🏷️ Basic Information

Make:

Citroën

Model:

C4

Year:

2004

Engine Variant:

1.6i 16V

Engine Code:

Likely TU5JP4 or EC5 (specific code not provided in product info, but these are common for 1.6L 16V in this era)

Chassis Code:

Likely B7 (Platform for Peugeot 307 and Citroën C4)

👋 Introduction

Segment:

Compact family car / hatchback, competing in the C-segment.

Brand Perception:

Citroën is known for its distinctive styling, comfortable ride, and innovative features. The C4 represented a significant step in design and technology for the brand in its segment.

Key Competitors:

Ford Focus, Volkswagen Golf, Opel Astra, Renault Mégane, Peugeot 307, Honda Civic, Toyota Auris.

Design:

The C4 is recognized for its futuristic and often quirky design, particularly the fixed-hub steering wheel and distinctive interior layouts introduced with the first generation.

Comfort And Ride:

Citroën's signature comfortable suspension setup, offering a smooth and compliant ride quality.

Technology And Innovation:

Early adoption of features like automatic headlights, rain-sensing wipers, cruise control, and advanced safety systems for its time.

User Benefit:

Enables owners to perform maintenance and repairs, saving on dealership costs and extending vehicle life. Provides in-depth understanding of vehicle systems.

📋 Manual Details

Main Coverage:

Complete factory service and repair for the Citroën C4 1.6i 16V 2004.

Model Years Covered:

Primarily 2004, with potential applicability to closely related model years within the first generation.

Trim Levels Covered:

All Trim Levels (as stated 'All Models/Engines/Trim/Transmissions Types').

Engine Variants Covered:

Specifically the 1.6i 16V engine. The mention of 'All Models/Engines/Trim/Transmissions Types' suggests broader coverage within the C4 range, but the primary focus is the specified variant.

Estimated Page Count:

Detailed factory service manuals for this era and complexity typically range from 1500 to 3000+ pages. Specific count not provided.

Type:

Factory Service Repair Manual / Workshop Manual

Language:

English

File Format:

PDF

📖 Manual Coverage

Powertrain:

Engine mechanicals (including disassembly/reassembly), fuel system, throttle body, cooling system, lubrication system, exhaust system.

Chassis:

Suspension (front and rear), steering system, braking system (including ABS if equipped), wheel bearings, hub assemblies.

Electrical:

Complete electrical system diagnostics, lighting system, ignition system, charging system, starting system, body control modules, comfort systems.

Bodywork:

Body panel removal and installation, interior trim, glass, doors, hinges, locks, body sealing.

Emissions:

Emission control systems, diagnostic trouble codes (DTCs) related to emissions, catalytic converter, oxygen sensors.

Maintenance:

Periodic maintenance schedules, oil changes, filter replacements, fluid checks and changes, spark plug replacement, brake pad replacement, belt inspection and replacement.

Troubleshooting:

Diagnostic procedures for common and uncommon faults across all systems, symptom-based troubleshooting guides, interpretation of diagnostic trouble codes.

Repair:

Step-by-step repair instructions for major components and systems, including engine rebuild, transmission overhaul (if applicable), suspension component replacement, electrical component repair.

Diagnostics:

Detailed diagnostic steps for engine management, ABS, airbags, climate control, and other electronic systems, often including scan tool data interpretation.

Wiring Diagrams:

Comprehensive electrical wiring diagrams for all vehicle systems, essential for troubleshooting electrical faults.

Depth:

Factory-level technical detail, suitable for both DIY enthusiasts with mechanical aptitude and professional technicians. Includes exploded views, torque specifications, special tool requirements, and detailed procedures.

📊 Manual Specifications

PDF Quality:

High-quality, likely scanned or digitally created factory documentation, with clear text and legible diagrams. Specified as 'top quality diagrams and instructions'.

Searchability:

Typically PDF documents of this nature are text-searchable, allowing quick access to specific topics.

Printable:

Printable without restriction, allowing users to print specific sections or the entire manual.

Binding:

Digital Download (PDF format) - No physical binding.

Paper Type:

Not applicable for digital download.

Completeness Guarantee:

Stated as 'COMPLETE and INTACT as should be without any MISSING/CORRUPT part or pages'.

⚙️ Engine Specifications

Engine Type:

Inline 4-cylinder, naturally aspirated petrol engine.

Displacement:

1.6 Liters (1587 cc, typically)

Valvetrain:

DOHC (Double Overhead Camshaft), 16 valves.

Fuel Delivery:

Multi-point Fuel Injection (MPI).

Horsepower:

Approximately 110 PS (108 hp, 80.9 kW) at around 6000 rpm (typical for TU5JP4).

Torque:

Approximately 147 Nm (108 lb-ft) at around 4000 rpm (typical for TU5JP4).

Throttle Body Type:

Likely electronic throttle control (drive-by-wire) for this generation and engine size, though earlier models might have had mechanical.

Cooling Type:

Water-cooled, with thermostat-controlled fan.

Oil Capacity:

Approximately 3.5 - 4.0 liters (check manual for precise spec and recommended oil grade).

🔧 Transmission

Type:

Likely a 5-speed manual transmission (e.g., BE4 or MA5 variants) as standard.

Type:

Optionally available with an AL4 (or similar) 4-speed automatic transmission.

Fluid Type:

Manual: SAE 75W-80 GL-5. Automatic: Specific ATF fluid (e.g., LT71141 or equivalent). (Consult manual for exact specifications).

📐 Dimensions

Body Styles:

Available as 5-door hatchback and 3-door hatchback. (Other body styles like saloon and estate were introduced with the second generation C4).

Length:

Approx. 4270 mm (5-door hatchback).

Width:

Approx. 1770 mm (excluding mirrors).

Height:

Approx. 1490 mm.

Curb Weight:

Approximately 1250-1350 kg, depending on equipment and transmission.

Gross Vehicle Weight:

Typically around 1800-1900 kg.

🛡️ Safety Features

Euro Ncap Rating:

5 Stars (for the first generation C4 in general).

ABS:

Standard Anti-lock Braking System.

Esp:

Optional or standard on higher trims, Electronic Stability Program.

Brake Assist:

Likely included as part of the ABS system.

Airbags:

Front airbags, side airbags, curtain airbags (depending on trim).

Seatbelts:

Pre-tensioning front seatbelts, load limiters.

Child Seat Anchors:

ISOFIX mounting points.

💡 Technology Features

Audio System:

Standard radio/CD player, often with steering wheel mounted controls. Higher trims might offer upgraded sound systems.

Display:

Central digital display for vehicle information and audio, often part of the unique dashboard layout.

Cruise Control:

Available, often integrated with steering wheel controls.

Parking Sensors:

Optional rear parking sensors available on some models.

Bluetooth:

Limited availability on 2004 models; often introduced in later facelifts or as an aftermarket option.

🔧 Maintenance

Oil Change Interval:

Typically 15,000 km or 1 year, whichever comes first (check manual for specific recommendations based on driving conditions).

Timing Belt Replacement:

Crucial for this engine; typically around 90,000 - 120,000 km or 5-6 years. Consult the manual for the exact interval and recommended replacement parts (belt kit, tensioner, idler pulleys, water pump).

Brake Fluid Change:

Typically every 2 years.

Engine Oil Grade:

Likely PSA/Total Quartz 9000 5W-40 or 5W-30, meeting ACEA A3/B4 or C2/C3 specifications. **Crucial to verify exact specification in the manual.**

Coolant Type:

Long-life antifreeze coolant, typically PSA specification (e.g., Type D blue or red concentrated coolant).

Brake Fluid Type:

DOT 4 (or DOT 4 Plus for enhanced performance).

Ignition Coils:

Can be prone to failure, leading to misfires.

Electronic Throttle Body:

Can sometimes develop issues leading to rough idling or engine management warning lights.

Suspension Components:

Wear on front wishbone bushings and rear axle bearings can occur over time, affecting ride and handling.

Electrical Gremlins:

As with many modern vehicles, intermittent electrical issues can arise, often related to body control modules or wiring harnesses. Comprehensive wiring diagrams in the manual are essential.

📚 Vehicle History

Citroen Legacy:

Citroën, a French manufacturer, has a long history of innovation, particularly in suspension technology (hydropneumatic systems) and avant-garde design, dating back to André-Gustave Citroën.

C4 Introduction:

The first generation Citroën C4 was launched in 2004, succeeding the Citroën Xsara. It was built on the PSA PF2 platform, shared with the Peugeot 307.

Design Philosophy:

The C4 aimed to blend comfort, safety, and distinctive styling, often featuring unique interior elements like the fixed-center steering wheel and digital instrument cluster.

Manufacturing Location:

Primarily produced at PSA Peugeot Citroën's factories in France (e.g., Aulnay-sous-Bois) and Spain (e.g., Villaverde, Madrid).

🏆 Awards & Recognition

Safety Award:

Achieved a 5-star Euro NCAP safety rating, highlighting its robust structural integrity and comprehensive safety features for its era.