

Curb Weight Max:

2950 lbs (1338 kg)

Cargo Volume Sedan:

12.4 cu ft

Cargo Volume Hatchback:

20.0 cu ft (seats up)

🛡️ Safety Features

NHTSA Driver Front Impact:

4 stars

NHTSA Passenger Front Impact:

4 stars

NHTSA Side Impact Driver:

4 stars

NHTSA Side Impact Rear Passenger:

4 stars

IIHS Moderate Overlap Front:

Good

IIHS Side Impact:

Acceptable

Active Safety Features:

Optional Anti-lock Braking System (ABS), Optional Traction Control System (TCS), Power-assisted steering

Passive Safety Features:

Front airbags (driver and passenger), Side-impact airbags (optional), 3-point seat belts with pretensioners, Crumple zones, Steel safety cage

💡 Technology Features

Infotainment System:

Basic AM/FM stereo with CD player and optional premium sound system. Auxiliary input was not common on this model year. Manual covers basic radio removal/installation and speaker wiring.

Driver Assistance Features:

Limited to optional ABS and TCS. No advanced driver-assistance systems (ADAS) like adaptive cruise control or lane-keeping assist were available.

Connectivity Options:

Basic diagnostics via OBD-II port. No integrated Bluetooth or smartphone connectivity.

🔧 Maintenance

Oil Change Interval:

Every 3,000-5,000 miles (4,800-8,000 km) or 6 months, whichever comes first (refer to manual for specific engine/oil type).

Air Filter Replacement:

Every 15,000-30,000 miles (24,000-48,000 km) or 1-2 years.

Spark Plug Replacement:

Varies by engine: SPI (30,000 miles), Zetec (100,000 miles), Duratec (100,000 miles) - consult manual.

Coolant Flush:

Every 30,000-50,000 miles (48,000-80,000 km) or 2-3 years.

Engine Oil Spec:

SAE 5W-30 (API Certified) for most engines, check manual for specific viscosity and API service classification.

Transmission Fluid Manual:

Refer to manual for specific gear oil type (e.g., SAE 75W-90 GL-4 for IB5, MTX-75).

Transmission Fluid Automatic:

MERCON V for AX4S, AX4N, 4F50N transmissions.

Coolant Spec:

Ford Gold Antifreeze/Coolant (or equivalent meeting specification WSS-M97B44-D)

Brake Fluid Spec:

DOT 3

Common Issues:

Ignition coil failure (Zetec engine), EGR valve issues, catalytic converter problems, rear axle bearing wear (especially on earlier models), front suspension component wear (control arms, ball joints), power steering pump leaks, rear main seal leaks, window regulator failures.

Oil Filter Part Number Example:

Motorcraft FL-400S or equivalent

Air Filter Part Number Example:

Motorcraft FA-1688 or equivalent

📚 Vehicle History

Brand Heritage:

Ford Motor Company, established in 1903, is one of the oldest and largest automobile manufacturers globally, renowned for iconic vehicles and innovation in mass production.

Model Evolution:

The Ford Focus was introduced globally in 1998 as a replacement for the Ford Escort. The 2003 model year represents the first generation (Mk1) of the Focus, which underwent a facelift for the 2002 model year. It was praised for its European design and handling characteristics, setting a new benchmark for Ford in the compact segment.

Production Locations:

Major production sites included Wayne, Michigan (USA), Saarlouis (Germany), Valencia (Spain), and St. Petersburg (Russia).

Production Years:

First Generation: 1998-2007 (Globally). North American production for this generation: 2000-2007.

🏆 Awards & Recognition

Competitors Award:

Car and Driver's 10Best list (for some earlier model years, reflecting its strong competitive placement).

Jdpower Initial Quality Ranking:

While specific rankings vary by year and segment, the Focus generally performed moderately in initial quality surveys compared to segment leaders at the time.

Certification:

N/A (This is a service manual, not a vehicle certification).